John Tooker, Ph.D.

John Tooker, Ph.D.

  • Professor of Entomology
  • Director of Graduate Studies
  • Coordinator of Entomology minor
506 Agricultural Sciences and Industries Building
and 113 Merkle Lab

University Park, PA 16802

Areas of Expertise

  • Insect ecology
  • Plant-insect interactions
  • Conservation biological control
  • Chemical ecology
  • Gall insects

Education

  • B.S. - Bates College, 1992
  • M.S. - University of Illinois at Urbana-Champaign, 1999 (advisor: Larry Hanks)
  • Ph.D. - University of Illinois at Urbana-Champaign, 2003 (advisor: Larry Hanks)
  • Postdoctoral scholar, Penn State, 2003-2008 (advisor: Consuelo De Moraes)
  • Fulbright Scholar, 2017-2018, Institut de Recherche sur la Biologie de l'Insecte, University of Tours, France.

Media coverage - Read some of the news coverage our work has received!

Current graduate students

  • Francesca Ferguson, PhD student in Ecology
    • B.S., Environmental Chemistry, Juniata College
  • Daniel Bliss, MS student
    • B.S., Biology, Ursinus College 

Current postdoctoral researchers

Dr. Eric Yip (PhD, Cornell) - Ecology of plant-insect interactions in Solidago

Dr. Matthew Boucher (PhD, Cornell) - Ecology of invertebrate pests in no-till, cover cropped fields, Precision Sustainable Agriculture

Current undergraduate students

  • John Sauter

Summer Help 2017 - Tooker Lab

Ken, Jen, Kyra, Dan (L to R) enjoying some gall collecting!

Lab manager

Andrew Aschwanden

Former graduate students

Eric Bohenblust, PhD student, Graduated 2014
(Current position: US EPA)

  • EPA STAR Graduate Fellowship
  • John Henry Comstock Award from Entomological Society of America
  • Asa Fitch Award from Entomological Society of America

Ian Grettenberger, PhD student, Graduated 2015
(Current position: Assistant Professor, Univ. California, Davis)

  • USDA NIFA Graduate Fellowship recipient
  • USDA NE-SARE Graduate Fellowship recipient
  • Sigma Xi Grant-in-Aid of Research recipient

Anjel Helms, PhD student, Graduated 2015 (Ecology Program; co-advised with Mark Mescher)
(Current position: Assistant Professor of Entomology, Texas A&M)

  • NSF Graduate Fellowship recipient
  • PSU Alumni Association Dissertation Award

Maggie Douglas, MS student, Graduated 2012; PhD student, Graduated 2016
(Current position: Assistant Professor, Dickinson College)

  • USDA Borlaug Fellowship recipient
  • USDA NE-SARE Graduate Fellowship recipient
  • Asa Fitch Memorial Award for Best Masters Student, Eastern Branch of the Entomological Society of America, 2012
  • Sigma Xi Grant-in-Aid of Research recipient

Anna Busch, MS student, Graduated 2016
(Current position: Agronomy Extension Educator, Union County, PA)

  • B.S., Plant Biology - Michigan State University

Anthony Vaudo, PhD student (co-advised with Christina Grozinger), Graduated 2016
(Current position: Postdoc, Leonard Lab, Dept. of Biology, University of Nevada, Reno)

  • M.S., Entomology, University of Florida
  • USDA NIFA Graduate Fellowship recipient
  • Recipient of North American Pollinator Protection Campaign Bee Health Improvement Project Grant
  • Sigma Xi Grant-in-Aid of Research recipient

Angela Coco, MS student, Graduated 2019
(Current position: Product Development Engineer, Hercon Environmental)

  • B.S., Environmental Science - King's College

Sarah McTish, MS student, Graduated 2019
(Current position: Extension Educator, Penn State Extension, Berks County, PA)

  • B.S., Agricultural Science - Penn State

Kirsten Pearsons, PhD student, Graduated 2020
(Current position: NRCS, Colorado)

  • B.S., Environmental Toxicology - University of California, Davis
  • USDA NE-SARE Graduate Fellowship recipient

Elizabeth Rowen, PhD student, Graduated 2020
(Current position: Service Assistant Professor of Entomology, West Virginia University)

  • M.S., Entomology - Purdue University
  • USDA NIFA Graduate Fellowship recipient
  • USDA NE-SARE Graduate Fellowship recipient

Melanie Kammerer Allen, PhD student, Graduated 2020 (Ecology Program; co-advised with Christina Grozinger)
(Current position: SCINet Postdoctoral Fellow, USDA-ARS, University Park, PA)

  • M.S., Ecology - Penn State
  • USDA NIFA Graduate Fellowship recipient

Julie Golinski, MS student, Graduated 2020
(Current position: Associate Entomologist, FMC Corp.)

  • B.S., Washington College

Julie Baniszewski, PhD student, Graduated 2021

  • M.S., Plant And Soil Science - University of Kentucky
  • USDA NE-SARE Graduate Fellowship recipient

Former postdoctoral researchers

  • Dr. Kevin Rice (PhD, Ohio State) - Ecology of brown marmorated stink bug (Current position: Assistant Professor, University of Missouri, Division of Plant Sciences)
  • Dr. Anjel Helms (PhD, Penn State) - Ecology of plant-insect interactions in Solidago (Current position: Assistant Professor of Entomology, Texas A&M)
  • Dr. Marion Le Gall (PhD, Texas A&M) - Ecological control of slugs in no-till crop fields (Current position: Assistant Research Professor, Arizona State University)
  • Dr. Kirsten Pearsons (PhD, Penn State) - Ecotoxicology of invertebrates in no-till crop fields

Former undergraduate researchers

Lasair Ni Chochlain, B.S. Penn State Schreyer Honors College, Graduated 2021

Hayden Bock, B.S. Penn State, Graduated 2020

Sarah McTish, B.S. Penn State, Graduated 2017

Allie Shoffner, B.S. Penn State Schreyer Honors College, Graduated 2012

Departmental focus areas

Chemical Ecology

Ecological Applications

Research

Insect-plant interactions in agricultural systems, chemical ecology, induced host-plant defenses, natural-enemy ecology, tritrophic interactions, gall-inducing insects

Word clouds built from batches of recent abstracts

(These clouds give a sense of our research areas/themes/systems. The size of the word is proportional to the frequency of its use in the abstracts; from wordle.com):


2017

2017 Word Cloud - Tooker Lab

2014

2014 Word Cloud - Tooker Lab

2011

Word Cloud

Publications

Pearsons, K. A., S. Lower, and J. F. Tooker. Toxicity of clothianidin to common Eastern North American fireflies. PeerJ, in press.

Busch, A. K. B. Ezray, and J. F. Tooker. Life History, Biology, and Distribution of Pterostichus melanarius (Coleoptera: Carabidae) in North America. Environmental Entomology, in press.

Johnston-Fennell, L., J. F. Tooker, B. Nault, and K. Wickings. 2021. Preventative pest management in field crops influences the biological control potential of epigeal arthropods and soil-borne entomopathogenic fungi. Field Crops Research 272:108265.

Baniszewski, J, A. Burton, A. R. Kemanian, G. W. Roth, and J. F. Tooker. 2021. Wheat intraspecific diversity suppressed diseases with subdued economic and ecosystem services benefits. Agriculture, Ecosystems and Environment, 315: 107438.

Pearsons, K. A., E. K. Rowen, K. Elkin, K. Wickings, R. Smith, and J. F. Tooker. Neonicotinoids from seed coatings persistently contaminate adjacent no-till fields, despite mitigation efforts. Environmental Science & Technology 55: 4679-4687.

Tooker, J. F. and K. A. Pearsons. 2021. Newer characters, same story: neonicotinoid insecticides disrupt food webs through direct and indirect effects. Current Opinion in Insect Science 46: 50-56.

Yip, E. C., I. Mikó, J. M. Ulmer; N. A. Cherim; M. A. Townley; S. Poltak, A. M. Helms, C. M. De Moraes; M. C. Mescher, and J. F. Tooker. 2021. Giant polyploid epidermal cells and male pheromone production in the tephritid fruit fly Eurosta solidaginis (Diptera: Tephritidae). Journal of Insect Physiology 130: 104210.

Burton, A. B., J. Baniszewski, G. W. Roth, J. F. Tooker, and A. R. Kemanian. 2021. Are polycultures for silage pragmatic medleys or gallimaufries? Agronomy Journal 113: 1205-1221.

Hammer, T. J., R. De Clerck-Floate, J. F. Tooker, P. W. Price, D.G. Miller III, and E. F. Connor. 2021. Are bacterial symbionts associated with gall induction in insects? Arthropod-Plant Interactions 15: 1-12.

Frame, S. T., K. A. Pearsons, K. R. Elkin, L. S. Saporito, H. E. Preisendanz, H. D. Karsten, and J. F. Tooker. 2021. Assessing surface and subsurface transport of neonicotinoid insecticides from crop fields. Journal of Environmental Quality 50: 476-484.

