Laboratory Tests of Diflubenzuron and Four Analogues Against the Pink Bollworm and a Field Cage Test with Diflubenzuron and EL-494 for Control of the Pink Bollworm and Cotton Leafperforator

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In laboratory tests, diflubenzuron (N-[[(4-chlorophenyl)amino] carbonyl]-2,6-difluorobenzamide) (AB-29054), EL-494 (N-[[(5-( 4-bromophenyl)-6-methyl-2-pyrazinyl]amino]carbonyl]-2 ,6- dichlorobenzamide), EL-588 (2,6-dichloro-N-[[[5-( 4-chlorophenyl)-2-pyrazinyl]amino]carbonyl-]benzamide), A13-63220 (N- [[(4-bromophenyl)amino]carbonyl]-2,6-difluorobenzamide), and A13-63223 (2,6-difluoro-N-[[(4-(trifluoromethyl)phenyl]amino]carbonyl]benzamide) prevented development of adult pink bollworms, Pectinophora gossypiella (Saunders) when they were fed in larval diet at 1–10 ppm. Contact experiments with adult moths indicated little activity at up to 18 mg/cm2 except for AI3-3220 and AI3-63223 which caused significant mortality after a 1-wk exposure to treated cage surfaces. Diflubenzuron and EL-494 were tested for systemic activity by treating foliage of cotton plants at rates up to 15.2 mg/plant without effect on subsequent development of the pink bollworm. A further test in field cages using the 2 compounds at a rate of 0.11 kg/ha indicated that diflubenzuron was superior to EL-494 for control of the cotton leafperforator, Bucculatrix thurberiella Busck, but neither compound had any activity against the pink bollworm.

Document Type: Research Article

Publication date: August 1, 1978

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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.
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