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随苹果苗木传播的害虫主要有属于植物检疫对象的苹果绵蚜和不是检疫对象的苹果根绵蚜和桑白蚧。随苹果栽培面积的不断扩大和品种的不断更替 ,苗木的需求量增加 ,苗木的采购地域扩大 ,这就有可能使这几种局部地区发生为害的害虫 ,随苗木的远距离运输传播到新的果区、果园 ,一旦
The pests spread with apple seedlings mainly include the apple aphid belonging to the plant quarantine object and the apple root aphid and the mulberry white scale not quarantined. With the continuous expansion of cultivated area of apple and continuous change of varieties, the demand of nursery stock increased and the purchasing area of nursery stock expanded, which made it possible to make the pests that harm in some local areas spread to the new Fruit area, orchard, once