Kammerer, M., S. Goslee, M. R. Douglas, J. F. Tooker, and C. M. Grozinger. 2021. Shifting norms: wild bees as winners and losers of land use and climate change. Global Change Biology 27: 1250-1265.

Krupke, C. and Tooker, J.F., 2020. Beyond the headlines: the influence of insurance pest management on an unseen, silent entomological majority. Frontiers in Sustainable Food Systems 4: 251. https://doi.org/10.3389/fsufs.2020.595855

Tooker, J. F., and D. Giron. 2020. The evolution of endophagy in herbivorous insects. Frontiers of Plant Science 11: 581816.

Rowen, E. K., and J. F. Tooker. 2020. Ground predator activity-density and predation rates are weakly supported by dry-stack cow manure and wheat cover crops in no-till maize. Environmental Entomology 50: 46-57.

Frank, S. D. and J. F. Tooker. 2020. Opinion: Neonicotinoids pose undocumented threats to food webs. Proceedings of National Academy of Science USA, 117: 22609-22613.

Coco, A. M., M. T. Lewis, S. J. Fleischer, and J. F. Tooker. 2020. Parasitoids, nematodes, and protists in populations of striped cucumber beetle, Acalymma vittatum (Coleoptera: Chrysomelidae). Environmental Entomology 49: 1316–1326.

Pearsons, K. A., and J. F. Tooker. 2021. Preventative insecticide use affects arthropod decomposers and decomposition in field crops. Applied Soil Ecology 157: 103757.

Kirkpatrick, D. M., K. B. Rice, A. Ibrahim, S. J. Fleischer, J. F. Tooker, A. Tabb, H. Medeiros, W. R. Morrison III, and T. C. Leskey. 2020. The influence of marking methods on mobility, survivorship and field recovery of Halyomorpha halys adults and nymphs (Hemiptera: Pentatomidae). Environmental Entomology 49: 1026–1031.

Kammerer, M., J. F. Tooker, and C. M. Grozinger. 2020. A long-term dataset on wild bee abundance in Mid-Atlantic United States. Scientific Data 7: 240.

Yip, E., C. M. De Moraes, J. F. Tooker, M. C. Mescher. 2020. Sensory coevolution: The sex attractant of a gall-making fly primes plant defences, but female flies recognize resulting changes in host-plant quality. Journal of Ecology 109: 99-108.

Vaudo, A. D., J. F. Tooker, H. Patch, D. Biddinger, M. Coccia, M. Crone, M. Fiely, J. Francis, H. Hines, M. Hodges, S. Jackson, D. Michez, J. Mu, L. Russo, M. Safari, E. Treanore, M. Vanderplanck, E. Yip, A. Leonard, and C. Grozinger. 2020. Pollen macronutrient ratios guide broad patterns of bee species floral. Insects 11(2): E132.

Andreas, P., A. Kisiala, R.J.N. Emery, R. De Clerck-Floate, J. F. Tooker, P. W. Price, D. G. Miller III, M.-S. Chen, and E. F. Connor. 2020. Cytokinins are abundant and widespread among insect species. Plants 9: 2.

Rowen, E. K., K. Regan, M. E. Barbercheck, and J. F. Tooker. 2020. Is Tillage Beneficial or Detrimental for Invertebrate Pest Management? A Meta-Analysis. Agriculture, Ecosystems & Environment, in press.

Busch, A. K., M. R. Douglas, G. M. Malcolm, H. D. Karsten, and J. F. Tooker. 2020. A high-diversity/IPM cropping system fosters beneficial arthropod populations, limits invertebrate pests, and produces competitive corn yields. Agriculture, Ecosystems & Environment, in press.

Grettenberger, I. M. and J. F. Tooker. 2020. Variety mixtures of soybeans have inconsistent effects on herbivore and natural-enemy populations. Agriculture, Ecosystems and Environment, in press.

Tooker, J. F., M. E. O'Neal, C. Rodriguez-Saona. 2020. Balancing disturbance and conservation in agroecosystems to improve biological control. Annual Review of Entomology 65: 81-100.

Jones, A. G., K. Hoover, K. Pearsons, J. F. Tooker, and G. W. Felton. 2019. Potential impacts of translocation of neonicotinoid insecticides to cotton (Gossypium hirsutum [Malvales: Malvaceae]) extrafloral nectar on parasitoids" Environmental Entomology, in press. Available online: doi.org/10.1093/ee/nvz157

Walter, J. A., L. W. Sheppard, P. D. Venugopal, D. C. Reuman, G. Dively, J. F. Tooker, and D. M. Johnson. 2019. Weather and crop composition drive spatial synchrony of lepidopteran agricultural pests. Ecological Entomology, in press. Available online: doi.org/10.1111/een.12830

Rowen, E. K., and J. F. Tooker. 2019. Manure decreases herbivore performance but increases early-season damage on corn in the greenhouse and field. Environmental Entomology, in press. Available online: doi.org/10.1093/ee/nvz145

Reed, H., W. Curran, J. Tooker, S. Duiker, and H. Karsten. 2019. Planting green effects on corn and soybean production. Agronomy Journal 111: 2314-2325.

Acevedo, F. E., P. Smith, M. Peiffer, A. M. Helms, J. F. Tooker, and G. W. Felton. 2019. Phytohormones in fall armyworm saliva modulate defense responses in plants. Journal of Chemical Ecology 45: 598–609.

Yip, E., J. F. Tooker, M. C. Mescher, and C. M. De Moraes. 2019. Costs of plant defense priming: Exposure to volatile cues from a specialist herbivore alters growth in tall goldenrod, implications for plant fitness. BMC Plant Biology 19: 209.

Rowen, E. K., J. F. Tooker, and C. Blubaugh. 2019. Soil fertility management to promote arthropod pest suppression. Invited manuscript, Biological Control 134: 130-140.

Yip, E., R. P. Sowers, A. M. Helms, M. C. Mescher, C. M. De Moraes, and J. F. Tooker. 2019. Tradeoffs between defenses against different specialist herbivores in goldenrod (Solidago altissima). Invited manuscript. Arthropod-Plant Interactions 13: 279-287.

Helms, A. M., S. Ray, N. Matulis, Nina, M. Kuzemchak, W. Grisales, J. F. Tooker, and J. Ali. 2019. Chemical cues from belowground natural enemies enhance plant defences and influence herbivore behaviour and performance. Functional Ecology 33: 798-808.

Douglas, M. R., J. Chang, K. Begum, S. Subramanian, J. F. Tooker, S. Nurul Alam, S. Ramasamy. 2019. Evaluation of biorational insecticides and DNA barcoding as tools to improve insect pest management in lablab bean (Lablab purpureus) in Bangladesh. Journal of Asia-Pacific Entomology 21: 1326-1336. https://doi.org/10.1016/j.aspen.2018.10.007

Zemenick, A. T., R. R. Kula, L. Russo, and J. F .Tooker. 2019. A network approach reveals parasitoid wasps to be generalized nectar foragers. Arthropod-Plant Interactions 13: 239-251; available online: doi.org/10.1007/s11829-018-9642-9

Harth, J. E., M. E. Ferrari, A. M. Helms, J. F. Tooker, A. G. Stephenson. 2018. Viral infection limits establishment and severity of a powdery mildew in wild populations of Cucurbita pepo. Frontiers in Plant Science 9: 792.

Walter, J., A. Ives, J. F. Tooker, D, M. Johnson. 2018. Life history and habitat explain variation among insect pest populations subject to global change. Ecosphere 9: e02274.

Vaudo, A. D., L. M. Farrell, H. M. Patch, C. M. Grozinger, and J. F. Tooker. 2018. Consistent pollen nutritional intake drives bumble bee (Bombus impatiens) colony growth and reproduction across different habitats. Ecology and Evolution 8: 5765-5776.

Abbot, P., J. F. Tooker, and S. Lawson. 2018. Chemical ecology and sociality in aphids: opportunities and directions. Journal of Chemical Ecology 44: 770-784.

Tooker, J. F., M. R. Douglas, C. Krupke. 2017. Neonicotinoid seed treatments: limitations and compatibility with Integrated Pest Management. Agricultural & Environmental Letters 2(1), DOI: 10.2134/ael2017.08.0026.

Russo, L, A. Miller, J. F. Tooker, O. Bjornstad, and K. Shea. Quantitative evolutionary patterns in mutualistic networks: Vicariance, phylogenetic tracking, or coevolution? Methods in Ecology and Evolution, in press. DOI: 10.1111/2041-210X.12914

Castano-Duque, L., K. Loades, J. F. Tooker, K. Brown, W. P. Williams, and D. S. Luthe. A maize inbred exhibits resistance against western corn rootwoorm, Diabrotica virgifera virgifera. Journal of Chemical Ecology, in press.

Pearsons, K., I. and J. F. Tooker. 2017. In-field habitat management to optimize pest control of novel soil communities in agroecosystems, Insects 8(3):82. DOI: 10.3390/insects8030082.

