1%联苯·噻虫嗪颗粒剂对宿根蔗甘蔗粉蚧的田间防治效果

The Field Efficacy Test of Bifenthrin·Thiamethoxam 1% GR on Sugarcane Mealybugs in Ratoon Cane

为掌握1%联苯·噻虫嗪颗粒剂(颖壮)对宿根蔗甘蔗粉蚧的田间防治效果,在广西南宁和来宾2个蔗区采用撒施法,开展该杀虫剂不同剂量防治宿根蔗甘蔗粉蚧效果的田间试验。结果表明,1%联苯·噻虫嗪颗粒剂(颖壮)5 000和6 000 g/亩处理在2个试验点的为害株率防效均显著高于对照药剂(3%辛硫磷颗粒剂5 000 g/亩),为害株率防效大于84%;颖壮5 000和6 000 g/亩处理的虫口密度防效大于87%,且南宁试验点的虫口密度防效显著高于对照药剂(辛硫磷)。结果表明,1%联苯·噻虫嗪颗粒剂(颖壮)对宿根蔗甘蔗粉蚧有较理想的防治效果,生产上建议撒施2次,每次推荐用药量为5 000~6 000 g/亩。

In order to understand the field efficacy of Bifenthrin·Thiamethoxam 1% GR on sugarcane mealybugs in ratoon cane, the field efficacy of this insecticide different doses with broadcasting method on mealybugs in ratoon cane in Nanning and Laibin of Guangxi province were studied in this paper. The results showed that the control efficacy of damaged plant rate of Bifenthrin·Thiamethoxam 1% GR with 5 000, 6 000 g·mu-1 at Nanning and Laibin cane regions were more than 84%, and significantly higher than Phoxim 3% GR with 5 000 g·mu-1. The control efficacy of population density of Bifenthrin·Thiamethoxam 1% GR with 5 000, 6 000 g·mu-1 at Nanning and Laibin cane regions were more than 87%, and that of Nanning cane region significantly higher than Phoxim. The results indicated that Bifenthrin·Thiamethoxam 1% GR had higher efficacy on controlling sugarcane mealybugs in ratoon cane, and it was suggested to apply twice for 5 000-6 000 g·mu-1 per time.