Larry Hull, Ph.D.

Larry Hull, Ph.D.

  • Professor Emeritus of Entomology
Fruit Research & Extension Center
PO Box 330

Biglerville, PA 17307-0330


  • B.S., Mount St. Mary's College, 1972
  • Ph.D., Penn State University, 1977

Graduate Students:

Eric Bohnenblust
Neelendra Joshi

Department Focus Areas:

Ecological Applications

Research Interests :

Biology and management of arthropod pests and natural enemies on deciduous tree fruit crops; pesticide resistance management; pheromone mating disruption; evaluation of insecticides/acaricides/biologicals.


Implementation of integrated pest management programs for deciduous tree fruit programs; control strategies and tactics for deciduous tree fruit pests.

Research Activities & Interests:

Research programs include understanding, monitoring, and managing resistance in various pests of apples; evaluating alternative non-pesticidal management tactics for fruit pests including ground cover management and pheromone mating disruption; evaluating natural enemies as biological control agents; studying the influence of insect/mite damage on fruit tree productivity; developing sampling schemes for monitoring both pest and natural enemy populations; and evaluating experimental and registered insecticides and acaricides for inclusion in fruit integrated pest management programs.

Extension Activities & Interests:

Extension programs include developing expert systems for grower use; implementing integrated pest management programs for deciduous tree fruits; and providing information and recommendations for the control of deciduous tree fruit pests.

Relevant Publications:

Hull, L. A., E. H. Beers. Validation of injury thresholds for European red mite (Acari: Tetranychidae) on 'Yorking' and 'Delicious' apple. J. Econ. Entomol. 83(5):2026-2031 (1990).

Hull, L. A., B. A. Barrett, E. G. Rajotte. Foliar persistence and effect of fenoxycarb on Platynota idaeusalis (Lepidoptera: Tortricidae) on apple. J. Econ. Entomol. 84(3):965-970 (1991).

Knight, A. L., L. A. Hull. Linking insecticide bioassays with residue analyses to evaluate control of Platynota idaeusalis (Lepidoptera: Tortricidae) neonates on apple: II. seasonal spray program. J. Econ. Entomol. 85(3):932-938 (1992).

Biddinger, D. J., L. A. Hull. Effects of several types of insecticides on the mite predator Stethorus punctum (Coleoptera: Coccinellidae), including insect growth regulators and abamectin. J. Econ. Entomol. 88(2):358-366 (1995).

Beers, E. H., L. A. Hull. Dry matter partitioning of nonbearing apple trees following injury by European red mite (Acari Tetranychidae). J. Econ. Entomol. 88(4):998-1003 (1995).

Felland, C, M., D. A. J. Teulon, L. A. Hull, D. F. Polk. Distribution and management of thrips (Thysanoptera: Thripidae) on nectarine in the mid-Atlantic region. J. Econ. Entomol. 88(4):1004-1011 (1995).

Biddinger, D. J., L. A. Hull, B. A. McPheron. Cross-resistance and synergism in azinphosmethyl resistant and susceptible strains of tufted apple bud moth (Lepidoptera: Tortricidae) to various insect growth regulators and abamectin. J. Econ. Entomol. 89(2):274-287 (1996).

Felland, C, M., L. A. Hull. Overwintering of Stethorus punctum punctum (Coleoptera: Coccinellidae) in apple orchard ground cover. Environ. Entomol. 25(5):972-976 (1996)

Hull, L. A., B. A. McPheron, A. M. Lake. Insecticide Resistance Management and Integrated Mite Management in Orchards: Can They Coexist? Pestic. Sci. 51:359-366 (1997).

Barden, C. L., L. A. Hull. Storage quality of apples following natural and artificial tufted apple bud moth feeding injury. HortScience 33(5):872-877 (1998).

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