Helms, A. M., C. M. De Moraes, A. Tröger, H. T. Alborn, W. Francke, J. F. Tooker, M. C. Mescher. 2017. Identification of an insect-produced olfactory cue that primes plant defenses. Nature Communications 8: 337. DOI:10.1038/s41467-017-00335-8

Le Gall, M., and J. F. Tooker. Developing ecologically based pest management programs for terrestrial molluscs. Journal of Pest Science 90: 825–838.

Pearsons, K., I. Mikó, J. F. Tooker. 2017. The cyanide gland of the greenhouse millipede, Oxidus gracilis (Polydesmida: Paradoxosomatidae). Research Ideas and Outcomes 3: e12249. DOI: 10.3897/rio.3.e12249.

Yip, E., C. M. De Moraes, M. C. Mescher, J. F. Tooker. 2017. The volatile emission of a specialist herbivore alters patterns of plant defence, growth and flower production in a field population of goldenrod (Solidago altissima). Functional Ecology 31: 1062–1070. DOI: 10.1111/1365-2435.12826

Koch, R., B. Potter, P. Glogoza, E. Hodgson, C. Krupke, J. Tooker, C. DiFonzo, A. Michel, K. Tilmon, T. Prochaska, J. Knodel, R. Wright, T. Hunt, B. Jensen, A. Varenhorst, B. McCornack, K. Estes, J. Spencer. 2016. Biology and economics of recommendations for insecticide-based management of soybean aphid. Plant Health Progress 17: 265-269.

Douglas, M. R., and J. F. Tooker. 2016. Meta-analysis reveals that neonicotinoid seed treatments and pyrethroids have similar negative effects on abundance of arthropod natural enemies. PeerJ 4:e2776.

Vaudo, A. D., D. Stabler, H. M. Patch, J. F. Tooker, C. M. Grozinger, and G. A. Wright. 2016. Bumble bees regulate their intake of the essential protein and lipid pollen macronutrients. Journal of Experimental Biology 219: 3962-3970.

Grettenberger, I. M., and J. F. Tooker. 2016. Variety mixtures of wheat influence aphid populations and attract an aphid predator. Arthropod-Plant Interactions, in press. Available online: DOI: 10.1007/s11829-016-9477-1.

Rice, K. B., R. Troyer, K. M. Watrous, J. F. Tooker, and S. J. Fleischer. 2016. Landscape factors influencing stink bug damage in agricultural systems following the introduction of the brown marmorated stink bug (Hemiptera: Pentatomidae). Journal of Economic Entomology, in press. Available online: doi: 10.1093/jee/tow252.

Vaudo, A. D., H. M. Patch, D. A. Mortensen, J. F. Tooker, C. M. Grozinger. 2016. Macronutrient ratios in pollen shape bumble bee (Bombus impatiens) foraging strategies and floral preferences. Proceedings of National Academy of Science USA, 113:E4035-42. Available online: doi: 10.1073/pnas.1606101113.

Campbell C., L. Russo, A. Marins, O. DeSouza, K. Schönrogge, D. Mortensen, J. F. Tooker, R. Albert, and K. Shea. 2016. Top-down network analysis characterizes hidden termite–termite interactions. Ecology and Evolution, in press. doi:10.1002/ece3.2313.

Walls, J. T, P. Caciagli, J. F. Tooker, J. M. Russo, E. G. Rajotte, C. Rosa. 2016. Modeling the decision process for barley yellow dwarf management. Computers and Electronics in Agriculture 127: 775–786.

Grettenberger, I. M. and J. F. Tooker. 2016. Inter-varietal interactions among plants in genotypically diverse mixtures tend to decrease herbivore performance.Oecologia 182: 189-202 (available online: doi:10.1007/s00442-016-3651-0).

Bohnenblust, E. W., A. D. Vaudo, J. F. Egan, D. A. Mortensen, and J. F. Tooker. 2016. Effects of the herbicide dicamba on non-target plants and pollinator visitation. Environmental Toxicology and Chemistry 35(1):144–151. DOI: 10.1002/etc.3169

Rice, K. B., S. J. Fleischer, C. M. De Moraes, M. C. Mescher, J. F. Tooker, and M. Gish. 2015. Handheld lasers allow efficient detection of fluorescent marked organisms in the field. PLoS ONE 10(6): e0129175. doi:10.1371/journal.pone.0129175.

Ray, S., I. Gaffor, F. Acevedo, A. M. Helms, W.-P. Chuang, J.F. Tooker, G. W. Felton, D. S. Luthe. 2015. Maize plants recognize herbivore-associated cues from caterpillar frass. Journal of Chemical Ecology 41: 781–792.

Vaudo, A. D., J. F. Tooker, C. M. Grozinger, and H. M. Patch. 2015. Bee nutrition and floral resource restoration. Current Opinion in Insect Science 10: 133–141. DOI:dx.doi.org/10.1016/j.cois.2015.05.008

Grettenberger, I. M., and J. F. Tooker. 2015. Moving beyond resistance management toward an expanded role for seed mixtures in agriculture. Agriculture, Ecosystems and Environment 208: 29–36. DOI:10.1016/j.agee.2015.04.019

Douglas, M. R., and J. F. Tooker. 2015. Large-Scale Deployment of Seed Treatments Has Driven Rapid Increase in Use of Neonicotinoid Insecticides and Preemptive Pest Management in U.S. Field Crops. Environ. Sci. Technol. 49(8): 5088–5097, DOI: 10.1021/es506141g.

Douglas, M. R., J. R. Rohr, and J. F. Tooker. 2015. Neonicotinoid insecticide travels through a soil food chain, disrupting biological control of non-target pests and decreasing soybean yield. Journal of Applied Ecology 52: 250–260. (Editor's Choice article and image from the article featured on the cover, DOI: 10.1111/1365-2664.12372; and read our Research Brief on the topic, and a related post in the blog of the Journal of Applied Ecology.)

Glenna, L., Tooker, J. F., Welsh, R., Ervin, D. Intellectual property, scientific independence, and the efficacy and environmental impacts of genetically engineered crops. Rural Sociology 80 (2): 147–172.
**Selected The 2015 Paper of the Year in Rural Sociology**

Tooker, J. F., and A. M. Helms. 2014. Phytohormone dynamics associated with gall insects, and their potential role in the evolution of the gall-inducing habit. Journal of Chemical Ecology 40:742-753.

Helms, A. M., C. M. De Moraes, M. C. Mescher, and J. F. Tooker. 2014. The volatile emission of Eurosta solidaginis primes herbivore-induced volatile production in Solidago altissima and does not directly deter insect feeding. BMC Plant Biology 14:173

Vaudo, A. D., H. M. Patch, D. A. Mortensen, C. M. Grozinger, and J. F. Tooker. 2014. Bumble bees exhibit daily behavioral patterns in pollen foraging. Arthropod-Plant Interactions 8: 273-283.

Rice, K., C. Bergh, E. Bergmann, D. Biddinger, C. Dieckhoff, G. Dively, H. Fraser, T. Gariepy, G. Hamilton, T. Haye, A. Herbert, K. Hoelmer, C. Hooks, A. Jones, G. Krawczyk, T. Kuhar, H. Martinson, W. Mitchell, A. Nielsen, D. Pfeiffer, M. Raupp, C. Rodriguez-Saona, P. Shearer, P. Shrewsbury, D. Venugopal, J. Whalen, N. Wiman, T. Leskey, J. Tooker. 2014. Biology, ecology, and management of brown marmorated stink bug (Halyomorpha halys). Journal of Integrated Pest Management 5:A1-A13.

McCarville. M. T., M. E. O'Neal, B. D. Potter, K. J. Tilmon, E. M. Cullen, B. P. McCornack, J. F. Tooker, and D. A. Prischmann-Voldseth. 2014. One gene versus two: a regional study on the efficacy of single gene versus pyramided resistance for soybean aphid management. Journal of Economic Entomology 107(4):1680-1687.

Toth, A. L., J. F. Tooker, S. Radhakrishnan, R. Minard, M. T. Henshaw, C. M. Grozinger. Shared genes related to aggression, rather than chemical communication, are associated with reproductive dominance in paper wasps (Polistes metricus). BMC Genomics 15:75 doi:10.1186/1471-2164-15-75

Egan, J. F., E. W. Bohnenblust, S. Goslee, D. A. Mortensen, and J. F. Tooker. 2014. Herbicide drift affects plant and arthropod communities. Agriculture, Ecosystems, and Environment 185: 77–87.

Bohnenblust, E. W., J. A. Breining, J. A. Shaffer, S. J. Fleischer, G. W. Roth, and J. F. Tooker. 2014. Current European corn borer, Ostrinia nubilalis, injury levels in the Northeastern US and the value of Bt field corn. Pest Management Science 70: 1711-1719. DOI: 10.1002/ps.3712.

Schipanski, M. E., M. Barbercheck, M. R. Douglas, D. M. Finney, K. Haider, J. P. Kaye, A. R. Kemanian, D. A. Mortensen, M. R. Ryan, J. F. Tooker, and C. White. 2014. A conceptual framework for evaluating ecosystem services provided by cover crops in agroecosystems. Agricultural Systems 125: 12-22.

