Gas-propelled aerosols and micronized dusts for control of insects in aircraft. 8. Toxicity of micronized dusts to some greenhouse insects.
In this final part of a series of reports on tests of insecticides for the control of insects in aircraft [cf. preceding five abstracts], work with greenhouse pests is recorded. When micronised dusts of Mobam (benzo[b]thien-4-yl methylcarbamate), Dursban (chlorpyrifos) or resmethrin were dispersed in greenhouses in Maryland in 1970 by the release of carbon dioxide, they proved to be highly effective against several representative insects of quarantine interest, including nymphs of Planococcus citri (Risso), adults of Liriomyza munda Frick, adults and nymphs of Myzus persicae (Sulz.), adults and nymphs of Macrosiphoniella sanborni (Gill.), nymphs of Melanoplus spp. (mainly M. differentialis (Thos.)) and adults of Popillia japonica Newm. Mobam killed adults of Udea rubigalis (Gne.) and Platynota stultana (Wlsm), but not adults of Trialeurodes vaporariorum (Westw.), adults and immature stages of Tetranychus urticae Koch or adults and immature stages of T. cinnabarinus (Boisd.). Dursban killed susceptible spider mites but not resistant ones and did not kill adults of Trialeurodes. Resmethrin was highly effective against T. vaporariorum and susceptible spider mites.