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[目的]选用5%毒死蜱颗粒剂,通过对韭蛆(Bradysia odoriphaga)药效试验,明确药剂的防治效果、适宜用量、持效期。[方法]采用随机区组排列法进行田间试验,结果采用邓肯式新复极差法检验差异显著性。[结果]5%毒死蜱颗粒剂在1875 g a.i./hm2施用量下,2010、2011年试验结果表明:药后21 d的防效分别达87.07%和84.62%,21 d虫口防效分别达90.22%和89.83%,显著高于对照药剂3%辛硫磷颗粒剂。[结论]建议田间施用1875 g a.i./hm2毒死蜱颗粒剂可有效防治韭蛆。
[Objective] The purpose of the experiment was to choose 5% chlorpyrifos granules and to test the efficacy, appropriate dosage and persistence period of drug by the test of efficacy on Bradysia odoriphaga. [Method] Randomized block arrangement method was used to conduct field experiment. The results were tested by Duncan new repolarization method. [Result] The test results of 5% chlorpyrifos granules at the dosage of 1875 g ai / hm2 in 2010 and 2011 showed that the control efficacy of 87% and 84.62% on the 21 d after d 21 was 90.22% And 89.83%, significantly higher than the control agent 3% phoxim granules. [Conclusion] It is suggested that 1875 g a.i./hm2 chlorpyrifos granules can effectively prevent and cure Leek maggot in the field.