Chung, S. H., C. Rosa, E. D. Scully, M. Peiffer, J. F. Tooker, K. Hoover, D. S. Luthe, and G. W. Felton. 2013. Herbivore exploits orally secreted bacteria to suppress plant defenses. Proceedings of the National Academy of Science, USA 110: 15728-15733.

Bohnenblust, E. W., J Breining, G. W. Roth, and J. F. Tooker. 2013. Corn pith weevil, Geraeus penicillus (Coleoptera: Curculionidae), in transgenic, insect-resistant and conventional field corn hybrids. Journal of Applied Entomology 137: 668-672.

Bohnenblust, E. W., J Breining, S. J. Fleischer, G. W. Roth, and J. F. Tooker. 2013. Corn earworm in Northeastern field corn: pest threat and the value of transgenic hybrids. Journal of Economic Entomology 106 (3): 1250-1259.

Bohnenblust, E., Egan, J.F., Mortensen, D.M., Tooker, J. 2013. Direct and Indirect Effects of the Synthetic-Auxin Herbicide Dicamba on Two Lepidopteran Species. Environmental Entomology 42 (3): 586-594.

Helms AM, De Moraes CM, Tooker JF, Mescher MC. 2013. Exposure of Solidago altissima plants to volatile emissions of an insect antagonist (Eurosta solidaginis) deters subsequent herbivory. Proceedings of National Academy of Science USA 110: 199-204. DOI: 10.1073/pnas.1218606110

Shoffner AV, Tooker JF. 2013. The potential of genotypically diverse cultivar mixtures to moderate aphid populations in wheat (Triticum aestivum L.). Arthropod-Plant Interactions 7: 33-43. (Shoffner was an undergraduate Honors student in the lab.)

Tooker JF, Frank SD. 2012. Genotypically diverse cultivar mixtures for insect pest management and increased crop yields. Journal of Applied Ecology 49:974-985. doi: 10.1111/j.1365-2664.2012.02173.x.

Kim J, Tooker JF, Luthe DS, De Moraes CM, Felton GW 2012. Insect eggs can enhance wound response in plants: a study system of tomato Solanum lycopersicum L. and Helicoverpa zea Boddie. PLoS ONE 7(5): e37420. doi:10.1371/journal.pone.0037420

Tian, D., Tooker, J. F., Peiffer, M., Chung, S., and G. W. Felton. 2012. Role of trichomes in defense against herbivores: Comparison of herbivore response to woolly and hairless trichome mutants in tomato (Solanum lycopersicum). Planta 236: 1053-66.

Tian, D, M. Peiffer, E. Shoemaker, J. Tooker, E. Haubruge, E. Francis, D. S. Luthe, and G. W. Felton. 2012. Salivary glucose oxidase from caterpillars mediates the induction of rapid and delayed-induced defenses in the tomato plant PLoS ONE 7(4): e36168. doi:10.1371/journal.pone.0036168.

Frost, C. J., Smyers E. C., Dean J. M., Mescher M. C, Carlson, J. E., De Moraes C. M., and J. F. Tooker. 2012. A petiole-galling insect herbivore decelerates leaf lamina litter decomposition rates. Functional Ecology 26: 628–636. DOI: 10.1111/j.1365-2435.2012.01986.x

Cui, L.L., F. Francis, Y. Liu, S. Heuskin, G. Lognay, J. Dong, J. Chen, C. Bragard, J. F. Tooker, and Y. Liu. 2012. E-β-Farnesene syngergizes the influence of an insecticide to improve control of cabbage aphids in China. Crop Protection 35: 91–96.

Douglas, M. R. and J. F. Tooker. 2012. Slug (Mollusca: Agriolimacidae, Arionidae) ecology and management in no-till field crops, with an emphasis on the Mid-Atlantic region. Journal of Integrated Pest Management 3: C1-C9.

Graham, E E., J. F. Tooker, and L. M. Hanks. 2012. Floral host plants of adult beetles of central Illinois. Annals of the Entomological Society of America 105: 287-297.

Wang, G., L. L. Cui, J. Dong, F. Francis, Y. Liu, and J. F. Tooker. 2011. Combining intercropping with semiochemical releases: optimisation of alternative control of Sitobion avenae in wheat crops in China. Entomologia Experimentalis et Applicata 140: 189-195.

Kluger, E. C., S. H. Berlocher, L. M. Hanks, and J. F. Tooker. 2011. Consequences of habitat fragmentation for the prairie-endemic weevil Haplorhynchites aeneus. Environmental Entomology 40: 1388-1396.

Tooker, J. F. and C. M. De Moraes. 2011. Feeding by Hessian fly (Mayetiola destructor [Say]) larvae increases levels of fatty acids and indole-3-acetic acid, but not hormones involved in plant-defense signaling. Journal of Plant Growth Regulation 30: 158-165.

Tooker, J. F. and C. M. De Moraes. 2011. Feeding by a gall-inducing caterpillar species increases levels of indole-3-acetic and decreases abscisic acid in Solidago altissima stems. Arthropod-Plant Interactions 5: 115-124.

Onstad, D. W., P. D. Mitchell, T. M. Hurley, J. G. Lundgren, R. P. Porter, C. H. Krupke, J. L. Spencer, C. D. DiFonzo, T. S. Baute, R. L. Hellmich, L. Buschman, W. D. Hutchison, J. F. Tooker. 2011. Seeds of change: Corn seed mixtures for resistance management and IPM. Journal of Economic Entomology 104: 343-352.

Tooker, J. F., and Fleischer, S. J. 2010. First report of western bean cutworm (Striacosta albicosta) in Pennsylvania. Online. Crop Management doi:10.1094/CM-2010-0616-01-RS.

Tooker, J. F, Peiffer M., D. S. Luthe, and G. W. Felton. 2010. Trichomes as sensors: detecting activity on the leaf surface. Plant Signaling & Behavior 5:73-75.

Peiffer M., J. F. Tooker, D. S. Luthe, and G. W. Felton. 2010. Plants on early alert: glandular trichomes as sensors for insect herbivores. New Phytologist 184:644-656.

Tooker, J. F. and C. M. De Moraes. 2009. A gall-inducing caterpillar species increases essential fatty acid content of its host plant without concomitant increases in phytohormone levels. Molecular Plant-Microbe Interactions 22(5): 551-559.

Tooker, J. F. and C. M. De Moraes. 2008. Gall insects and indirect plant defenses: a case of active manipulation? Plant Signaling & Behavior 3:79-80.

Tooker, J. F., J. R. Rohr, W. G. Abrahamson, and C. M. De Moraes. 2008. Gall insects can evade and alter indirect plant defenses. New Phytologist 178: 657671.

Tooker, J. F. and C. M. De Moraes. 2007. Feeding by Hessian fly [Mayetiola destructor (Say)] larvae does not induce plant indirect defences. Ecological Entomology 32:153-161.

Tooker, J. F. and C. M. De Moraes. 2007. Jasmonate, salicylate, and benzoate in insect eggs. Journal of Chemical Ecology 33:331-343.

Tooker, J.F., and C.M. De Moraes. 2006. Jasmonate in lepidopteran larvae. Journal of Chemical Ecology 32: 2321-2326.

Tooker, J.F., and L.M. Hanks.2006. Tritrophic interactions influence reproduction of prairie perennials (Asteraceae: Silphium). Environmental Entomology 35: 537-545.

Tooker, J.F., M. Hauser, and L.M. Hanks. 2006. Floral host plants of syrphidae and tachinidae (Diptera) of central Illinois. Annals of the Entomological Society of America 99: 96-112.

Tooker, J.F. and C.M. De Moraes. 2005. Jasmonate in lepidopteran eggs and neonates. Journal of Chemical Ecology 31: 2753-2759.

Ellis, J.A., A.D. Walter, J.F. Tooker, M.D. Ginzel, P.F. Reagel, E.S. Lacey, A.B. Bennett, E.M. Grossman, and L.M. Hanks. 2005. Conservation biological control in urban landscapes: Manipulating parasitoids of bagworm (Lepidoptera: Psychidae) with flowering forbs. Biological Control 34: 99-107.

Tooker, J.F., A. L.Crumrin, and L.M. Hanks. 2005. Plant volatiles are behavioral cues for adult females of the gall wasp Antistrophus rufus. Chemoecology 15: 85-88.

Tooker, J. F., and L. M. Hanks. 2004. Endophytic insect communities of two prairie perennials (Asteraceae: Silphium spp.). Biodiversity and Conservation 13: 2551-2566.

Tooker, J. F., and L. M. Hanks. 2004. Impact of prescribed burning on endophytic insect communities of prairie perennials (Asteraceae: Silphium spp.). Biodiversity and Conservation 13: 1875-1888.

Tooker, J. F., A. R. Deans, and L. M. Hanks. 2004. Description of the Antistrophus rufus (Hymenoptera: Cynipidae) species complex, including two new species. Journal of Hymenoptera Research 13: 125-133.

Tooker, J. F., and L. M. Hanks. 2004. Trophic position of the endophytic beetle Mordellistena aethiops Smith (Coleoptera: Mordellidae). Environmental Entomology 33: 291-296.

