几种药剂对辽宁高粱主要病虫害的防控效果评价

Effect Evaluation of a Few Pesticides on Sorghum Pest and Disease Prevention and Control in Liaoning Province

[目的]明确20%氯虫苯甲酰胺悬浮剂、40%氯虫·噻虫嗪水分散粒剂以及10%苯醚甲环唑水分散粒剂对辽宁高粱主要病虫害的防治效果。[方法]于2016—2017年采用小区试验和生产田大区防控试验的方法,在高粱喇叭口期1次叶面喷雾施药和喇叭口期与开花期2个时期叶面喷雾施药。[结果]3种药剂各试验剂量混合处理对高粱植株生长安全无药害,持效期长,对高粱田发生的1代玉米螟防效达92.63%~96.12%、全生育期玉米螟蛀孔防效达73.84%~86.52%,对高粱靶斑病防效达61.47%~69.74%,防控作用理想,可有效降低病虫害为害程度,增产作用明显,产量增加7.84%~12.84%。[结论]3种药剂对高粱安全。建议在使用时根据当地高粱病虫害发生具体情况,选择20%氯虫苯甲酰胺SC或40%氯虫·噻虫嗪WG 150mL(g)/hm^2制剂量,混合10%苯醚甲环唑WG 300g/hm^2制剂量,于高粱喇叭口期1次叶面喷雾施用或喇叭口期与开花期2次叶面喷雾施用。

[Aims] This study aims to identify the control effect to main sorghum pest and disease in Liaoning province of cholrantraniliprole 20% SC, virtako 40% WG and difenoconazole 10% WG. [Methods] Plot experiment and large area experiment were carried out in 2016-2017, and the pesticides were applied to leaf surface during bell mouth and flowering periods. [Results] The three pesticides appeared to be safe and no spray burn of all tested doses. The pesticides can effectively control Asian corn borer（control efficacy 92.63-96.12%） and Sorghum Target Leaf Spot（control efficacy 61.47-69.74%） with long control duration, and the crop yield increased by 7.84-12.84% through the pesticides application. [Conclusions] All the three experimented pesticides are safe for sorghum production. The suitable pesticide, doses（cholrantraniliprole or virtako with 150mL（g）/ha, difenoconazole with 300g/ha） and applicaion time（once during bell mouth period or twice during bell mouth and flowering periods） should be recommended according to local pest and disease situation.