期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 72, 期 4, 页码 1156-1162出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2008.02.005
关键词
Dysoxylum; Triterpenes; Antifeedant; Deterrence; Toxicity; Leaffolder; Biology; Weight; Oviposition
资金
- Rural Development Administration, NICS
Treatment of Dysoxylum pure triterpenes 3 beta,24,25-trihydroxycycloartane and beddomei lactone to the rice leaffolder (RLF), Chaphalocrocis medinalis (Guenee) (Lepidoptera: Pyralidae), resulted in prolonged larval duration and reduced larval weight. In leaf cut choice assay and topical application experiments, beddomei lactone and 3 beta,24,25-trihydroxycycloartaneto showed strong antifeedant and growth inhibitor activity against fourth instar larvae of C medinalis. Also average leaf consumption was decreased (89%) by the treatment of the two terpinoids when compared with controls. Number of eggs laid by the female (fecundity) was decreased and oviposition deterrence index was increased due to the treatment. This result further shows that the pure triterpenes of Dysoxylum act as both an antifeedant and chronic toxin to the rice leaffolder larvae. (C) 2008 Elsevier Inc. All rights reserved.
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