Tooker, J. F., and L. M. Hanks. 2004. Stereochemistry of host plant monoterpenes as mate location cues for the gall wasp Antistrophus rufus. Journal of Chemical Ecology 30: 473-477."

Favret, C., J. F. Tooker, and L. M. Hanks. 2004 Iowana frisoni Hottes (Hemiptera: Aphididae) redescribed, with notes on its biology. Proceedings of the Entomological Society of Washington 106: 26-34.

Tooker, J. F., W. A. Koenig, and L. M. Hanks. 2002. Altered host plant volatiles are proxies for sex pheromones in the gall wasp Antistrophus rufus. Proceedings of National Academy of Science USA 99: 15486-15491.

Tooker, J. F., P. F. Reagel, and L. M. Hanks. 2002. Nectar sources of day-flying Lepidoptera of central Illinois. Annals of the Entomological Society of America 95: 84-96.

Tooker, J. F., and L. M. Hanks. 2000. Influence of plant community structure on natural enemies of pine needle scale (Homoptera: Diaspididae) in urban landscapes. Environmental Entomology 29: 1305-1311.

Tooker, J. F., and L. M. Hanks. 2000. Flowering plant hosts of adult hymenopteran parasitoids of central Illinois. Annals of the Entomological Society of America 93: 580-588.

Publications

Planted-green cover crops in maize/soybean rotations confer stronger bottom-up than top-down control of slugs
Agro-Ecosystems, Le Gall, Marion, Boucher, Matthew, Tooker, John F., 2022

Life History, Biology, and Distribution of Pterostichus melanarius (Coleoptera
Environmental Entomology, Busch, Anna K., Wham, Briana E., Tooker, John F., 2021

Preventative pest management in field crops influences the biological control potential of epigeal arthropods and soil-borne entomopathogenic fungi
Field Crops Research, Johnston-Fennell, Lindsay, Tooker, John, Nault, Brian A., Wickings, Kyle, 2021

Wheat intraspecific diversity suppressed diseases with subdued yield, economic return and arthropod predation services
Agro-Ecosystems, Baniszewski, Julie, Burton, Amanda, Kemanian, Armen R., Roth, Greg, Tooker, John, 2021

Newer characters, same story
Current Opinion in Insect Science, Tooker, John F., Pearsons, Kirsten A., 2021

Small-Grain Cover Crops Have Limited Effect on Neonicotinoid Contamination from Seed Coatings
Environmental Science & Technology, Pearsons, Kirsten A., Rowen, Elizabeth K., Elkin, Kyle R., Wickings, Kyle, Smith, Richard G., Tooker, John F., 2021

Giant polyploid epidermal cells and male pheromone production in the tephritid fruit fly Eurosta solidaginis (Diptera
Journal of Insect Physiology, Yip, Eric C., Mikó, István, Ulmer, Jonah M., Cherim, Nancy A., Townley, Mark A., Poltak, Steffen, Helms, Anjel M., De Moraes, Consuelo M., Mescher, Mark C., Tooker, John F., 2021

Assessing surface and subsurface transport of neonicotinoid insecticides from no-till crop fields
Journal of Environmental Quality, Frame, Sarah T., Pearsons, Kirsten A., Elkin, Kyle R., Saporito, Louis S., Preisendanz, Heather E., Karsten, Heather D., Tooker, John F., 2021

Wild bees as winners and losers
Global Change Biology, Kammerer, Melanie, Goslee, Sarah C., Douglas, Margaret R., Tooker, John F., Grozinger, Christina M., 2021

Are polycultures for silage pragmatic medleys or gallimaufries?
Journal of Production Agriculture, Burton, Amanda B., Baniszewski, Julie, Roth, Greg W., Tooker, John F., Kemanian, Armen R., 2021

Are bacterial symbionts associated with gall induction in insects?
Arthropod-Plant Interactions, Hammer, Tobin J., De Clerck-Floate, Rosemarie, Tooker, John F., Price, Peter W., Miller, Donald G., Connor, Edward F., 2021

Preventive insecticide use affects arthropod decomposers and decomposition in field crops
Applied Soil Ecology, Pearsons, Kirsten A., Tooker, John F., 2021

Sensory co-evolution
Journal of Ecology, Yip, Eric C., De Moraes, Consuelo M., Tooker, John F., Mescher, Mark C., 2021

Insecticide-contaminated honeydew
Biological Reviews, Calvo-Agudo, Miguel, Tooker, John F., Dicke, Marcel, Tena, Alejandro, 2021

Toxicity of clothianidin to common Eastern North American fireflies
PeerJ, Pearsons, Kirsten Ann, Lower, Sarah E., Tooker, John F., 2021

Beyond the Headlines
Frontiers in Sustainable Food Systems, Krupke, Christian H., Tooker, John F., 2020

A long-term dataset on wild bee abundance in Mid-Atlantic United States
Scientific data, Kammerer, Melanie, Tooker, John F., Grozinger, Christina M., 2020

Parasitoids, nematodes, and protists in populations of striped cucumber beetle (Coleoptera
Environmental Entomology, Coco, Angela M., Lewis, Margaret T., Fleischer, Shelby J., Tooker, John F., 2020

The Evolution of Endophagy in Herbivorous Insects
Frontiers in Plant Science, Tooker, John F., Giron, David, 2020

The Influence of Marking Methods on Mobility, Survivorship, and Field Recovery of Halyomorpha halys (Hemiptera
Environmental Entomology, Kirkpatrick, Danielle M., Rice, Kevin B., Ibrahim, Aya, Fleischer, Shelby J., Tooker, John F., Tabb, Amy, Medeiros, Henry, Morrison, William R., Leskey, Tracy C., 2020

Neonicotinoids pose undocumented threats to food webs
Proceedings of the National Academy of Sciences of the United States of America, Frank, S. D., Tooker, J. F., 2020

Weather and regional crop composition variation drive spatial synchrony of lepidopteran agricultural pests
Ecological Entomology, Walter, Jonathan A., Sheppard, Lawrence W., Venugopal, P. Dilip, Reuman, Daniel C., Dively, Galen, Tooker, John F., Johnson, Derek M., 2020

Is tillage beneficial or detrimental for insect and slug management? A meta-analysis
Agro-Ecosystems, Rowen, Elizabeth K., Regan, Karly H., Barbercheck, Mary E., Tooker, John F., 2020

Soybean aphid biotype 1 genome
Insect Biochemistry and Molecular Biology, Giordano, Rosanna, Donthu, Ravi Kiran, Zimin, Aleksey V., Julca Chavez, Irene Consuelo, Gabaldon, Toni, van Munster, Manuella, Hon, Lawrence, Hall, Richard, Badger, Jonathan H., Nguyen, Minh, Flores, Alejandra, Potter, Bruce, Giray, Tugrul, Soto-Adames, Felipe N., Weber, Everett, Marcelino, Jose A.P., Fields, Christopher J., Voegtlin, David J., Hill, Curt B., Hartman, Glen L., Akraiko, Tatsiana, Aschwanden, Andrew, Avalos, Arian, Band, Mark, Bonning, Bryony, Bretaudeau, Anthony, Chiesa, Olga, Chirumamilla, Anitha, Coates, Brad S., Cocuzza, Giuseppe, Cullen, Eileen, Desborough, Peter, Diers, Brian, DiFonzo, Christina, Heimpel, George E., Herman, Theresa, Huanga, Yongping, Knodel, Janet, Ko, Chiun Cheng, Labrie, Genevieve, Lagos-Kutz, Doris, Lee, Joon Ho, Lee, Seunghwan, Legeai, Fabrice, Mandrioli, Mauro, Manicardi, Gian Carlo, Mazzoni, Emanuele, Melchiori, Giulia, Micijevic, Ana, Tooker, John, 2020

A high-diversity/IPM cropping system fosters beneficial arthropod populations, limits invertebrate pests, and produces competitive maize yields
Agro-Ecosystems, Busch, Anna K., Douglas, Margaret R., Malcolm, Glenna M., Karsten, Heather D., Tooker, John F., 2020

Potential Impacts of Translocation of Neonicotinoid Insecticides to Cotton (Gossypium hirsutum (Malvales
Environmental Entomology, Jones, Asher G., Hoover, Kelli, Pearsons, Kirsten, Tooker, John F., Felton, Gary W., 2020

Fertilizing Corn with Manure Decreases Caterpillar Performance but Increases Slug Damage
Environmental Entomology, Rowen, Elizabeth, Tooker, John F., 2020

Pollen protein
Insects, Vaudo, Anthony D., Tooker, John F., Patch, Harland M., Biddinger, David J., Coccia, Michael, Crone, Makaylee K., Fiely, Mark, Francis, Jacob S., Hines, Heather M., Hodges, Mackenzie, Jackson, Stephanie W., Michez, Denis, Mu, Junpeng, Russo, Laura, Safari, Maliheh, Treanore, Erin D., Vanderplanck, Maryse, Yip, Eric, Leonard, Anne S., Grozinger, Christina M., 2020

