Katie A. Ellis, kag298@psu.edu and Dennis D. Calvin, ifa@psu.edu. Penn State University, Department of Entomology, 501 ASI Bldg, University Park, PA
The oviposition choices of European corn borer females have a substantial impact on the management decisions of corn growers. Female movement also plays a major role in resistance management modeling for transgenic corn. Female discrimination between host plant maturities has been shown in previous studies; however, these studies have not investigated the spatial scale of female choice. Internally dyed female moths were released in a hexagonal field in central Pennsylvania throughout the growing seasons of 2004 and 2005. Three planting dates were assigned to the field in a split-plot design. Egg mass deposition was quantified in the available plant stages. Egg mass counts were analyzed for effects of distance from the release point and directionality. Our data showed host maturity preferences similar to prior studies. Directional movement was not significant. The small numbers of egg masses observed in the field also suggest that the spatial scale of future studies should be expanded.
Species 1: Lepidoptera Crambidae
Ostrinia nubilalis (European corn borer)
Keywords: Female dispersal, Moth movement