甘蔗粉蚧防治药剂筛选及应用效果分析

Screening and Application Effect Analysis of Insecticides against Sugarcane Mealybugs

为筛选防治甘蔗粉蚧的杀虫剂,在广西两个蔗区进行了不同杀虫剂对新植(4个处理)和宿根(3个处理)甘蔗粉蚧的田间防治试验。结果表明,新植蔗应用300 g/L氯虫·噻虫嗪SC 1050 mL/hm^(2)、40%溴酰·噻虫嗪FS 750 mL/hm^(2)、10%吡虫啉WP 22.5 kg/hm^(2)+90%杀虫单SP 6 kg/hm^(2)三种杀虫剂处理对甘蔗粉蚧的防治效果分别为59.71%、62.47%、59.51%,处理间差异不显著,但前两种杀虫剂的虫株率明显低于另一种杀虫剂和对照空白;宿根蔗应用300 g/L氯虫·噻虫嗪SC 1050 mL/hm^(2)对甘蔗粉蚧的防治效果(59.51%)明显优于0.5%噻虫嗪GR 75kg/hm^(2)的防治效果(16.34%),但处理间的虫株率差异不显著。本试验结果说明300 g/L氯虫·噻虫嗪SC 1050 mL/hm^(2)、40%溴酰·噻虫嗪FS 750 mL/hm^(2)和10%吡虫啉WP 22.5 kg/hm^(2)+90%杀虫单SP 6 kg/hm^(2)防治新植蔗粉蚧效果显著;300 g/L氯虫·噻虫嗪SC 1050 mL/hm^(2)防治宿根蔗粉蚧也有较好的效果。因此300 g/L氯虫·噻虫嗪SC可作为新植蔗和宿根蔗粉蚧的防治用药,在新植蔗下种和宿根蔗大培土时按本试验用量一次性施用;40%溴酰·噻虫嗪FS和10%吡虫啉WP+90%杀虫单SP可作为新植蔗粉蚧的防治用药,在新植蔗下种时按本试验用量一次性施用。并探讨了综合防治措施。

The control effects of different insecticides on mealybugs in plant(4 treatments)and ratoon(3 treatments)sugarcane at two places in Guangxi province were studied for screening pesticides.The results showed that in plant crop,there were no significant differences on the control effects of 300 g/L Chlorantraniliprole-Thiamethoxam SC 1050 mL/hm^(2)(59.71%),40%Cyantraniliprole-Thiamethoxam FS 750 mL/hm^(2)(62.47%),10%Imidacloprid WP 22.5 kg/hm^(2)+90%Monosultap SP 6 kg/hm^(2)(59.51%)on sugarcane mealybugs.However,the damaged plant rate by mealybugs of both 300 g/L Chlorantraniliprole-Thiamethoxam SC and 40%Cyantraniliprole-Thiamethoxam FS were inferior to that of the 10%Imidacloprid WP+90%Monosultap SP and the control.In ratoon crop,the control effects(59.51%)of 300 g/L Chlorantraniliprole-Thiamethoxam SC 1050 mL/hm^(2) were superior to that(16.34%)of 0.5%Thiamethoxam GR 75 kg/hm^(2) with no significant difference on the damaged plant rate by mealybugs.The result indicated that 300 g/L Chlorantraniliprole-Thiamethoxam SC 1050 mL/hm^(2),40%Cyantraniliprole-Thiamethoxam FS 750 mL/hm^(2) and 10%Imidacloprid WP 22.5 kg/hm^(2)+90%Monosultap SP 6 kg/hm^(2) had better efficacy on controlling sugarcane mealybugs in plant crop,while the 300 g/L Chlorantraniliprole-Thiamethoxam SC also had better efficacy in ratoon crop.Thus the 300 g/L Chlorantraniliprole-Thiamethoxam SC could be used as pesticides in both plant and ratoon crop,and 40%Cyantraniliprole-Thiamethoxam FS and 10%Imidacloprid WP 22.5 kg/hm^(2)+90%Monosultap SP 6 kg/hm^(2) could be used as pesticides of the mealybugs,and be applied one time during planting.And the comprehensive prevention and control measures were discussed.