三种不育剂对山楂叶螨的不育效应

为了有效防治山楂叶螨（Tetranychus viennensis)，以喷蒸馏水为对照，配制3种不育剂（MSA，CSⅡ，MSC）对山楂叶螨进行不育效应的室内试验，MSA，CSⅡ，MSC的试验浓度（3个重复）分别是0．2％，0．5％，1．0％；0．4％，0．8％，1．2％，1倍原液，2倍原液，原液，喷不良剂后，每天对产卵，卵的孵化，交尾，寿命等观察和记载，持续3个月，结果表明，以0．8％的CSⅡ可湿性粉剂喷雾使用为最好，与对照相比，此浓度可将该叶螨的每雌产卵量（粒），孵化率（％）及第2代,雄蠕数量（头）降低，分别为7．17，3．66，1．00和0．50；对照组为73．3，84．06，32．00和70．67。

Sterilizing Effects of Three Chemosterilants on Tetranychus viennensis (Zacher)

In order to control the leaf mite, Tetranychus viennensis (Zacher), three kinds of chemosterilants(MSA,CS Ⅱ and MSC) are prepared and their effects are tested in the laboratory. The tested concentrations are 0.2 %, 0. 5 %, 1.0 for MSA; 0.4 %, 0. 8 %, 1.2 % for CS Ⅱ ;the liquid of original,and that of being diluted 1 or 2 times for MSC. It is the control that spraying distilled water on the leaf mite. After spraying of the chemosterilants on the adult mites, the oviposition, hatching,mating and life-span are recorded every day. The observation lasts for 3 months. The re- sults show that spraying with 0.8 % wettable powder chemosterilant CS 1 gains the best sterilizing effect. The number of oviposited eggs per female adult, hatching-rate (%), and the number of fe- male and male adults of the 2nd generation are 7.17,3.66,1.00 and 0. 50,respectively,while that of the control are 73.33,84.06,32.00 and 70. 67,respectively.