| John Losey
Professional Overview and ObjectivesMy program has two complementary foci the management of pest insect populations and the management of endangered or declining insect populations. My program in pest management focuses on the ecological impacts of transgenic crops for insect control. Since I specialize in field crops, I have narrowed that focus further to Bt-corn including both Btk (for lepidopteran pests) and Btt (for coleopteran pests). Ecological impacts can include both impacts on the target pest population (eg resistance) and impacts on nontarget organisms (eg monarchs and beneficial beetles). My research with Bt-corn focuses on evaluating these problems and identifying potential solutions. One group of beneficial beetles that may be impacted by Btt corn is the coccinellidae or lady beetles. This group includes many predators that are vital for the suppression of pest populations. Unfortunately, many of the most common lady beetles native to the United States are in precipitous decline. My research in insect conservation biology focuses on the assessment of the current status of both native and exotic lady beetles and the determination of the impact of recent trends in the composition of lady beetle species (e.g. a higher proportion of exotic species and individuals) on the ability of this group to suppress pest populations. Education
Publications
Losey, J. and M. Vaughan. 2008. Conserving the ecological services provided by insects. American Entomologist 54: 113-115. Vaughan, M., F. Kuehn, J. Losey, and S. Black. 2008. Conservation of insects. 54: 96-97. Shuler, R.E., A. DiTommaso, J.E. Losey, and C.L. Mohler. 2008. Postdispersal weed seed predation is affected by experimental substrate. Weed Science 56: 889-895. Losey, J.E., J.E. Perlman, and R. Hoebeke. 2007. Citizen scientist rediscovers rare nine-spotted lady beetle, Coccinella novemnotata, in eastern North America. Journal of Insect Conservation. 04 March 2007 (10.1007/s10841-007-9077-6). Fuchsberg, J.R., T.-H. Yong, J.E. Losey, M.E. Carter, and M.P. Hoffmann. 2007. Evaluation of corn leaf aphid (Rhopalosiphum maidis; Homoptera: Aphididae) honeydew as a food source for the egg parasitoid Trichogramma ostriniae (Hymenoptera: Trichogrammatidae). Biological Control 40(2): 230-236. Hayden, V.R., J.M. Duxbury, A. DiTommaso, and J.E. Losey. 2007. Weed Community Dynamics in the System of Rice Intensification (SRI) and the Efficacy of Mechanical Cultivation and Competitive Rice Cultivars for Weed Controlin Indonesia. J. Sustainable Ag. 30:5-26. Losey, J.E. and M.Vaughn. 2006. The economic value of ecological services provided by insects. (accepted in BioScience – scheduled for publication in 4/06) Losey, J.E., D.D. Calvin, M.E. Carter, C.E. Mason. 2001. Evaluation of non-corn host plants as a refuge in a resistance management program for European corn borer (Lepidoptera: Crambidae) on Bt-corn. Environmental Entomology 30:728-735.
Obrycki, J.J., J.E. Losey, O. Taylor, & L.C. Hansen. 2001. Transgenic insecticidal corn: Beyond insecticidal toxicity to ecological complexity. BioScience 51:353-361.
Stanley-Horn, D.E., G.P. Dively, R.L. Hellmich, H.R. Mattila, M.K. Sears, R. Rose, L.C.H. Jesse, J.E. Losey, J.J. Obrycki, and L. Lewis. 2001. Assessing the impact of Cry1Ab-expressing corn pollen on monarch butterfly larvae in field studies. Proceedings of the National Academy of Sciences 98: 11931-11936
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