Heather Lee Grab, Ph.D.

The Importance of Landscape Composition for Pest Control and Crop Yield: A Global Quantitative Synthesis
Ecology Letters, Poveda, Katja, Karp, Daniel, Chaplin-Kramer, Rebecca, Centrella, Mary, Luttermoser, Tim, Perez-Alvarez, Ricardo, O'Rourke, Megan, Martin, Emily, Grab, Heather, 2025

Unraveling microclimate effects on pollinator foraging and crop yield in lowbush blueberry
Agro-Ecosystems, Sisk, Garrett, Ostraski, Anaís, Dillard, Travis, Hall, Bruce, Goslee, Sarah, Grozinger, C, Khanna, Vikas, Grab, Heather, 2025

Fall Flight of Allium Leafminer Observed in Southeast PA, Grab, Heather, Elkner, T, 2025

Land Use Change Consistently Reduces α- But Not β- and γ-Diversity of Bees
Global Change Biology, Tsang, Toby, De Santis, A., Armas-Quiñonez, Gabriela, Ascher, John, Ávila-Gómez, Eva, Báldi, András, Ballare, Kimberly, Balzan, Mario, Banaszak-Cibicka, Weronika, Bänsch, Svenja, Basset, Yves, Bates, Adam, Baumann, Jessica, Beal-Neves, Mariana, Bennett, Ashley, Bezerra, Antonio, Blochtein, Betina, Bommarco, Riccardo, Brosi, Berry, Burkle, Laura, Carvalheiro, Luísa, Castellanos, Ignacio, Cely-Santos, Marcela, Cohen, Hamutahl, Coulibaly, Drissa, Cunningham, Saul, Cusser, Sarah, Dajoz, Isabelle, Delaney, Deborah, Del-Val, Ek, Egerer, Monika, Eichhorn, Markus, Enríquez, Eunice, Entling, Martin, Escobedo-Kenefic, Natalia, Ferreira, Pedro, Fitch, Gordon, Forrest, Jessica, Fournier, Valérie, Fowler, Robert, Freitas, Breno, Gaines-Day, Hannah, Geslin, Benoît, Ghazoul, Jaboury, Glaum, Paul, Gonzalez-Andujar, Jose, González-Chaves, Adrian, Grab, Heather, Gratton, Claudio, Guenat, Solène, Gutiérrez-Chacón, Catalina, Hall, Mark, Hanley, Mick, Hass, Annika, Hennig, Ernest, Hermy, Martin, Hipólito, Juliana, Holzschuh, Andrea, Hopfenmüller, Sebastian, Hung, Keng, Hylander, Kristoffer, Izquierdo, Jordi, Jamieson, Mary, Jauker, Birgit, Javorek, Steve, Jha, Shalene, Klatt, Björn, Kleijn, David, Klein, Alexandra, Kovács-Hostyánszki, Anikó, Krauss, Jochen, Kuhlmann, Michael, Landaverde-González, Patricia, Latty, Tanya, Leong, Misha, Lerman, Susannah, Liu, Yunhui, Machado, Ana, Main, Anson, Mallinger, Rachel, Mandelik, Yael, Marques, Bruno, Matteson, Kevin, McCune, Frédéric, Meng, Ling, Metzger, Jean, Montoya-Pfeiffer, Paula, Morales, Carolina, Morandin, Lora, Morrison, Jane, Mudri-Stojnić, Sonja, Nalinrachatakan, Pakorn, Norfolk, Olivia, Otieno, Mark, Park, Mia, Philpott, Stacy, Pisanty, Gideon, Plascencia, Montserrat, Potts, Simon, Power, Eileen, 2025

2025 Updates to 1-800-PENN-IPM Sweet Corn Line, Grab, Heather, 2025

Postharvest Drying and Curing Affect Cannabinoid Contents and Microbial Levels in Industrial Hemp (Cannabis sativa L.)
Plants, Baek, Yousoon, Grab, Heather, Chen, Chang, 2025

Building a resilient organic hemp industry: Survey and focus groups assess research, extension, and education needs
Agrosystems, Geosciences and Environment, Moore, Virginia, Fratz, Emily, Baltensperger, David, Ellison, Shelby, Grab, Heather, Sosnoskie, Lynn, Suchoff, David, Vergara, Daniela, 2025

Global synthesis of apple pollination research highlights general pollen limitation and positive contributions of wild bees compared to honeybees
Journal of Applied Ecology, Eeraerts, Maxime, Grab, Heather, 2025

Non-Target Captures in Corn Pest Monitoring Programs, Grab, Heather, 2024

Herbivore and pollinator body size effects on strawberry fruit quality
PLoS One, Salzberg, Annika Leigh, Grab, Heather, Hale, Casey, Poveda, Katja, 2024

