Toxic and antifeedant effects of allyl disulfide on Tribolium castaneum (Coleoptera: Tenebrionidae) and Sitophilus zeamais (Coleoptera: Curculionidae)

被引:25
作者
Chiam, WY [1 ]
Huang, Y [1 ]
Chen, SX [1 ]
Ho, SH [1 ]
机构
[1] Natl Univ Singapore, Dept Biol Sci, Singapore 119260, Singapore
关键词
Coleoptera; garlic; contact toxicity; fumigant toxicity; growth inhibition; ovicide;
D O I
10.1093/jee/92.1.239
中图分类号
Q96 [昆虫学];
学科分类号
摘要
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 LD(50)s Of 7.16 and 22.47 mu g/mg insect, respectively. In the fumigant bioassay, allyl disulfide was approximate to 5 times more effective to the adults of T. castaneum than to S. zeamais, with LC50 values of 0.030 and 0.146 mu mg/cm(2), 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.
引用
收藏
页码:239 / 245
页数:7
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