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都匀市柑桔红蜘蛛发生普遍,抗药力强。为探索新的高效低毒低残留农药品种,1985年我们于沙井街村柑桔园进行克螨特、溴螨酯对柑桔红蜘蛛药效试验。 (一)方法 设73％克螨特为2000、2500、3000倍液;50％溴螨酯1000,1500倍液;40％氧化乐果1000倍液;以不喷药为对照。7个处理,3次重复。小区面积0.3亩,总面积6.3亩,360株。随机排列。每处理抽查3株,每株按东南西北和中部五个方位分别作标记固定5条枝梢,调查10片叶。喷药前7天和喷药后7天、14天,各抽查一次活螨卵数,统计减退率。 (二)结果 1.对成、若螨的防效:73％克螨特具有击倒力强,使用浓度较低,却比其他两种浓度较高的药剂强。克螨特2000和3000倍效果无明显差异。因此用3000倍液,用药少收效
Duyun Citrus red spiders common, strong resistance. In order to explore new varieties with high efficiency, low toxicity and low residual pesticides, we tested the efficacy of propargite and bromocopter on citrus spider mites in citrus orchard in Shajingjie village in 1985. (A) method set 73% mites special for 2000,2500,3000 times; 50% Bromoproxil 1000,1500 times; 40% omethoate 1000 times; to spray as a control. 7 treatments, 3 repetitions. Residential area of 0.3 acres, with a total area of 6.3 acres, 360. Random arrangement. Three samples were processed for each treatment, and each plant was fixed with five shoots according to five orientations of northwestern, northeastern, and central China, and 10 leaves were investigated. 7 days before spraying and 7 days after spraying, 14 days, the spot check the number of live mite eggs, statistical reduction rate. (B) the results 1. Against into, if the mite control effect: 73% mite special force knockdown, the use of lower concentrations, but higher than the other two concentrations of strong agents. Propargite 2000 and 3000 times the effect no significant difference. Therefore, with 3000 times the liquid, less effective drug