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几年来,苗圃防治白杨透翅蛾的经验证明,使用兑水二十倍杀螟松药液涂抹透翅蛾排粪孔,可以完全杀死已蛀入苗茎的透翅蛾幼虫。防治时以苗高不超过两米的苗子为宜,苗木再高涂抹困难,工效低。兑水十倍时涂抹嫩梢有药害发生。我们用的是地方国营宁波农药厂出品的杀螟松乳剂(杀螟硫磷SUMITHION),用原液兑水二十倍,可用毛笔沾药液对准排粪孔连续涂抹3—4次,使药液利用粪孔的毛细管作用而吸入。据观察,杀虫效果主要是粪孔道已含药液,当幼虫再来排粪时粘着药液而触杀。刚蛀入的幼虫可少涂,早已蛀入的可多涂。本法的缺点是,对不易发现的排粪孔容易遗漏,而
Over the past few years, the experience of prevention and treatment of poplar moth nursery moths prove that the use of watered 20 times fenitrothion solution smear perforation femoris hole, can completely kill moth into the stem moth larvae. When the seedling height is not more than two meters when the control is appropriate, seedling again high smear difficulties, low efficiency. Ten times watered when applying fresh shoots have occurred phytotoxicity. We use the local State-owned Ningbo Pesticide Factory produced fenitrothion emulsion (fenitrothion SUMITHION), 20 times watered with the liquid can be used brush brush liquid drained fecal hole continuous painting 3-4 times, the drug Liquid fecal holes through the role of capillary inhalation. It is observed that the insecticidal effect is mainly the fecal hole contains liquid, when the larva again defecation sticky liquid and touch. Just eaten into the larvae can be less coated, may have been too much into the coating. The shortcoming of this law is that it is easy to miss the hard to find fecal hole