Toxicity, antifeedant, egg hatchability and adult emergence effect of Piper nigrum L. and Jatropha curcas L. extracts against rice moth, Corcyra cephalonica (Stainton)

Dynamic Chiropractic

关键词: Antifeedant;    feeding deterrence;    Jatropha curcas;    Piper nigrum;    Corcyra cephalonica;    egg hatchability;    adult emergence.;   

学科分类：医学（综合）

来源: MPA Media

【 摘 要 】

Petroleum ether extract of black pepper,Piper nigrumand physic nut,Jatropha curcaswere shown to have insecticidal efficacies against rice moth,Corcyra cephalonica(Stainton). TheC. cephalonica3rdinstar larvae were shown to have similarities susceptibility to petroleum ether extract ofPiper nigrumandJ. curcaswith LC50values of 12.52 and 13.22 µL/ml, respectively. In a bioassay using no-choice tests, the parameters used to evaluate antifeedant activity were relative growth rate (RGR), relative consumption rate (RCR), efficiency on conversion of ingested food (ECI) and grain protection or feeding deterrence indices (FDI). Both extracts showed high bioactivity at all doses againstC. cephalonicalarvae and antifeedant action was increased with increasing plant extract concentrations. The petroleum ether extract ofP. nigrumandJ. curcasshowed strong inhibition on egg hatchabilities and adult emergence ofC. cephalonicaat the lowest concentration. Based on the results of this study, petroleum ether extracts ofP. nigrumandJ. curcascould be used in IPM program for rice moth.

【 授权许可】

Unknown