新农药防治山楂叶螨的试验研究

Studies on the controlling of hawthorn spider mite by some new pesticides

室内和田间试验结果表明 ,近年推出的新型杀螨剂 :螨即死、果螨红、敌虱螨对山楂叶螨均有优异的防治效果。其中 ,螨即死、果螨红对各个螨态均有优异的效果 ,使用浓度分别以 40 0 0～ 45 0 0倍及 2 5 0 0～ 30 0 0倍为宜 ,且对天敌安全 ;敌虱螨对螨卵效果差 ,而对各活动螨态效果好 ,适宜在苹果中后期使用 ,并能兼治二斑叶螨等害虫。

The experiments of some new pesticides controlling hawthorn spider mite: Tetranychus vionensis Zacher were carried out in laboratory and fields. The results showed that Magister 9.5Ec (fenazaquin) and Guomanhong 10Ec (clofentezine Pyridaben) had excellent effects on the all stages of the mite, and were suitable for controlling the mite after appletree flower fallen with the 4 000～4 500 and 2 500～3 000 times solution respectively. Dismine 0.3Ec (avermectine petroleum oils)only had excellent effects on the alive stages of the mite, and were suitable for controlling in July and August. [WT5HZ]