常规药剂防治水稻白背飞虱田间药效试验

Field Efficacy Trial of Common Insecticides Against Rice White-backed Planthopper

为探明常规药剂对水稻白背飞虱的防效,筛选出防治白背飞虱的高效药剂,于2021年选用20%氟啶虫酰胺悬浮剂、25%吡蚜酮可湿性粉剂、50%噻嗪酮悬浮剂、25%噻虫嗪水分散粒剂、30%毒死蜱微囊悬浮剂这5种药剂开展了水稻白背飞虱田间试验。结果表明:药后1 d,20%氟啶虫酰胺悬浮剂、25%噻虫嗪水分散粒剂、30%毒死蜱微囊悬浮剂对白背飞虱的防效分别为67.95%、73.11%和72.13%,明显高于另外2个处理;药后3 d,20%氟啶虫酰胺悬浮剂、25%噻虫嗪水分散粒剂对白背飞虱的防效分别达86.04%和84.91%,高于其余3个处理;药后7 d,20%氟啶虫酰胺悬浮剂对白背飞虱的防效达90.01%,高于其余4个处理;药后10 d,20%氟啶虫酰胺悬浮剂对白背飞虱的防效达94.97%,显著高于其余4个处理,显示出较好的持效性。生产上可将氟啶虫酰胺、噻虫嗪、毒死蜱微囊悬浮剂作为田间防治白背飞虱的主要轮换药剂,限制噻嗪酮的应用,对吡蚜酮做好抗性监测。

In order to investigate the control effects of common insecticides and select out efficient insecticides against white-backed planthopper,the field trial was conducted on rice white-backed planthopper in 2021 by using 5 insecticides:20%flonicamid SC,25%pymetrozine WP,50%buprofezin SC,25%thiamethoxam WDG and 30%chlorpyrifos CS.The results showed that on the 1st day after treatment,the control effects of 20%flonicamid SC,25%thiamethoxam WDG and 30%chlorpyrifos CS against the white-backed planthopper were 67.95%,73.11%and 72.13%,respectively,which were significantly higher than those of the other two treatments.On the 3rd day after treatment,the control effects of 20%flonicamid SC,25%thiamethoxam WDG against the white-backed planthopper were 86.04%and 84.91%,respectively,which were higher than those of the other three treatments.On the 7th day after treatment,the control effect of 20%flonicamid SC against white-backed planthopper reached 90.01%,which was higher than those of the other four treatments.On the 10th day after treatment,the control effect of 20%flonicamid SC against the white-backed planthopper reached 94.97%,which was significantly higher than those of the other four treatments,showing good sustainability.In production,flonicamid,thiamethoxam and chlorpyrifos CS can be used as the main rotation agents for the field control of white-backed planthopper,and the application of buprofezin can be restricted,and resistance monitoring of pymetrozine should be carried out.