Cytokinins are abundant and widespread among insect species
Plants, Andreas, Peter, Kisiala, Anna, Neil Emery, R. J., De Clerck-Floate, Rosemarie, Tooker, John F., Price, Peter W., Miller, Donald G., Chen, Ming Shun, Connor, Edward F., 2020

Balancing disturbance and conservation in agroecosystems to improve biological control
Annual Review of Entomology, Tooker, John F., O'Neal, Matthew E., Rodriguez-Saona, Cesar, 2020

Phytohormones in fall armyworm saliva modulate defense responses in plants
Journal of Chemical Ecology, Acevedo, Flor Edith, Smith, Philip, Peiffer, Michelle, Helms, Anjel, Tooker, John, Felton, Gary W., 2019

Managing fertility with animal waste to promote arthropod pest suppression
Biological Control, Rowen, Elizabeth, Tooker, John F., Blubaugh, Carmen K., 2019

Costs of plant defense priming
BMC Plant Biology, Yip, Eric C., Tooker, John F., Mescher, Mark C., De Moraes, Consuelo M., 2019

Chemical cues linked to risk
Functional Ecology, Helms, Anjel M., Ray, Swayamjit, Matulis, Nina L., Kuzemchak, Margaret C., Grisales, William, Tooker, John F., Ali, Jared G., 2019

Trade-offs between defenses against herbivores in goldenrod (Solidago altissima)
Arthropod-Plant Interactions, Yip, Eric C., Sowers, Rosalie P., Helms, Anjel M., Mescher, Mark C., De Moraes, Consuelo M., Tooker, John F., 2019

A network approach reveals parasitoid wasps to be generalized nectar foragers
Arthropod-Plant Interactions, Zemenick, Ash T., Kula, Robert R., Russo, Laura, Tooker, John, 2019

Planting Green Effects on Corn and Soybean Production
Journal of Production Agriculture, Reed, Heidi K., Karsten, Heather D., Curran, William S., Tooker, John F., Duiker, Sjoerd W., 2019

Evaluation of biorational insecticides and DNA barcoding as tools to improve insect pest management in lablab bean (Lablab purpureus) in Bangladesh
Journal of Asia-Pacific Entomology, Douglas, Margaret R., Chang, Jan, Begum, Kohinoor, Subramanian, Sevgan, Tooker, John F., Alam, Syed Nurul, Ramasamy, Srinivasan, 2018

Potato leafhopper is abundant in alfalfa
Field Crop News, Tooker, John, 2018

Zucchini yellow mosaic virus infection limits establishment and severity of powdery mildew in wild populations of cucurbita pepo
Frontiers in Plant Science, Harth, Jacquelyn E., Ferrari, Matthew J., Tooker, John F., Stephenson, Andrew G., 2018

Insect pest active the first week of June
Field Crop News, Tooker, John, 2018

Consistent pollen nutritional intake drives bumble bee (Bombus impatiens) colony growth and reproduction across different habitats
Ecology and Evolution, Vaudo, Anthony D., Farrell, Liam M., Patch, Harland M., Grozinger, Christina M., Tooker, John F., 2018

Black cutworm moths arriving, and seedcorn maggots making themselves known
Field Crop News, Tooker, John, 2018

Alfalfa insect management
Field Crop News, Tooker, John, 2018

Black cutworm moths and slugs are becoming active
Field Crop News, Tooker, John, 2018

Life history and habitat explain variation among insect pest populations subject to global change
Ecosphere, Walter, Jonathan A., Ives, Anthony R., Tooker, John F., Johnson, Derek M., 2018

Pests to keep in mind: Cereal leaf beetle and timothy mite
Field Crop News, Tooker, John, 2018

Watch out for alfalfa weevil
Field Crop News, Tooker, John, 2018

Penn State's Black cutworm monitoring network
Field Crop News, Tooker, John, 2018

Managing Crop Pests with Cultivar Mixtures
Penn State Entomology Factsheet, Tooker, John, 2018

Quantitative evolutionary patterns in bipartite networks
Methods in Ecology and Evolution, Russo, Laura, Miller, Adam D., Tooker, John, Bjornstad, Ottar N., Shea, Katriona, 2018

Chemical Ecology and Sociality in Aphids: Opportunities and Directions
Journal of Chemical Ecology, Abbot, Patrick, Tooker, John, Lawson, Sarah P., 2018

Erratum to
Frontiers in Plant Science, Harth, Jacquelyn E., Ferrari, Matthew J., Helms, Anjel M., Tooker, John F., Stephenson, Andrew G., 2018

A maize inbred exhibits resistance against western corn rootworm, Diabrotica virgifera virgifera
Journal of Chemical Ecology, Castano-Duque, Lina, Loades, Kenneth W., Tooker, John F., Brown, Kathleen M., Paul Williams, W., Luthe, Dawn S., 2017

Identification of an insect-produced olfactory cue that primes plant defenses
Nature Communications, Helms, Anjel M., De Moraes, Consuelo M., Tröger, Armin, Alborn, Hans T., Francke, Wittko, Tooker, John F., Mescher, Mark C., 2017

Kudzu bug
Field Crop News, Tooker, John, 2017

Western bean cutworm
Field Crop News, Tooker, John, 2017

Corn leaf aphid
Field Crop News, Tooker, John, 2017

Preparing for slugs for next year
Field Crop News, Tooker, John, 2017

Watch out for potato leafhoppers populations
Field Crop News, Tooker, John, 2017

Silent Sparks: The Wondrous World of Fireflies Sara Lewis
American Entomologist, Tooker, John, 2017

Invertebrate pests are making their presence known
Field Crop News, Tooker, John, 2017

Black cutworm
Field Crop News, Tooker, John, 2017

Insect pests to keep in mind: Black cutworm, cereal leaf beetle, and true armyworm
Field Crop News, Tooker, John, 2017

The usual suspects for this time of year: black cutworm and slugs
Field Crop News, Tooker, John, 2017

Insect pests to keep in mind: armyworm, black cutworm, alfalfa weevil, and pea aphids
Field Crop News, Tooker, John, 2017

The volatile emission of a specialist herbivore alters patterns of plant defence, growth and flower production in a field population of goldenrod
Functional Ecology, Yip, Eric C., De Moraes, Consuelo M., Mescher, Mark C., Tooker, John F., 2017

Aphids In Timothy Fields
Field Crop News, Tooker, John, 2017

Black cutworm monitoring network
Field Crop News, Tooker, John, 2017

Variety mixtures of wheat influence aphid populations and attract an aphid predator
Arthropod-Plant Interactions, Grettenberger, Ian M., Tooker, John F., 2017

Warmer than Average Winter and Pest Populations
Field Crop News, Tooker, John, 2017

Landscape Factors Influencing Stink Bug Injury in Mid-Atlantic Tomato Fields
Journal of Economic Entomology, Rice, Kevin B., Troyer, Rachael R., Watrous, Kristal M., Tooker, John F., Fleischer, Shelby J., 2017

Correction: Bumble bees regulate their intake of essential protein and lipid pollen macronutrients
The Journal of Experimental Biology, Vaudo, AD, Stabler, D, Patch, HM, Tooker, John, Grozinger, CM, Wright, GA, 2017

The cyanide gland of the greenhouse millipede, Oxidus gracilis (Polydesmida: Paradoxosomatidae)
Research Ideas and Outcomes, Pearsons, Kirsten, Mik\'o, Istv\'an, None, Tooker, John, 2017

Insect Pest Management Sections
Penn State Agronomy Guide, Tooker, John, 2017

Neonicotinoid Seed Treatments
Agricultural and Environmental Letters, Tooker, John F., Douglas, Margaret R., Krupke, Christian H., 2017

Bumble bees regulate their intake of essential protein and lipid pollen macronutrients
Journal of Experimental Biology, Vaudo, A. D., Stabler, D., Patch, H. M., Tooker, J. F., Grozinger, C. M., Wright, G. A., 2016

Landscape factors influencing stink bug injury in Mid-Atlantic tomato fields.
Journal of Economic Entomology, Rice, K, Troyer, R, Watrous, K, Tooker, John, Fleischer, S, 2016

Open Letter Regarding Efficacy of Cry1F Trait on Western Bean Cutworm
Field Crop News, Tooker, John, 2016

Modeling the decision process for barley yellow dwarf management
Computers and Electronics in Agriculture, Walls, Joseph T., Caciagli, Piero, Tooker, John F., Russo, Joseph M., Rajotte, Edwin G., Rosa, Cristina, 2016

Top-down network analysis characterizes hidden termite–termite interactions
Ecology and Evolution, Campbell, Colin, Russo, Laura, Marins, Alessandra, DeSouza, Og, Schönrogge, Karsten, Mortensen, David, Tooker, John, Albert, Réka, Shea, Katriona, 2016

Worms in your ears? (earworm and western bean cutworm)
Field Crop News, Tooker, John, 2016

Insect Update - two-spotted spider mites, aphids, potato leafhoppers, western bean cutworm
Field Crop News, Tooker, John, 2016

