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1991年我县使用25％扑虱灵可湿性粉剂120公斤,防治柑桔矢尖蚧第二代幼蚧,示范面积3000亩,10月上旬普查示范区虫果率均在5％以下。 一.施药时间:矢尖蚧雌成虫卵胚发育不一致,产卵达80％需20余天。参照历史资料,在叶上幼蚧初见日后16-20天施第一次药、27-31天施第二次药;基数较少的果园在初见日后25天左右施一次药;个别严重果园当代幼蚧盛发期内百叶虫量1000头以上时在初见日后40天左右施第三次。在上述时期内施用扑虱灵,对一至二龄幼蚧防效达95-98％,对雄幼蚧防效好于雌幼蚧。对三龄幼蚧防效稍差,但仍有85％左右的防效。
In 1991, the county used 25% of Bupidoxime WP 120 kg to prevent and control citrus second instar nymphae of Agropyron chinensis, demonstrating an area of 3000 mu. In early October, the cercopithecological rate in the census demonstration area was below 5%. One application time: Sagittal female adult egg embryo development inconsistency, spawning up to 80% need more than 20 days. Reference to historical data, in the leaf larvae see the first 16-20 days after the first application of medicine, 27-31 days of the second drug; less base orchard in the early days after about 25 days to give a drug; some serious Orchard in the current period of vigilante bursal hundred days when the amount of more than 1,000 in the first days after about 40 days of the third facilities. Applying psilitapine in the above period, the control efficacy of 95% to 98% for one to two instar nymphalis and that of male nymphae of the male nymphal. On the third instar nymphs slightly less effective, but there are still about 85% of the control effect.