Comparison of Three Fenitrothion Controlled-release Formulations as Larvicides for Aedes aegypti (L.) (Diptera: Culicidae)

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Abstract:

Three polyvinyl chloride (PVC) formulations of fenitrothion were prepared and tested as controlled-release plastic pellets against Aedes aegypti (L.) larvae. Based on both T50(capacity to kill 50% of the larvae after 24 h exposure) and T90(capacity to kill 90% of the larvae by the end of the experiment), the nonexpanded formulation (PVC + dioctyl phthalate + fenitrothion) was more effective than either the expanded formulation (PVC + dioctyl phthalate + triton X-100 + fenitrothion) or the foamed formulation (PVC + diocytyl phthalate + triton X-100 + ammonium carbonate + citric acid + water + fenitrothion). The addition of a surfactant (triton X-100 or a surfactant (triton X-100) plus a blowing agent (CO2, produced by the reaction of citric acid with ammonium carbonate) may have increased the amount of fenitrothion released per unit time compared with the nonexpanded formulation.

Document Type: Research Article

Publication date: December 1, 1985

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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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