Macronutrient ratios in pollen shape bumble bee (Bombus impatiens) foraging strategies and floral preferences
Proceedings of the National Academy of Sciences of the United States of America, Vaudo, Anthony D., Patch, Harland M., Mortensen, David A., Tooker, John F., Grozinger, Christina M., 2016

Two more pests to consider: armyworm and potato leafhoppers
Field Crop News, Tooker, John, 2016

Erratum
Current Opinion in Insect Science, Vaudo, Anthony D., Tooker, John F., Grozinger, Christina M., Patch, Harland M., 2016

Scouting time for black cutworm damage!
Field Crop News, Tooker, John, 2016

Watch for bean leaf beetle in your earliest emerging soybean fields
Field Crop News, Tooker, John, 2016

Scouting for black cutworm damage should begin soon in southern parts of Pennsylvania
Field Crop News, Tooker, John, 2016

slugs, alfalfa weevil, Cereal leaf beetle 24 May 2016
Field Crop News, Tooker, John, 2016

Black cutworm caterpillar are active, but cutting damage has not yet begun
Field Crop News, Tooker, John, 2016

Black cutworm moths continue to arrive, but the caterpillars do not appear to be developing quickly
Field Crop News, Tooker, John, 2016

Keep an eye out for cereal leaf beetle
Field Crop News, Tooker, John, 2016

Black cutworm moths are arriving; caterpillars will be active in the coming weeks
Field Crop News, Tooker, John, 2016

Good conditions for slugs
Field Crop News, Tooker, John, 2016

black cutworm, alfalfa weevil, Cereal leaf beetle
Field Crop News, Tooker, John, 2016

Alfalfa weevil starting to hatch
Field Crop News, Tooker, John, 2016

Black cutworm monitoring network
Field Crop News, Tooker, John, 2016

Effects of the herbicide dicamba on nontarget plants and pollinator visitation
Environmental Toxicology and Chemistry, Bohnenblust, Eric W., Vaudo, Anthony D., Egan, J. Franklin, Mortensen, David A., Tooker, John F., 2016

Sustainability of Genetically Engineered Insect-Resistant Crops: A View from the Fringe
Stewardship for the Sustainability of Genetically Engineered Crops: The Way Forward in Pest Management, Coexistence, and Trade., Tooker, John, 2016

Halyomorpha halys (brown marmorated stink bug)
CABI Crop Protection Compendium and Invasive Species Compendium, Leskey, TC, Hamilton, GC, Biddinger, DJ, Buffington, ML, Dieckhoff, C, Dively, GP, Fraser, H, Hedstrom, C, Herbert, DA, Hoelmer, KA, Tooker, John, 2016

The Effectiveness of Neonicotinoid Seed Treatments in Soybean, December 2015 (collaborative effort with entomologists from twelve land-grant universities)
Penn State Entomology Factsheet, Krupke, Christian, Tooker, John, 2015

Moving beyond resistance management toward an expanded role for seed mixtures in agriculture
Agro-Ecosystems, Grettenberger, Ian M., Tooker, John F., 2015

The value of bats to crop production
Field Crop News, Tooker, John, 2015

stink bug survey looking for participants
Field Crop News, Tooker, John, 2015

corn leaf aphid
Field Crop News, Tooker, John, 2015

Hessian fly and cover crops
Field Crop News, Tooker, John, 2015

Western bean cutworm
Field Crop News, Tooker, John, 2015

Assessing soybean fields for insect defoliation
Field Crop News, Tooker, John, 2015

Current Insect Issue: Western Corn Rootworm, True Armyworm, Tank Mixing
Field Crop News, Tooker, John, 2015

Insect pests to consider: soybean aphids, potato leaf hopper, armyworm, corn rootworm
Field Crop News, Tooker, John, 2015

Bee nutrition and floral resource restoration
Current Opinion in Insect Science, Vaudo, Anthony D., Tooker, John F., Grozinger, Christina M., Patch, Harland M., 2015

Handheld lasers allow efficient detection of fluorescent marked organisms in the field
PLoS One, Rice, Kevin B., Fleischer, Shelby J., De Moraes, Consuelo M., Mescher, Mark C., Tooker, John F., Gish, Moshe, 2015

Intellectual Property, Scientific Independence, and the Efficacy and Environmental Impacts of Genetically Engineered Crops
Rural Sociology, Glenna, Leland L., Tooker, John, Welsh, J. Rick, Ervin, David, 2015

black cutworm, true armyworm
Field Crop News, Tooker, John, 2015

Black cutworm
Field Crop News, Tooker, John, 2015

Alfalfa weevil starting to hatch
Field Crop News, Tooker, John, 2015

Black cutworm monitoring network
Field Crop News, Tooker, John, 2015

Timothy mite
Field Crop News, Tooker, John, 2015

Maize plants recognize herbivore-associated cues from caterpillar frass: Journal of Chemical Ecology
Journal of Chemical Ecology, Ray, Swayamjit, Gaffor, Iffa, Acevedo, Flo, Helms, Anjel, Chuang, Wen Po, Tooker, John, Felton, Gary W., Luthe, Dawn S., 2015

Sustainability of genetically engineered insect-resistant Crops: A view from the fringe, Tooker, John, 2015

Neotropical Gall Insects, Tooker, John, 2015

Insect Pest Management Sections
Penn State Agronomy Guide, Tooker, John, 2015

Questionable benefits of neonicotinoid seed treatments on soybean
Field Crop News, Tooker, John, 2014

When planting wheat consider Hessian fly and aphids
Field Crop News, Tooker, John, 2014

An Update on Pennsylvania Populations of Corn Rootworm Suspected of Resistance to Bt
Field Crop News, Tooker, John, 2014

Soybean Aphids and Grasshoppers in Soybean
Field Crop News, Tooker, John, 2014

Biology, ecology, and management of brown marmorated stink bug (Hemiptera
Journal of Integrated Pest Management, Rice, Kevin B., Bergh, Chris J., Bergmann, Erik J., Biddinger, Dave J., Dieckhoff, Christine, Dively, Galen, Fraser, Hannah, Gariepy, Tara, Hamilton, George, Haye, Tim, Herbert, Ames, Hoelmer, Kim, Hooks, Cerruti R., Jones, Ashley, Krawczyk, Greg, Kuhar, Thomas, Martinson, Holly, Mitchell, William, Nielsen, Anne L., Pfeiffer, Doug G., Raupp, Michael J., Rodriguez-Saona, Cesar, Shearer, Peter, Shrewsbury, Paula, Venugopal, P. Dilip, Whalen, Joanne, Wiman, Nik G., Leskey, Tracy C., Tooker, John F., 2014

Rootworm resistance to Bt in PA
Field Crop News, Tooker, John, 2014

Soybean aphid and western bean cutworm update
Field Crop News, Tooker, John, 2014

One gene versus two
Journal of Economic Entomology, McCarville, M. T., O'Neal, M. E., Potter, B. D., Tilmon, K. J., Cullen, E. M., McCornack, B. P., Tooker, J. F., Prischmann-Voldseth, D. A., 2014

Soybean aphids and western bean cutworm moths found in PA
Field Crop News, Tooker, John, 2014

Penn State's Western Bean Cutworm Trapping Network
Field Crop News, Tooker, John, 2014

Scout for armyworms and potato leafhopper
Field Crop News, Tooker, John, 2014

Other pests that are active: cereal leaf beetle and potato leaf hopper
Field Crop News, Tooker, John, 2014

Start scouting for black cutworm
Field Crop News, Tooker, John, 2014

An update on Black cutworm
Field Crop News, Tooker, John, 2014

Some populations of alfalfa weevil in nearby states may be resistant to pyrethroids
Field Crop News, Tooker, John, 2014

The usual suspects for this time of year
Field Crop News, Tooker, John, 2014

Cereal leaf beetle, black cutworm, alfalfa weevil - 29 April 2014
Field Crop News, Tooker, John, 2014

Combining Bt and soil insecticides does not appear beneficial for managing western corn rootworm
Field Crop News, Tooker, John, 2014

Black cutworm monitoring network-21 April 2014
Field Crop News, Tooker, John, 2014

overwintering mortality of bean leaf beetle
Field Crop News, Tooker, John, 2014

Using the PA-PIPE to track alfalfa weevil development
Field Crop News, Tooker, John, 2014

Insect Pest Management Sections
Organic Field Crop Production Guide Published, Barbercheck, M, Tooker, John, 2014

Herbicide drift can affect plant and arthropod communities
Agro-Ecosystems, Egan, J. Franklin, Bohnenblust, Eric, Goslee, Sarah, Mortensen, David, Tooker, John, 2014

A framework for evaluating ecosystem services provided by cover crops in agroecosystems
Agricultural Systems, Schipanski, Meagan E., Barbercheck, Mary, Douglas, Margaret R., Finney, Denise M., Haider, Kristin, Kaye, Jason P., Kemanian, Armen R., Mortensen, David A., Ryan, Matthew R., Tooker, John, White, Charlie, 2014