2024 Sweet Corn Trapping Updates, Grab, Heather, 2024

2024 Sweet Corn Trapping Reports for Produce Auction Kiosks, Grab, Heather, 2024

Early-season mass-flowering crop cover dilutes wild bee abundance and species richness in temperate regions: A quantitative synthesis
Journal of Applied Ecology, Riggi, Lea, Raderschall, CA, Fijen, TPM, Scheper, J, Smith, HG, Grab, Heather, 2024

Non-Invasive Detection of Nitrogen Deficiency in Cannabis sativa Using Hand-Held Raman Spectroscopy
Agronomy, Antoszewski, Graham, Guenther, James, Roberts, III, John, Adler, Mickal, Dalle Molle, Michael, Kaczmar, Nicholas, Miller, William, Mattson, Neil, Grab, Heather, 2024

Evaluating Propagation Techniques for Cannabis sativa L. Cultivation: A Comparative Analysis of Soilless Methods and Aeroponic Parameters
Plants, Weingarten, Matthew, Mattson, Neil, Grab, Heather, 2024

Agricultural landscape simplification affects wild plant reproduction indirectly through herbivore-mediated changes in floral display
Scientific Reports, Schroeder, Hayley, Salzberg, Annika, Grab, Heather, Crowther, Shea, Hale, Casey, Poveda, Katja, 2024

2024 Sweet Corn Trapping Reports, Bupp, Glen, Grab, Heather, Fronk, L, 2024

Agricultural soil legacy influences multitrophic interactions between crops, their pathogens and pollinators
Proceedings of the Royal Society B: Biological Sciences, Davis, Jules K., Cohen, Anna D., Getman-Pickering, Zoe L., Grab, Heather L., Hodgden, Blythe, Maher, Ryan M., Pelzer, Chris J., Rangarajan, Anu, Ryan, Matthew R., Ugine, Todd A., Thaler, Jennifer S., 2023

Phenotypic clines in herbivore resistance and reproductive traits in wild plants along an agricultural gradient
PLoS One, Schroeder, Hayley, Grab, Heather, Poveda, Katja, 2023

Spillover of chalkbrood fungi to native solitary bee species from non-native congeners
Journal of Applied Ecology, LeCroy, Kathryn, Krichilsky, Erin, Grab, Heather, Roulston, T’ai, Danforth, Bryan, 2023

Commercial Bombus impatiens colonies function as ecological traps for wild queens
Journal of Applied Ecology, Miller, Olivia, Hale, Casey, Richardson, Leeah, Sossa, David, Iverson, Aaron, McArt, Scott, Poveda, Katja, Grab, Heather, 2023

New York State Cannabis sativa L. Production Manual, Vergara, Daniela, Shelnutt, Savanna, Grab, Heather, Demetri, Andrew, Rice, Spenser, Barraco, III, Anthony, Boudinot, Garrett, Bridgen, Mark, Cala, Ali, Crawford, Jamie, others, None, 2023

To (Rent) Bees or Not to (Rent) Bees? An Examination of the Farmer's Question
AgEcon Search, Wilcox, Steven, Just, David, Gomez, Miguel, Lin Lawell, CY, Grab, Heather, 2023

Diverse landscapes but not wildflower plantings increase marketable crop yield
Agro-Ecosystems, McCullough, Christopher, Grab, Heather, Angelella, Gina, Karpanty, Sarah, Samtani, Jayesh, Olimpi, Elissa M., O'Rourke, Megan, 2022

Archetype models upscale understanding of natural pest control response to land-use change
Ecological Applications, Alexandridis, Nikolaos, Marion, Glenn, Chaplin-Kramer, Rebecca, Dainese, Matteo, Ekroos, Johan, Grab, Heather, Jonsson, Mattias, Karp, Daniel, Meyer, Carsten, O'Rourke, Megan, 2022

Effects of Cold Temperature and Acclimation on Cold Tolerance and Cannabinoid Profiles of Cannabis sativa L. (Hemp)
Horticulturae, Galic, Andrei, Grab, Heather, Kaczmar, Nicholas, Maser, Kady, Miller, William, Smart, Lawrence, 2022

Data from: Crop pests and predators exhibit inconsistent responses to surrounding landscape composition
National Academy of Sciences, Karp, Daniel, Chaplin-Kramer, Rebecca, Meehan, Timothy, Martin, Emily, DeClerck, Fabrice, Grab, Heather, Gratton, Claudio, Hunt, Lauren, Larsen, Ashley, Mart\'\inez Salinas, Alejandra, None, others, None, 2021

Functional traits linked to pathogen prevalence in wild bee communities
Scientific Reports, Figueroa, Laura, Compton, Sally, Grab, Heather, McArt, Scott, 2021

