Sublethal Effects of Permethrin on Pheromone Response and Mating of Male Pink Bollworm Moths12

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Abstract
Dosage-mortality studies with permethrin against males of Pectinophora gossypiella (Saunders) indicated that percent mortalities occurring 96 h after dosing were more stable and reliable as dosage-dependent responses than those which occurred at 48 h. Tests measuring percent mortality, percent prostration, and uncoordinated behavior for 12 days after dosing showed that, regardless of dosage, ca. 90% of the total mortality occurred in the first 96 h. Although prostrate and uncoordinated behavior were high in the first 96 h, it was negligible for the remaining time. Activation (wing fanning) responses by male survivors of 96-h LD50 and LD80 dosages of permethnn were reduced 0.5- to 0.05-fold as compared with controls over a range of gossyplure concentrations from 0.01 to 1.0 μg Mating experiments showed that 96-h LD50 and LD80 male survivors mated as frequently as controls when confined to small mating cages with three virgin females for a 7-day period.