6种杀虫剂对甘蔗蛴螬的田间防治效果

目的]为了筛选防治甘蔗蛴螬的理想药剂,采用随机区组排列法结合甘蔗大培土布施6种杀虫剂进行田间药效试验.结果]5％异丙特丁硫磷颗粒剂防治蛴螬效果最佳,残留虫口数最少,为1.67头/m2,蔗根受害情况也最轻,受害率仅为5.56％,两者相对防效均为最高,分别为76.19％、93.57％.其次是8％毒死蜱·辛硫磷颗粒剂和8％杀螟单·辛硫磷颗粒剂.其他杀虫剂对蛴螬均有一定防效,但效果不甚理想.结论]结合甘蔗大培土,选施5％o异丙特丁硫磷颗粒剂75 kg/hm2、8％毒死蜱·辛硫磷颗粒剂60 kg/hm2和8％杀螟单·辛硫磷颗粒剂60 kg/hm2等药剂,可有效防治甘蔗蛴螬,保护蔗根免受为害.

Control Efficacy of Six Insecticides to White Grubs in Sugarcane Fields

Aims] In order to screen out effective insecticides against white grubs in sugarcane fields,control effect trails were carried out using randomized block design with six insecticides at large earth-up.Results] Among six insecticides tested,the best insecticide against white grubs was isopropyl-terbufos 5% GR,followed by chlorpyrifos·phoxim 8% GR and cartap?phoxim 8% GR.In the treatment with isopropyl-terbufos 5% GR,the number of residual white grubs was the minimum(1.67 heads/m2),and the root infestation rate was the lowest(5.56%),both the relative control effects were maximum,76.19 and 93.57%,respectively.The effects of other insecticides against white grubs were not very good.Conclusions] To control effectively white grubs and to protect sugarcane roots from the damage of white grubs,isopropyl-terbufos 5% GR(75 kg/ha),chlorpyrifos?phoxim 8% GR(60 kg/ha) and cartap·phoxim 8% GR(60 kg/ha) should be selected and used at large earth-up in sugarcane fields.