近年来山楂红蜘蛛、苜蓿红蜘蛛、苹果红蜘蛛在我区果园发生十分普遍。由于长期使用某种杀螨剂,使叶螨产生抗性,喷药次数不断增加,浓度加大,效果很不理想且提高了生产成本。有些果园因受害严重,造成叶片失绿,甚至提早落叶,使果树花芽分化、产量受到一定影响。 Hawthorn spider mite in recent years, clover red clover, apple red spider occurred in my area orchard is very common. As a result of long-term use of a certain acaricide, spider mites produce resistance, increasing the number of spraying, the concentration increases, the effect is not ideal and increase production costs. Some of the orchards due to serious damage, causing the leaves green, or even early leaves deciduous, fruit flower bud differentiation, the yield is affected.