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以危害柳树的柳兰叶甲、柳蚜、华北大黑鳃金龟为试验对象,采用15%吡虫啉.敌敌畏注干液剂、4.5%吡虫啉注干液剂、3%啶虫脒乳油和30%敌畏.氧乐注干液剂进行了树干注药的防治试验。结果表明15%吡虫啉.敌敌畏注干液剂和4.5%吡虫啉注干液剂注干后对3种害虫均有较好的防效,其田间持效期可达110 d以上。以0.4 mL/cm树干胸径的注药量春季注射,对一个生长周期内不同发生时间危害柳树枝梢、叶部害虫均有较好的防治效果;3%啶虫脒乳油对华北大黑鳃金龟有较好的防效,其田间持效期也可达110 d,但对柳兰叶甲、蚜虫防效差;30%敌畏.氧乐注干液剂持效期为38 d,对在药效期间发生的柳兰叶甲、蚜虫有较好的防效。
Willow leaf beetle, willow witch beetle and North China macropter gramineus were used as test objects, using 15% imidacloprid, dichlorvos dry solution, 4.5% imidacloprid injection liquid, 3% acetamiprid cream and 30% enemy Fear. Oxygen injection dry liquid medicine injection prevention and control of the trunk. The results showed that 15% imidacloprid, dichlorvos dry solution and 4.5% imidacloprid injection solution were effective in controlling three kinds of pests, and their persistence period was more than 110 days. The injection of 0.4 mL / cm trunk DBH in spring showed good control effect on willow branches and leaf pests at different times during one growth cycle. The insecticidal effect of 3% acetamiprid EC on Has better control effect, and its field maintenance period can reach up to 110 d, but for the yarlung leaf beetle, the aphids have a poor control effect; 30% of the dichlorvos. Oxygen injection dry liquid is 38 d, Willow leaf efficacy occurred during aphids, aphids have better control effect.