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田间药效试验结果表明:药后1 d,21%醚菊.吡蚜酮SC 375~600 mL/hm2对稻田白背飞虱的防治效果为72.14%~82.87%,优于吡蚜酮,与醚菊酯相仿;药后7 d,防治效果为95.89%~97.07%,明显优于吡蚜酮、醚菊酯;药后21 d,仍有95.69%~97.52%的防治效果,极显著优于吡蚜酮、醚菊酯。该药剂不同用量对微蛛的影响最大,稍高于对照药剂;对狼蛛的杀伤作用明显低于对照药剂;对球腹蛛基本无杀伤作用。因此21%醚菊.吡蚜酮SC对水稻白背飞虱具有良好的防治效果,速效性好,持效期长,对水稻和田间蜘蛛安全,推荐剂量为375 mL/hm2,防治适期宜掌握在白背飞虱若虫高峰期。
The results of field trials showed that the control efficacy of 21% Ethephon SC 375 ~ 600 mL / hm2 on white-backed planthopper in paddy field was 72.14% ~ 82.87% at 1 d after the treatment, which was better than pymetrozine and Ethafentanthin were similar; the control effect was 95.89% ~ 97.07% at 7 d after the treatment, which was obviously better than pymetrozine and etofenprox; 21 days after treatment, there were still 95.69% ~ 97.52% of the control effect, which was significantly better than Pymetrozine, Ethephon. The different doses of the agent have the greatest impact on the micro-spider, slightly higher than the control agent; the killing effect on the tarantula was significantly lower than that of the control agent; Therefore, 21% of ethephon and pymetrozine SC had good control effects on whitebacked planthopper (Squalaysis sibirica), and had good quick-effect and long-lasting effect. The recommended dose was 375mL / hm2 for rice and field spiders, Master white-backed planthoppers nymphs at peak.