The injure and control of Aphanostigma jakusuiense(Kishida) in bagging pears

Bagging is an important method to improve quality of pear fruit.This method is being extended and used in production more and more these years.But with the area increase of the excellent southern pears,the harm of Aphanostigma jakusuiense(Kishida) entering bags is more and more.The economic loss is quite big.So we need to realize the harm features and adopt efficacious way to keep the harm in check.