Abstract
Technical and commercial preparations of chlorobenzilate, azinphosmethyl, carbophenothion, ethion, and carbaryl were tested against larvae of Chrysopa rufilabris Burmeister two days after they molted to the third instar. The third larval stadium was significantly lengthened in individuals which survived topical treatment with azinphosmethyl, ethion, carbophenothion, and carbaryl, whereas chlorobenzilate and one-day-old residues of all commercial pesticides had little prolonging effect. The pupal stage was significantly prolonged by commercial ethion and ethion + oil as well as by topical applications of all technical pesticides except chlorobenzilate. Emergence was lowest among individuals topically treated with azinphosmethyl and carbaryl and highest with chlorobenzilate. In decreasing order, residues of commercial azinphosmethyl, carbaryl, ethion + oil, ethion, carbophenothion, and chlorobenzilate reduced the numbers of individuals surviving to adulthood.
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