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李始叶螨是危害苹果的主要害螨,它利用刺吸式口器在植物叶片背面吸收叶肉细胞汁液。受害部位首先表现为退绿,继之发黄或发红,严重的甚至脱落。影响光合作用,对苹果的产量和质量影响极大。为了有效地防治李始叶螨,本人于2002年6月30日-7月7日做了几种杀螨剂对李始叶螨的药效比较实验。现将结果报告如下:
Lee spider mite is the main pest mites harm apple, which uses the piercing suction device on the back of leaves of the plant to absorb mesophyll juice. The first part of the victim showed the green back, followed by yellowing or redness, serious or even fall off. Affect photosynthesis, the output and quality of apple has a great impact. In order to effectively control Lee spider mite, I in June 30, 2002 -7 on July 7 made several acaricides on the leaf spider mite efficacy comparison experiment. The results reported below: