Toxic and Antifeedant Effects of Allyl Disulfide on Tribolium castaneum (Coleoptera: Tenebrionidae) and Sitophilus zeamais (Coleoptera: Curculionidae)
Authors: Chiam, Wan Yee; Huang, Yan; Chen, Shao Xing; Ho, Shuit Hung
Source: Journal of Economic Entomology, Volume 92, Number 1, February 1999 , pp. 239-245(7)
Publisher: Entomological Society of America
Abstract:Toxicity and antifeedant activity of allyl disulfide, a volatile compound from garlic, Allium sativum L., to adults and larvae of Tribolium castaneum (Herbst) and adults of Sitophilus zeamais Motschulsky were investigated. Topical application was used for contact toxicity, filter paper impregnation for fumigant toxicity, and a flour disk bioassay for antifeedant activity. The filter paper impregnation bioassay also was used to study the effects on egg hatch and the subsequent progeny emergence of T. castaneum. Adult T. castaneum were more susceptible to allyl disulfide than adult S. zeamais in both toxicity tests. Allyl disulfide was 3 times more potent to T. castaneum adults than to S. zeamais in contact toxicity tests, with LD50s of 7.16 and 22.47 μg/mg insect, respectively. In the fumigant bioassay, allyl disulfide was ≈5 times more effective to the adults of T. castaneum than to S. zeamais, with LC50 values of 0.030 and 0.146 μmg/cm2, respectively. The larvae of T. castaneum were more tolerant of allyl disulfide treatment than the adults in both toxicity tests. Egg hatching and subsequent progeny emergence from treated eggs were reduced with increasing concentrations. Allyl disulfide was a more potent antifeedant to T. castaneum adults than either T. castaneum larvae or S. zeamais adults. A concentration of 7.43 mg/g of food deterred feeding by 85.7% among the T. castaneum adults, but feeding was deterred only by 31.5% at 12.77 mg/g of food and 21.2% at 29.15 mg/g of food for T. castaneum larvae and S. zeamais adults, respectively.
Document Type: Research Article
Publication date: February 1, 1999
- 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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