Landscape composition mediates the relationship between predator body size and pest control
Ecological Applications, Perez-Alvarez, Ricardo, Grab, Heather, Polyakov, Anthony, Poveda, Katja, 2021

Human-Mediated Land Use Change Drives Intraspecific Plant Trait Variation
Frontiers in Plant Science, Schroeder, Hayley, Grab, Heather, Kessler, Andre, Poveda, Katja, 2021

Models of natural pest control: Towards predictions across agricultural landscapes
Biological Control, Alexandridis, Nikolaos, Marion, Glenn, Chaplin-Kramer, Rebecca, Dainese, Matteo, Ekroos, Johan, Grab, Heather, Jonsson, Mattias, Karp, Daniel, Meyer, Carsten, O'Rourke, Megan, others, None, 2021

Landscape Composition and Fungicide Exposure Influence Host-Pathogen Dynamics in a Solitary Bee
Environmental Entomology, Krichilsky, Erin, Centrella, Mary, Eitzer, Brian, Danforth, Bryan, Poveda, Katja, Grab, Heather, 2021

Landscape simplification shapes pathogen prevalence in plant-pollinator networks
Ecology Letters, Figueroa, Laura L., Grab, Heather, Ng, Wee Hao, Myers, Christopher R., Graystock, Peter, McFrederick, Quinn S., McArt, Scott H., 2020

The effectiveness of flower strips and hedgerows on pest control, pollination services and crop yield: a quantitative synthesis
Ecology Letters, Albrecht, Matthias, Kleijn, David, Williams, Neal, Tschumi, Matthias, Blaauw, Brett, Grab, Heather, 2020

The Bee Community of Cannabis sativa and Corresponding Effects of Landscape Composition
Environmental Entomology, Flicker, Nathaniel, Poveda, Katja, Grab, Heather, 2020

Agriculturally dominated landscapes reduce bee phylogenetic diversity and pollination services
Science, Grab, Heather, Branstetter, Michael, Amon, Nolan, Urban-Mead, Katherine, Park, Mia, Gibbs, Jason, Blitzer, Eleanor, Poveda, Katja, Loeb, Greg, Danforth, Bryan, 2019

A global synthesis reveals biodiversity-mediated benefits for crop production
Science advances, Dainese, Matteo, Martin, Emily, Aizen, Marcelo, Albrecht, Matthias, Bartomeus, Ignasi, Grab, Heather, 2019

Habitat enhancements rescue bee body size from the negative effects of landscape simplification
Journal of Applied Ecology, Grab, Heather, Brokaw, Julia, Anderson, Elisabeth, Gedlinske, Lauren, Gibbs, Jason, Wilson, Julianna, Loeb, Greg, Isaacs, Rufus, Poveda, Katja, 2019

Viral transmission in honey bees and native bees, supported by a global black queen cell virus phylogeny
Environmental Microbiology, Murray, Elizabeth, Burand, John, Trikoz, Natalia, Schnabel, Julia, Grab, Heather, Danforth, Bryan, 2019

Landscape context shifts the balance of costs and benefits from wildflower borders on multiple ecosystem services
Proceedings of the Royal Society B: Biological Sciences, Grab, Heather, Poveda, Katja, Danforth, Bryan, Loeb, Greg, 2018

Landscape simplification reduces classical biological control and crop yield
Ecological Applications, Grab, Heather, Danforth, Bryan, Poveda, Katja, Loeb, Greg, 2018

Temporally dependent pollinator competition and facilitation with mass flowering crops affects yield in co-blooming crops
Scientific Reports, Grab, Heather, Blitzer, Eleanor, Danforth, Bryan, Loeb, Greg, Poveda, Katja, 2017

Responses of crop pests and natural enemies to wildflower borders depends on functional group
Insects, McCabe, Ellie, Loeb, Gregory, Grab, Heather, 2017

A global synthesis of the effects of diversified farming systems on arthropod diversity within fields and across agricultural landscapes
Global Change Biology, Lichtenberg, Elinor, Kennedy, Christina, Kremen, Claire, Batary, Peter, Berendse, Frank, Grab, Heather, 2017

Landscape simplification constrains adult size in a native ground-nesting bee
PLoS One, Renauld, Miles, Hutchinson, Alena, Loeb, Gregory, Poveda, Katja, Grab, Heather, 2016

Field evaluation of an oviposition deterrent for management of spotted-wing drosophila, Drosophila suzukii, and potential nontarget effects
Journal of Economic Entomology, Wallingford, Anna, Grab, Heather, Dore Brind'Amour, Gabrielle, Boucher, Matthew, Mafra-Neto, Agenor, Loeb, Greg, 2016

Landscape simplification decreases wild bee pollination services to strawberry
Agriculture, Ecosystems & Environment, Grab, Heather, Poveda, Katja, Loeb, Gregory, 2015