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Laboratory Toxicity of Insecticide Residues to Orius Insidiosus, Geocoris Punctipes, Hippodamia Convergens, and Chrysoperla Carnea

G. W. Elzen, P. J. Elzen and E. G. King


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, Chrysoperla carnea Stephens, were evaluated in spray chamber bioassays to ten insecticides, including four newer insecticides with novel modes of action. There was considerable variation in response among the species tested to the insecticides. In general, malathion was more toxic than other insecticides to all species. Chrysoperla carnea was highly sensitive to most of the insecticides. One-half of the insecticides caused no mortality in G. punctipes; O. insidiosus and H. convergens were more sensitive. Spinosad was more favorably selective than other insecticides tested on all species.

Reprinted from Proceedings of the 1998 Beltwide Cotton Conferences pp. 1235 - 1238
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998