Sensitivity Test of Nilaparvata lugens Stall to Pymetrozine Insecticide

Abstract Brown planthopper (BPH) Nilaparvata lugens Stall is a major pest of rice that often causes outbreaks in several production centers Indonesia. The use insecticides still the choice farmers to control attacks due weak mitigation efforts an area. Continuous can increase resistance and resurgence BPH. purpose this study was determine level sensitivity BPH population pimetrozine insecticide. research conducted at Assesment Research Instalation Agricultural Technology Ungaran, Institute Central Java, Semarang Regency, Indonesia from October 2019 June 2020. collected five regions, namely Jaten Bolong Districts, Sukoharo District, Bendosari, Mojolaban Pulokarto Karanganyar District. method test carried out according IRAC number 005. Observations were made on percentage mortality. data processed using Probit analysis LC 50 value. value used factor (RF). results showed most sensitive insecticide pymetrozine with 13.44 ppm. populations Jaten, Bolong, not resistant RF ≤4. Sukoharjo 2.47 has potential become more pymetrozine. It necessary periodically monitor areas prevent further development.