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4种药剂对水稻褐飞虱的田间防治效果比较

         

摘要

In order to find out the control effects of 4 kinds of pesticides for brown paddy plant hopper, the experiments were conducted by using 50% nitenpyram water soluble granual (NWSG) , 25% pymetrozime wettable powder (PWP), 9.7% ethiprole suspension concentrate (ESC), and 25% thiamethoxam water dispersible granules (TWDG), respectively. The results showed that, the control efficacy of 50% NWSG on brown paddy plant hopper at dosage of 4 g/667m2 were 25.70% and 81.22% respectively after treatment for 1 and 3 days, the swift effect of NWSG was worse; but after treatment for 7 and 14 days, the control efficacy were 97.06% and 88.32% respectively, there was a significant different among PWP, ESC and TWDG, the durable effect of NWSG was prominent; Followed the control efficacy of 25% PWP and 9.7% ESC at dosage of 20 g/667m2 and 31 ml/667m2 respectively up to 86% after treatment 14 days. Three pesticides had better control and holding effects for controlling brown paddy plant hopper and were safe in rice production, they can be used interchangeable as pesticides to control brown paddy plant hopper.%选用50%烯啶虫胺可溶性粒剂、25%吡蚜酮可湿性粉剂、9.7%乙虫腈悬浮剂和25%噻虫嗪水分散粒剂防治水稻褐飞虱的田间药效试验。结果表明,每667m2使用50%烯啶虫胺可溶粒剂4g,药后1d和3d对水稻褐飞虱的防效分别为25.70%、81.22%,速效性稍差,但7d和14d对水稻褐飞虱的防效达97.06%、88.32%,明显优于其他药剂,持效作用突出;每667m2使用25%吡蚜酮可湿性粉剂20g和9.7%乙虫腈悬浮剂31ml,药后14d的防效均达86%以上;3种药剂防治水稻褐飞虱均具有较好的防效性和持效性,且对水稻安全,在生产上可作为防治水稻褐飞虱的药剂交替使用。

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