Compatibility of Lemongrass Extract with Spodoptera litura Nuclear Polyhedrosis Virus Against Spodoptera litura on Soybean Plants

Armyworm (Spodoptera litura) is an important pest that damages the leaves of soybean. SlNPV one type pathogen has potential as a biocontrol agent to control armyworms because it specific, selective, and effective. This study aimed investigate compatibility between lemongrass in controlling armyworm. The Research was conducted at Laboratory Indonesian Legumes Tuber Crops Institute (ILETRI) from February 2016 until April 2016. using completely randomized design with 7 treatments 3 replication treatment consists control, SlNPV-JTM 97C 1,5 × 106 PIB/ml, 10% extract, combination fixed concentrate PIB/ml 2.5%, 5%, 7.5%, extract. results showed 1.5 had highest level virulence, 96% mortality on larva 100% pupa stage, so extracts compatible S.litura.