Sublethal Effects of Two Insect Growth Regulators Applied to Larvae of Liriomyza trifolii (Diptera: Agromyzidae)

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Abstract:

The sublethal effects of applications of the insect growth regulators (IGR) methoprene or Ro 13-5223 (ethyl[2-p-phenoxyphenoxy)ethyllcarbamate) to Liriomyza trifolii (Burgess) were calculated. Numbers of viable eggs laid every 2 days, total viable eggs per female, and longevity were determined for adults that survived IGR applications as larvae. A sterility index, indicative of decreases in fecundity, was calculated; with this index, a value of 100 represents complete infertility. Sterility index values of 88.8 to 100.0 were obtained when these IGR were applied to third-stage female larvae. When applied to newly eclosed female larvae, only the highest dosage of methoprene produced high sterility. No viable eggs were deposited by females that were confined with adult males surviving treatments of methoprene as larvae. The potential uses of IGR for leafminer control are discussed.

Document Type: Research Article

Publication date: October 1, 1984

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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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