Areas of Expertise
Integrated pest management, biological control, sampling and decision making, risk assessment, population ecology, invasive species
The goal of my research is to develop the tools required for biologically-based management of arthropods in horticultural crops. I work towards this goal along three programmatic thrusts; biological control, pest control decision making, and quantitative population ecology. My biological control research focuses on improving the effectiveness of natural enemies in selected cropping systems. This is exemplified through my research on plant habitat mediated mite predator-prey and whitefly-predator dynamcis. In this work I have asked what characterizes a successful mite biological control agent, how crop management practices can be modified to encourage biological control, and how tri-trophic interactions mediate biological control. Pest control decision making is one of the foundations of pest management and this research addresses tools for measuring pest abundance, understanding pest impact on crops, and risk assessment for non-indigenous species. Currently I am working collaboratively to prepare a second edition of a book on this topic. In addition to my research I also have a strong commitment to teaching. I currently teach, in collaboration with Ann Hajek, a course entitled "Invasions" which addresses the biological, economic and philosophical aspects of species invasions.
ENTOM 2020 Invasions (co-taught with A. Hajek)
Publications (last 5 years)
- Gardner, J., Hoffmann, M. P., Pitcher, S., Nyrop, J. P. 2012. Recurrent warming to improve cold storage of Trichogrammatids (Hymenoptera: Trichogrammatidae). Biocontrol Science & Technology.
- Szczepaniec A, S. F. Creary, K. L. Laskowski, J. P. Nyrop and M. J.Raupp. 2011. Neonicotinoid insecticide imidacloprid causes outbreaks of spidermites on elm trees in urban landscapes. PLoS ONE 6(5): e20018.doi:10.1371/journal.pone.0020018
- Ugine, T. A., J. P. Sanderson, S. P. Wraight, L. Shipp, K. Wang and J.P. Nyrop. 2011. Binomial sampling of western flower thrips infesting flowering greenhouse crops using incidence-mean models. Environ. Entomol. 40:381-390.
- Lee, D. H., J. P. Nyrop and J P. Sanderson. 2011. Avoidance of natural enemies by adult whiteflies, Bemisia argentifolii, and effects on host plant choice. Biological Control. 58:302–309.
- B. A. Nault, B. P. Werling, R. W. Straub, and J. P. Nyrop. 2011. Delaying onion planting to control onion maggot (Diptera: Anthomyiidae): efficacy and underlying mechanisms. J.Econ. Entomol. 104:1622-1632.
- Loughner R, Wentworth K, Loeb G, Nyrop J. 2010. Influence of leaf trichomes on predatory mite density and distribution in plant assemblages and implications for biological control. Biological Control, 54, 255-262.
- Sarvary, M.A., Nyrop, J., Reissig, H. 2010. Effects of natural enemies and host plants in wild and orchard habitats on obliquebanded leafrollers (Lepidoptera: Tortridicae) larval survival. Ecological Entomology, 55 (2), 110-117.
- Agnello, A. M., A. Atanassov, J. C. Bergh, D. J. Biddinger, L. J. Gut, M. J. Haas, J. K. Harper, H. W. Hogmire, L. A. Hull, L. F. Kime, G. Krawczyk, P. S. McGhee, J. P. Nyrop, W. H. Reissig, P. W. Shearer, R. W. Straub, R. T. Villanueva, and J. F. Walgenbach 2009. Reduced-risk pest management programs for eastern U.S. apple and peach orchards: a 4-year regional project. Amer. Entomol. 55:184-197.
- Loughner R, Wentworth K, Loeb G, Nyrop J 2009 Leaf trichomes influence predatory mite densities through dispersal behavior. Entomol Exp Appl 134:78-88
- Lee, Doo-Hyung, Nyrop, J. P., Sanderson, J. P. 2009. Attraction of Trialeurodes vaporariorum and Bemisia argentifolii to eggplant, and its potential as a trap crop for whitefly management on greenhouse poinsettia. Entomol. Exp. Appl. 133: 105–116
- Loughner R ; Goldman K ; Loeb G ; Nyrop J. 2008 Influence of leaf trichomes on predatory mite (Typhlodromus pyri) abundance in grape varieties. Experimental and Applied Acarology 45:111-122
- Luczynski A, Nyrop JP, Shi A 2008 Pattern of female reproductive age classes in mass-reared populations of Phytoseiulus persimilis (Acari: Phytoseiidae) and its influence on population characteristics and quality of predators following cold storage. Biological Control. 47:159-166