Dave Biddinger, Ph.D.

  • Tree Fruit Research Entomologist
  • Research Professor
Dave Biddinger, Ph.D.
Fruit Research & Extension Ctr.
PO Box 330

Biglerville, PA 17307-0330
Work Phone: 717-677-6116


  1. B.S., Michigan State University, 1984
  2. M.S., Michigan State University, 1989
  3. Ph.D., Penn State University, 1993

Areas of Specialization:

Integrated Pest Management + (Biodiversity/Ecotoxicology Partners)

Research Activities & Interests:

My research focuses on developing integrated pest management programs in tree fruits that utilize selective insecticides (i.e., IGR's, Bt's, pheromone disruption) to control lepidopteran pest species while promoting biological control of secondary pests. Orchard ecology research programs with Penn State and other universities have been conducted over the last three years in large plot blocks of apples to examine changes in pest and beneficial arthropod diversity and abundance. Other areas of research are field evaluation of experimental and registered insecticides and acaricides for control of tree fruit pests and examining current levels of resistance and the potential for cross resistance in new compounds and types of chemistry; laboratory evaluation of IGR's on stage specificity and sublethal effects on reproduction in leafrollers; and identification and biology of leafhopper parasitoids in tree fruits.

Relevant Publications:

Sun, X., B. A. Barrett & D. J. Biddinger. Changes in fecundity and fertility reductions in adult leafrollers exposed to surfaces treated with the ecdysteroid agonists tebufenozide and methoxyfenozide. (Entomologia Experimentalis et Applicata, accepted Nov. 1999).

Biddinger, D. J. & L. A. Hull. 1999. Sublethal effects of selected insecticides on growth and reproduction of a laboratory susceptible strain of tufted apple bud moth (Lepidoptera: Tortricidae). J. Econ. Entomol. 92(2): 314-324.

Biddinger, D. J., L. A. Hull & E. G. Rajotte. 1998. Stage specificity of various insecticides to tufted apple bud moth larvae. J. Econ. Entomol. 91(1): 200-208.

Biddinger, D. J., L. A. Hull, and B. McPheron. 1996. Cross-resistance and synergism of azinphosmethyl resistant and susceptible strains of tufted apple bud moth (Lepidoptera: Tortricidae) to various insect growth regulators and abamectin. J. Econ. Entomol. 89: 274-287.

Biddinger, D. J. & L. A. Hull. 1995. Effects of several types of insecticides on the mite predator, Stethorus punctum (Coleoptera: Coccinellidae), including insect growth regulators and abamectin. J. Econ. Entomol. 88: 358-366.

Cox, D. L. , A. L. Knight, D. J. Biddinger, J. A. Lasota, B. Pikounis, L. A. Hull, & R. A. Dybas. Toxicity and field efficacy of avermectins against codling moth (Lepidoptera: Tortricidae) on apples. J. Econ. Entomol. 88: 708-715.

Felland, C. M., D. J. Biddinger, & L. A. Hull. 1995 Overwintering emergence and trapping of adult Stethorus punctum (Coleoptera: Coccinellidae) in Pennsylvania apple orchards. Environ. Entomol. 24: 110-115..

Biddinger, D. J., C. M. Felland & L. A. Hull. 1994. Parasitism of tufted apple bud moth (Lepidoptera: Tortricidae) in conventional insecticide and pheromone-treated Pennsylvania apple orchards. Environ. Entomol. 23: 1568-1579.

Hunter, M., D. J. Biddinger, E. J. Carlini, B. A. McPheron & L. A. Hull. 1994. Effects of the apple leaf allelochemistry,on tufted apple bud moth (Lepidoptera: Tortricidae) resistance to azinphosmethyl. J. Econ. Entomol. 87: 1423-1429.

Biddinger, D. J., W. Roelofs, and A. J. Howitt. 1994. The development of a sex pheromone lure of the American plum borer, Euzophera semifuneralis (Walker) (Lepidoptera: Pyralidae), a major pest of cherries in Michigan. Great Lakes Entomol. 26(3): 311-317.

Biddinger, D. J.1993.Toxicity, stage specificity, and sublethal effects of abamectin and several classes of insect growth regulators to Platynota idaeusalis (Lepidoptera:Tortricidae) and Stethorus punctum (Coleoptera: Coccinellidae). Ph. D Thesis, Penn State University. 193 pp.

Biddinger, D.J. and A.J. Howitt. 1992.The foodplants and distribution of the American plum borer (Lepidoptera: Pyralidae).Great Lakes Entomol. 25(3): 149-158

Research Interests

Pollinator Biology, Health and Ecology
Honey Bee and Pollinator Research

Dr. Biddinger is working on the conservation of wild populations of Osmia Orchard Bees as supplements to honey bees for orchard pollination and is developing managed populations with Jim and Maryann Frazier.  He has been examining the effects of orchard pesticides on non-Apis pollen bees and developing their use as bioindicators of ecological health in ecologically based IPM programs in apple using only reduced-risk and bio-pesticides for 2 seasons. He is collaborating with the Pennsylvania Department of Agriculture in their survey efforts to develop the first checklist of Pennsylvania bees and in understanding the natural history and importance of the many species of bees found in fruit orchards.