! "#$%&’# ()*+ ,--...#$%&’#/()*+)0 Full Length Research Paper Toxicity, antifeedant, egg hatchability and adult emergence effect of Piper nigrum L. and Jatropha curcas L. extracts against rice moth, Corcyra cephalonica (Stainton) Mousa Khani 1,2 , Rita Muhamad Awang 2* , Dzolkhifli Omar 2 and Mawardi Rahmani 3 1 Cultivation and Development Department of Medicinal Plants Research Center, Institute of Medicinal Plants, ACECR, Karaj, Iran. 2 Department of Plant Protection, Faculty of Agriculture, University Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia. 3 Department of Chemistry, Faculty of Science, University Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia. Accepted 8 August, 2012 Petroleum ether extract of black pepper, Piper nigrum and physic nut, Jatropha curcas were shown to have insecticidal efficacies against rice moth, Corcyra cephalonica (Stainton). The C. cephalonica 3 rd instar larvae were shown to have similarities susceptibility to petroleum ether extract of Piper nigrum and J. curcas with LC 50 values 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 against C. cephalonica larvae and antifeedant action was increased with increasing plant extract concentrations. The petroleum ether extract of P. nigrum and J. curcas showed strong inhibition on egg hatchabilities and adult emergence of C. cephalonica at the lowest concentration. Based on the results of this study, petroleum ether extracts of P. nigrum and J. curcas could be used in IPM program for rice moth. Key words: Antifeedant, feeding deterrence, Jatropha curcas, Piper nigrum, Corcyra cephalonica, egg hatchability, adult emergence. INTRODUCTION The rice moth, Corcyra cephalonica (St.) is the major pests of stored commodities in the tropics (Lucas and Riudavets, 2002), Asia, South America and Africa (Allotey and Azalekor, 2000; Huang and Subramanyam, 2004). The larvae feed on rice, corn, cocoa, chocolate, dried fruit, biscuits, coffee and other seeds. The rice moth is a worldwide pest of stored foodstuffs. Control of these insects generally requires the use of chemical insec- ticides that are toxic to humans and domestic animals, and and also harmful to the environment (Coelho et al., 2007). In addition, the larvae while feeding, leaves silken threads and contaminate the grain by producing dense webbing containing their fecal material and cast skins. The webbing formed is noticeably dense and tough, adding to the damage caused (Ayyar, 1934; Allotey and Azalekor, 2000). For the control of stored produced insects, it is frequently safer to use plant materials with insecticidal, 12))%+*$’*0 (-,) 3&’ )’-40)’(&%$(&