Cold winters and insect pests
Field Crop News, Tooker, John, 2014

Free corn rootworm management webinar
Field Crop News, Tooker, John, 2014

Shared genes related to aggression, rather than chemical communication, are associated with reproductive dominance in paper wasps (Polistes metricus)
BMC Genomics, Toth, Amy L., Tooker, John F., Radhakrishnan, Srihari, Minard, Robert, Henshaw, Michael T., Grozinger, Christina M., 2014

Bumble bees exhibit daily behavioral patterns in pollen foraging
Arthropod-Plant Interactions, Vaudo, Anthony D., Patch, Harland M., Mortensen, David A., Grozinger, Christina M., Tooker, John F., 2014

Current European corn borer, Ostrinia nubilalis, injury levels in the northeastern United States and the value of Bt field corn
Pest Management Science, Bohnenblust, Eric W., Breining, James A., Shaffer, John A., Fleischer, Shelby J., Roth, Gregory W., Tooker, John F., 2014

Corn pith weevil, Geraeus penicillus (Coleoptera
Journal of Applied Entomology, Bohnenblust, E., Breining, J., Roth, G., Tooker, J., 2013

CABI (Centre for Agricultural Bioscience International) Datasheet for Halyomorpha halys (Stål), (Hemiptera: Pentatomidae)
CABI Crop Protection Compendium and Invasive Species Compendium, Leskey, Tracy, Hamilton, George, Biddinger, D, Buffington, Matthew, Dieckhoff, Christine, Tooker, John, 2013

Herbivore exploits orally secreted bacteria to suppress plant defenses
Proceedings of the National Academy of Sciences of the United States of America, Chung, Seung Ho, Rosa, Cristina, Scully, Erin D., Peiffer, Michelle, Tooker, John F., Hoover, Kelli, Luthe, Dawn S., Felton, Gary W., 2013

Western corn rootworm resistance reported in NY
Field Crop News, Tooker, John, 2013

Cultivar Mixtures Can Increase Wheat Yield
Field Crop News, Tooker, John, 2013

Grain storage preparation will pay in the long run
Field Crop News, Tooker, John, 2013

Late season brown marmorated stink bugs populations in soybeans
Field Crop News, Tooker, John, 2013

Western Bean Cutworm Moths Are Flying
Field Crop News, Tooker, John, 2013

Kudzu Bug
Field Crop News, Tooker, John, 2013

Exploring the pest management and production benefits of cultivar mixtures
Field Crop News, Tooker, John, 2013

Pests to keep in mind: black cutworm, potato leafhoppers, and slugs
Field Crop News, Tooker, John, 2013

Soybean Sentinel Plot Program for 2013
Field Crop News, Tooker, John, 2013

Insects to keep in mind-black cutworm, cereal leaf beetle, armyworm
Field Crop News, Tooker, John, 2013

Direct and indirect effects of the synthetic-auxin herbicide dicamba on two lepidopteran species
Environmental Entomology, Bohnenblust, Eric, Egan, J. Franklin, Mortensen, David, Tooker, John Frazier, 2013

Corn earworm (Lepidoptera
Journal of Economic Entomology, Bohnenblust, Eric, Breining, Jim, Fleischer, Shelby Jay, Roth, Gregory Wayne, Tooker, John Frazier, 2013

Stay vigilant for cereal leaf beetle, slugs, and black cutworm
Field Crop News, Tooker, John, 2013

Significant flights of black cutworm
Field Crop News, Tooker, John, 2013

Be thankful for a more normal spring, but be wary of slugs as planting progresses
Field Crop News, Tooker, John, 2013

Aphids and barley yellow dwarf virus
Field Crop News, Tooker, John, 2013

Looking for fields infested with Barley Yellow Dwarf Virus
Field Crop News, Tooker, John, 2013

Alfalfa Weevil Pest Prediction and Soil Temperatures found on PA-PIPE
Field Crop News, Tooker, John, 2013

Start Watching For Mites in Timothy
Field Crop News, Tooker, John, 2013

Brown marmorated stink bug, January 2013
Penn State Entomology Factsheet, Tooker, John, 2013

Exposure of Solidago altissima plants to volatile emissions of an insect antagonist (Eurosta solidaginis) deters subsequent herbivory
Proceedings of the National Academy of Sciences of the United States of America, Helms, Anjel M., De Moraes, Consuelo M., Tooker, John F., Mescher, Mark C., 2013

The potential of genotypically diverse cultivar mixtures to moderate aphid populations in wheat (Triticum aestivum L.)
Arthropod-Plant Interactions, Shoffner, Alexandra, Tooker, John, 2013

Insect Pest Management Sections
Penn State Agronomy Guide, Tooker, John, 2013

Aphids in small grain or grass forage fields
Field Crop News, Tooker, John, 2012

Metaldehyde use on slugs in corn and soybeans
Field Crop News, Tooker, John, 2012

Genotypically diverse cultivar mixtures for insect pest management and increased crop yields
Journal of Applied Ecology, Tooker, John F., Frank, Steven D., 2012

Corn pith weevil
Field Crop News, Tooker, John, 2012

Bean leaf beetles and brown marmorated stink bugs in soybeans
Field Crop News, Tooker, John, 2012

Grain Storage Preparation and Maintenance Saves Quality
Field Crop News, Tooker, John, 2012

Status of brown marmorated stink bugs
Field Crop News, Tooker, John, 2012

Hessian fly – August 2012
Penn State Entomology Factsheet, Tooker, John, 2012

Brown marmorated stink bug populations patchy but locally large
Field Crop News, Tooker, John, 2012

Insect populations become noticeable: true armyworm and brown marmorated stink bug
Field Crop News, Tooker, John, 2012

Insects active in soybeans and corn
Field Crop News, Tooker, John, 2012

Spider Mite Flare-up in Soybeans
Field Crop News, Tooker, John, 2012

Insect active in crop fields
Field Crop News, Tooker, John, 2012

Armyworms, potato leafhopper, and corn rootworms
Field Crop News, Tooker, John, 2012

Insect issues: growing insect populations
Field Crop News, Tooker, John, 2012

Insect issues: growing insect populations, and a Sentinel Plot Program in Soybeans
Field Crop News, Tooker, John, 2012

A horde of armyworms
Field Crop News, Tooker, John, 2012

A petiole-galling insect herbivore decelerates leaf lamina litter decomposition rates
Functional Ecology, Frost, Christopher J., Dean, Jennifer M., Smyers, Erica C., Mescher, Mark C., Carlson, John E., De Moraes, Consuelo M., Tooker, John F., 2012

A variety of insect and slug pests attracting attention this spring
Field Crop News, Tooker, John, 2012

Scout for slug and black cutworm damage, Keep resistance to Bt hybrids by western corn rootworm in mind this season
Field Crop News, Tooker, John, 2012

Role of trichomes in defense against herbivores
Planta, Tian, Donglan, Tooker, John, Peiffer, Michelle, Chung, Seung Ho, Felton, Gary W., 2012

Two caterpillars to consider: black cutworm and armyworm
Field Crop News, Tooker, John, 2012

E-β-farnesene synergizes the influence of an insecticide to improve control of cabbage aphids in China
Crop Protection, Cui, Liang Liang, Dong, Jie, Francis, Frédéric, Liu, Ying Jie, Heuskin, Stéphanie, Lognay, Georges, Chen, Ju Lian, Bragard, Claude, Tooker, J. F., Liu, Yong, 2012

Insect Pest Management Section
Penn State Certified Crop Advisor Study Guide, Tooker, John, 2012

Pests to keep in mind: Black cutworm, alfalfa weevil, cereal leaf beetle, and slugs
Field Crop News, Tooker, John, 2012

Salivary glucose oxidase from caterpillars mediates the induction of rapid and delayed-induced defenses in the tomato plant
PLoS One, Tian, Donglan, Peiffer, Michelle, Shoemaker, Erica, Tooker, John, Haubruge, Eric, Francis, Frederic, Luthe, Dawn S., Felton, Gary W., 2012

Black cutworm flights have begun
Field Crop News, Tooker, John, 2012

Seedcorn maggot
Field Crop News, Tooker, John, 2012

Crop Insect Pest Update
Field Crop News, Tooker, John, 2012

Warm weather and pest populations
Field Crop News, Tooker, John, 2012

Floral host plants of adult beetles in central illinois
Annals of the Entomological Society of America, Graham, Elizabeth E., Tooker, John Frazier, Hanks, Lawrence M., 2012

Slug (Mollusca
Journal of Integrated Pest Management, Douglas, Margaret R., Tooker, John F., 2012

Do not ignore the resistance threat from corn rootworms to Bt corn varieties
Field Crop News, Tooker, John, 2012

Insect eggs can enhance wound response in plants
PLoS One, Kim, Jinwon, Tooker, John F., Luthe, Dawn S., De Moraes, Consuelo M., Felton, Gary W., 2012

Insect Ecology: Behavior, Populations and Communities
American Entomologist, Tooker, John, 2012

Survey of native biocontrol agents of the brown marmorated stink bug in Pennsylvania fruit orchards and adjacent habitat
Pennsylvania Fruit News, Biddinger, D, Tooker, John, Surcica, Alex, Krawczyk, Greg, 2012