Consumption of leaflets dipped in aqueous solutions containing the chitin synthesis inhibitor 1-(3,5-dichloro-2, 4-difluorophenyI)-3-(2,6-difluorobenzoyI)-urea (CME- 13406) caused 94% cumulative mortality after 5 d to Leptinotarsa decemlineata (Say) third instars at half field rate (7 mg active ingredient [AI]/liter). Larvae given all but the weakest dosage of CME-13406 (0.44 mg [AI]/liter) consumed less foliage than untreated larvae. Amounts of foliage consumed by adults or total number of eggs laid per female did not differ among treatments. Egg viability was reduced in newly emerged adults for 7 dafter they consumed leaflets treated with 14.0 mg (AI)/liter (field rate) for 48 h. An average of 65% of eggs of untreated females hatched. Average percentage hatch of eggs of females treated with 140, 70, 14, and 7 mg (AI)/liter was 10, 8, 31, and 36%, respectively. All but the lowest dosage caused reduced hatch. Mean number of progeny per female for untreated females and those with 140, 70,14, and 7 mg (AI)/liter was 136.4, 15.9, 14.1,46.0, and 60.3, respectively. All treated females produced fewer progeny than untreated females. The compound had no apparent effect on host plant acceptance by adult beetles.
Document Type: Research Article
Publication date: April 1, 1988
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Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.