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北疆地区夏季高温、干旱、少雨,有利于红蜘蛛发生发展.下野地垦区大部棉田历年夏季都有红蜘蛛发生,并蔓延成灾.红蜘蛛的发生为害,正值棉花蕾铃期,棉株高大封垅,机车已难于发挥作用,飞机防治效果又不够理想.我们在大田选择虫口密度均匀的点、片、区域进行人工喷粉、喷雾、涂茎处理.在棉株中、上部涂茎6—10厘米.器械采用552—丙型压缩式喷粉器、手摇喷粉器.药剂有①拜耳厂50%1059乳油;②上海农药厂40%乐果乳油;③20%乐果乳油;④2.5%敌百虫粉;⑤硫磺石灰粉.施药前后按定点、定株、定叶(每株选上、中、下三叶),于不同时间内调查虫口数,计算虫口增减率.结果如下:
The northern region of Xinjiang in summer heat, drought, less rain, is conducive to the development of spider mite.Xianduchi reclamation area most of the cotton fields in summer all have spider mites, and the spread of disaster.Master spider damage occurs, is the cotton boll period, cotton Strain high seal, the locomotive has been difficult to play a role in the control effect of the plane is not ideal enough .In the field we choose insect population density points, films, areas for artificial dusting, spraying, coating stem treatment.In the cotton plant, the upper stem 6-10 cm. The instrument uses 552-C compression duster, hand duster. Pharmacy ① Bayer plant 50% 1059 EC; ② Shanghai Pesticide Factory 40% dimethoate; ③ 20% dimethoate; ④ 2 .5% trichlorfon powder; ⑤ sulfur lime powder. Before and after spraying according to fixed point, fixed plants, leaves (each plant selected, middle and lower leaves), at different times to investigate the number of insects mouth, The result is as follows: