In order to define the effect of the seven varieties pesticides thiamethoxam, imidacloprid, pyra-zole aphid, buprofezin etc. applying in rice field,screening out the best of pesticides for prevention and con-trolling rice planthopper, we have carried out the experimental study.The experience results show that,the best of two varieties are as follows: applying for150 g/hm 2 of 50% pyrazole aphid. Buprofezin water dis-persible granule and 280 g/hm 2 of 25%thiazine fenobucarb. After applying 7-14 d, the correction control effectshave been reached 91.96%- 95.78%, which realize better effects of readily availability and persis-tance for controlling on rice planthopper;Second better pesticides applying are 25% Thiamethoxam oxazine water dispersible granule and 20% insect amine water dispersible granule. All pesticides applying in the ex-perience have good effects for controlling rice planthopper, especially the varieties of 50% pyrazole aphid. Buprofezin water dispersible granule and 25% thiazine. Fenobucarb, with more outstanding readily avail-ability and effect, which can be alternately applying for the prevention and controlling of rice planthopper.%为了明确噻虫嗪、吡虫啉、吡蚜.噻嗪酮等7种药剂对水稻稻飞虱的防治效果,以筛选出防治稻飞虱的最佳药剂,开展试验研究.试验结果表明,50%吡蚜·噻嗪酮水分散粒剂150g/hm2和25%噻嗪·仲丁威乳油280g/hm2对稻飞虱的防治效果居前2位,在药后7-14d,它们的校正防效达91.96%-95.78%,对稻飞虱的防效具有较好的速效性和持效性;其次速效性较好有25%噻虫嗪水分散粒剂和20%呋虫胺水分散粒剂.参试的各药剂品种对稻飞虱都有比较好的防治效果,其中以50%吡蚜·噻嗪酮水分散粒剂和25%噻嗪.仲丁威乳油的处理防治效果更为突出,均具有较好的速效性和持效性,可在防控稻飞虱中交替应用.
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