Toxicity and behavioral effect of 3 β,24,25-trihydroxycycloartane and beddomei lactone on the rice leaffolder Cnaphalocrocis medinalis (Guenée) (Lepidoptera: Pyralidae)

Treatment of Dysoxylum pure triterpenes 3 β,24,25-trihydroxycycloartane and beddomei lactone to the rice leaffolder (RLF), Cnaphalocrocis medinalis (Guenée) (Lepidoptera: Pyralidae), resulted in prolonged larval duration and reduced larval weight. In leaf cut choice assay and topical application exp...

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Bibliographic Details
Published in:Ecotoxicology and environmental safety 2009-05, Vol.72 (4), p.1156-1162
Main Authors: Senthil-Nathan, Sengottayan, Choi, Man-Young, Seo, Hong-Yul, Paik, Chae-Hoon, Kalaivani, Kandaswamy
Format: Article
Language:English
Subjects:
Antifeedant
Biology
Deterrence
Dysoxylum
Leaffolder
Oviposition
Toxicity
Triterpenes
Weight
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Summary:Treatment of Dysoxylum pure triterpenes 3 β,24,25-trihydroxycycloartane and beddomei lactone to the rice leaffolder (RLF), Cnaphalocrocis medinalis (Guenée) (Lepidoptera: Pyralidae), resulted in prolonged larval duration and reduced larval weight. In leaf cut choice assay and topical application experiments, beddomei lactone and 3 β,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.
ISSN:0147-6513
1090-2414
DOI:10.1016/j.ecoenv.2008.02.005