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Evaluation of Larvadex, a New IGR for the Control of Pestiferous Flies on Poultry Ranches

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The triazine-type insect growth regulator Larvadex, or CGA-72662 (N-cyclopropy]- 1,3,5-triazine-2,4,6-triamine), was evaluated against domestic flies breeding in poultry manure. A 5% soluble concentrate formulation was diluted with water and sprayed onto manure surfaces, at rates of 0.4 and 0.8 g of AI per m2.

The lowe dosage yielded excellent control of Musca domestica (L.) larvae for a period of 4 weeks. It significantly inhibited emergence of adult flies from pupae resulting from larvae in treated plots for 9 weeks. Control of larvae of Fannia femoralis (Stein) found at low population densities was obtained for a period of 6 weeks, and the inhibition of adult emergence was suppressed significantly for about 5 weeks. When populations of Fannia were heavy, significant reduction in larval populations in the treated plots lasted for about 33 days, whereas significant inhibition of emergence was noted for only 13 days. This suggests that the efficacy of this material is possibly short lived when heavy density of F. femoralis exists.

At the higher rate (0.8 g/m2) applied twice, larvae of muscoid flies other than Fannia, and consisting primarily of M. domestica, were controlled for about 9 weeks, whereas inhibition of adult emergence was significantly reduced for 69 days after the second treatment. F. femoralis larvae were suppressed for about 4 weeks, whereas inhibition of emergence continued for about 9 weeks.

Larvadex provides control of larvae, but also shows delayed activity during transformation from larvae to pupae and pupae to adult. This IGR offers a practical option for the control of manure-breeding flies in poultry operations.

Document Type: Research Article

Publication date: June 1, 1983

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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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