DOI: 10.36347/sjavs.2017.v04i12.008

Pages: 560-569

Research of efficacy and induce resurgence of insecticides mixture of pymetrozine 50% + acetamiprid 30 g/l to brown planthopper (BPH), Nilaparvata lugens (Stål) on higher initial population in ricefield was carried out in the wet season 2012/2013 at Ciberes-Subang District-West Java-Indonesia. The research used randomized block design with 10 treatments and three replications. The first insecticides application on a higher population of BPH more than 4 fold of economic threshold. The results showed that all of combinations insecticides mixture of pymetrozine 50% + acetamiprid 30 g/l a little bit effectiveness to suppress BPH with general efficacy of insecticide (GEI) were 60% as a moderately efficacy catagory. Likewise pymetrozine and acetamiprid insecticides it self little bit effectiveness to suppress BPH with the GEI were 60%. The first application of insecticide mixture to macropterous brown planthopper population at 4 fold economic threshold didn’t reduce the BPH population, although the BPH in the plot treatments lower significantly different from the control treatment. The low performance of insecticides mixture due to higher initial BPH population macropterous that had laid eggs and emerged a lot of nymphs after first insecticides application, so only a small part of the nymphs are affected by the insecticides deposit. In the second and third application of insecticides mixture had reduced BPH up to under and around the economic threshold; because all BPH including nymphs are exposed by insecticides spray. All combinations of insecticides mixture of pymetrozine 50% + acetamiprid 30 g/l and it’s single of both insecticides were 100% highly un-induce resurgence to BPH.