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Laboratory bioassays were conducted to determine the toxicity of spiromesifen, a tetronic acid insecticide to eggs, nymphs, and adults of the sweetpotato whitefly, Bemisia tabaci (Gennadius) biotype ''B'', on melon and collard. Two field trails we also conducted to determine the efficacies of spiromesifen at four different rates (96, 112, 114, and/or 149g [AI]/ha) against B. tabaci on melon and collards...
Apparent parasitism of silverleaf whitefly,Bemisia argentifoliiBellows & Perring, byEncarsiaspp. andEretmocerusspp. was surveyed on several crop and weed species in southern Florida from 1990 to 1995. Apparent parasitism levels varied between crops, seasons, and years, but generally were high on okra and cotton among crops, lantana and Spanish needles among weeds.E. pergandiellaHoward was the...
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