Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 1 of 1
Full-Text Articles in Agronomy and Crop Sciences
Effects Of Thiamethoxam Seed Treatments On Bean Leaf Beetles, Chelsea L. Piitz
Effects Of Thiamethoxam Seed Treatments On Bean Leaf Beetles, Chelsea L. Piitz
Department of Entomology: Dissertations, Theses, and Student Research
The increased use of thiamethoxam seed treatments for controlling target pests such as the bean leaf beetle, Cerotoma trifurcata (Forster), suggests the need for methods to measure and monitor the development of resistance to these insecticides. Overwintering and F1 bean leaf beetles were collected from alfalfa and soybean fields and used in early growth stage soybean studies to measure toxicity of thiamethoxam both in greenhouse experiments and laboratory bioassays involving exposure to treated foliage. Lethal and sub-lethal effects were detected in both greenhouse and lab bioassays. Lethal concentrations determined from laboratory assays were compared with residues determined from field grown …