二点叶螨在偃师部分果园为害严重１９９７年偃师市部分苹果园因一种新的螨类为害，造成叶片变红，大量脱落，严重影响苹果产量。此虫于１９９６年已在少数乡的苹果园发现，１９９７年为害面积迅速扩大，为害程度进一步加重。经鉴定该螨为二点叶螨，它与苹果上发生的其它螨... Two-point spider mites in Yanshi part of the orchard serious damage 1997 Yanshi City part of the apple orchard due to a new mite damage, causing the leaves turn red, a large number of off, seriously affecting the apple yield. This pest was found in apple orchards of a few townships in 1996 and the area of ​​damage rapidly expanded in 1997, further aggravating the degree of harm. The mite is identified as two-point spider mites, it occurs with other mites on the apple ...