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以往对桃小食心虫的防治多是采取:在越冬幼虫出土初期,树干周围3尺半径内地面撒布六六六粉;至第一、二代卵发生期或初孵幼虫蛀果期,树上喷洒对硫磷(或其它杀虫剂)3—5次。这套以树上喷药为主的措施,虽曾取得良好的效果,但树上长期使用这些广谱性杀虫剂,对天敌的杀伤非常严重。因之,在防治食心虫的同时,往往引起叶螨类的猖獗蔓延。这种情况,国内、国外几乎相似。如何避免或调整这种矛盾?世界各国的研究,大都注重于寻找选择性杀虫剂,旨在尽量减少对自然天敌的伤害。虽然
In the past, the prevention and control of peach mungbean mostly took: when the overwintering larvae were unearthed in the early stage, the soil around the trunk was spread with 666 powder within 3-foot radius; and the first and the second generation eggs or newly hatched larvae were sprayed on the trees Parathion (or other pesticides) 3-5 times. This set of tree spray-based measures has achieved good results. However, long-term use of these broad-spectrum insecticides in trees has resulted in very serious damage to natural enemies. Therefore, the prevention and control of heart-worm at the same time, often lead to rampant spider mites spread. This situation is similar at home and abroad. How to avoid or adjust this contradiction? Most countries in the world focus their research on selective insecticides to minimize the harm to natural enemies. although