Abstract
Indirect toxicity through feeding on insecticide-treated prey was determined for five insecticides at two concentrations each to larvae and adults of convergent lady beetle, Hippodamia convergens Guerin-Meneville. Endosulfan (0.375 and 0.75 g [AI]/liter), carbaryl (1.2 and 2.4 g [AI]/liter), phosmet (0.375 and 0.75 g [AI]/liter), methomyl (0.225 and 0.45 g [AI]/liter), and esfenvalerate (0.015 and 0.03 g [AI]/liter) were toxic to larvae and adults when convergent lady beetles were fed insecticide-treated yellow pecan aphids, Monelliopsis pecanis Bissell. Esfenvalerate was a fast-acting insecticide, killing all tested convergent lady beetle life stages 1 h after feeding on treated yellow pecan aphids. Carbaryl and phosmet were slow-acting insecticides, causing the greatest mortality after 48 h. Methomyl was the only insecticide that did not cause 100% mortality to adult convergent lady beetles 48 h after feeding on insecticide-treated yellow pecan aphids, at both rates tested.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
