1%联苯·噻虫嗪颗粒剂对甘薯小象甲的田间防效试验

The Field Efficacy Test of Bifenthrin·Thiamethoxam 1%GR Application in the Control of Sweetpotato Weevil

为探索新型1%联苯·噻虫嗪颗粒剂(颖壮)对甘薯小象甲的防效及对甘薯产量和品质的影响,于2021年在广东省湛江、汕尾和惠州开展了3个田间防效试验。结果表明:1%联苯·噻虫嗪颗粒剂5和6 kg/667m^(2)平均防效分别为78.56%和79.05%,与当地常规施药(多药剂联合多次施药)的平均防效79.22%相当,增产率分别为6.21%和7.17%,显著高于当地常规施药的增产率3.94%,商品薯率也较当地常规施药及空白对照有明显的增加。因此,1%联苯·噻虫嗪颗粒剂(颖壮)可以作为防治甘薯小象甲的高效低风险农药,在鲜食型甘薯生产上具有较大的应用潜力。

To explore the field efficacy of 1%Bifenthrin×Thiamethoxam GR(Yingzhuang)on sweetpotato weevil and its influence on the yield and quality of sweetpotato,three field control experiments were carried out in Zhanjiang,Shanwei,and Huizhou of Guangdong Province in 2021.The results showed that the average control effect of 1%Bifenthrin×Thiamethoxam GR at 5 and 6 kg×667m‒2 was 78.56%and 79.05%,respectively,which was equivalent to the average control effect of 79.22%of the local conventional application(multiple insecticides and multiple times application).The yield increase rate was 6.21%and 7.17%,respectively,significantly higher than the yield increase rate of 3.94%of the local conventional application.The rate of commercial sweetpotato was also significantly higher than the local conventional application and the blank control.Therefore,1%Bifenthrin×Thiamethoxam GR(Yingzhuang)can be used as a highly efficient and low-toxicity insecticide to control the sweetpotato weevil and has great application potential in the production of fresh sweetpotato.