防治抗性棉铃虫的药剂田间筛选试验

对１５种杀虫剂防治棉铃虫田间药效试验研究表明，防治２代棉铃虫效果较好的农药，在晋南棉区临椅县有２．５％功夫菊酯、５０％棉铃宝、２５％广克威、４０％北农９３１和４０％久效磷；在晋中棉区祁县有３５％硫丹、２０％灭多威、５０％辛溴乳油和２．５％功夫菊酯。防治临猗县３代棉铃虫效果较好的农药有２．５％功夫菊酯、３５％顺丰二号和４０％久效磷。同一农药在不同棉区和棉铃虫不同发生世代药效表现不一，因此在药剂选择上要有区别。

Field Trials for Screening of Effective Insecticide Against Cotton Bollworm

Through field trials with 15 insecticides against cotton bollworm (Heliothis armigera Hubner), the insecticides for effectively controlling 2nd generation of H armigera were selected.That was cyhalothrin 2.5%EC, mixture of phoxim and parathion methyl 50%EC, Guangkewei (mixture) 25%EC, mixture of profenofos and cypermethrin 40%EC and monocrotophos 40%EC in south of Shanxi province, and endosulfan 35%EC, rnethomyl 20%EC, mixture of phoxim and alphamethrin 50%EC, and cyhalothrin 2.5%EC in middle of Shanxi province. For effectively controlling 3rd generation of H armijera in south of Shanxi province, cyhalothrin 2.5%EC, mixture of phoxim, parathion methyl and cypermethrin 35 %EC, and monocrotophos 40%EC would be recommended. Efficacies of same insecticide against H armigera varied with regions and generation of bollworm,which suggested a careful selection of insecticide used in the boll worm control.