The influence of post-exposure temperature on the toxicity of insecticides to Ostrinia nubilalis (Lepidoptera: Crambidae) |
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Authors: | Musser Fred R Shelton Anthony M |
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Affiliation: | Department of Entomology, Cornell University, New York State Agricultural Experiment Station, 630 W North St, Geneva, NY 14456, USA. fm61@msstate.edu |
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Abstract: | The influence of post-treatment temperature on the toxicities of two pyrethroids (lambda-cyhalothrin and bifenthrin), a carbamate (methomyl) and a spinosyn (spinosad) to Ostrinia nubilalis (Hubner) larvae was evaluated in laboratory assays. From 24 to 35 degrees C, the toxicities of the pyrethroids decreased 9.5- and 13.6-fold while spinosad toxicity decreased 3.8-fold. The toxicity of methomyl did not change significantly. The results demonstrate that the most effective insecticide against a pest may vary with environmental conditions. In situations where comparable products from multiple insecticide classes are available, temperature should be included as a factor in the decision-making process. |
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Keywords: | toxicity insecticide pyrethroid spinosyn carbamate temperature coefficient European corn borer Ostrinia nubilalis |
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