Laboratory toxicity of insecticide residues to Orius insidiosus, Geocoris punctipes, Hippodamia convergens, and Chrysoperla carnea

Adults obtained from laboratory cultures of the insidious flower bug, Orius insidiosus (Say), big-eyed bug, Geocoris punctipes (Say), convergent lady beetle, Hippodamia convergens Guerin-Meneville, and green lacewing, Chrysop erla carnea Stephens, were exposed to ten insecticides, including four newe r insecticides with novel modes of action, using a spray chamber bioassay. There was considerable variation in response among the species tested to th e insecticides. In general, malathion was more toxic than other insecticide s to all species. Chrysoperla carnea was highly sensitive to most of the in secticides. One-half of the insecticides caused no mortality in G. punctipe s; O. insidiosus and H. convergens were more sensitive. Spinosad was less t oxic than other insecticides tested on all species.