The influence of post-exposure temperature on the toxicity of insecticides to Ostrinia nubilalis (Lepidoptera: Crambidae).
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.
Musser
Fred R
FR
Department of Entomology, Cornell University, New York State Agricultural Experiment Station, 630 W North St, Geneva, NY 14456, USA. fm61@msstate.edu
Shelton
Anthony M
AM
D000818:Animals; D004338:Drug Combinations; D007306:Insecticides; D007814:Larva; D007915:Lepidoptera; D018942:Macrolides; D008724:Methomyl; D009570:Nitriles; D011722:Pyrethrins; D013696:Temperature
D004338:Drug Combinations; D007306:Insecticides; D018942:Macrolides; D009570:Nitriles; D011722:Pyrethrins; D008724:Methomyl; C099952:bifenthrin; C037304:cyhalothrin; C415329:spinosad