Sublethal effect of physic nut wangi variety oil (Jatropha curcas L.) on Helicoverpa armigera Hubner

Abstract

The use of chemical pesticides has a variety of negative impacts that are harmful to the environment and humans. Therefore, it is necessary to develop environmentally friendly pest control techniques. To support the development of environmentally friendly pest control techniques, research related to the sublethal of physic nut wangi variety oil on H.armigera. is needed. The experimental design used Completely Randomized Design (CRD). The test used 6 level concentrations (0,1gr/L, 5ml/L, 10ml/L, 20ml/L, and 40 ml/L). Analysis of variance (ANAVA) at α 95% followed by Duncan multiple test at α 5% was carried out. The result of sublethal effect of physic nut test showed that concentration of physic nut wangi variety and IP2A provenance oil did not cause mortality of H. armigera larvae, but inhibited the growth such as indicated by lower weight of pupae and prepupae in treated larvae than in control. The highest percentage of inhibition of prepupae and pupae weight was found in physic nut wangi variety oil with concentration 40 ml/L that show respective results of 57,41% and 65,38%. The highest percentage of inhibition of the number of eggs on next generation, number of succeeded eggs transform into larvae and percentage of succeeded eggs transform into larvae were found in physic nut IP2A provenance oil with concentration 40 ml/L that show respective results of 96,70% and 98,42%. The increasing concentration of physic nut wangi variety and IP2A provenance oil caused a significant increase in the sub lethal effect when the larvae were exposed to these oils. Physic nut wangi variety and IP2A provenance oil can be developed into botanical pesticides because it has the advantage of leaving residues that are easily biodegradable, resulting in secondary metabolic that can be used as a poison, safe for natural enemies and can be used as component in integrated pest management.