4种药剂对水稻恶苗病的田间防效

The field control effect of 4 fungicides against rice bakanae disease

[目的]明确田间常用药剂对水稻恶苗病的防治效果,筛选出最佳种衣剂。[方法]对4种药剂进行不同剂量梯度下水稻恶苗病田间防效测定。[结果]25%噻虫嗪·咯菌腈·苯醚甲环唑悬浮剂防治效果最好,防效均达到85.00%,秧苗素质佳,其中350 mL/100kg种子处理剂量的防效最佳(90.14%)。480 g/L氰烯·戊唑醇悬浮剂防效较好,质量浓度为80 mg/L时防效最佳(89.79%)。[结论]25%噻虫嗪·咯菌腈·苯醚甲环唑防效显著,可推广使用;480 g/L氰烯·戊唑醇可辅助使用。

[Aims]In order to clarify the control effect of commonly used pesticides in the field on rice bakanae disease,to screen out the best seed coating agent.[Methods]The field control effect of 4 fungicides on rice bakanae disease under different concentration gradients were determined.[Results]Thiamethoxam·fludioxonil·difenoconazole 25%SC had the best control effect,with control efficiency all reaching 85.00%;the seedling quality was good,and the treatment of 350 mL/100kg seed had the best control effect(90.14%).The control effect of phenamacril·tebuconazole 480 g/L SC performed well,with the best control effect of 89.7%at 80 mg/L.[Conclusions]Thiamethoxam·fludioxonil·difenoconazole 25%SC with significant control effect can be widely used.Phenamacril·tebuconazole 480 g/L SC can be used as an auxiliary.