Li, S.C., Liu, H., & Wu, H.T. 2004 [The occurrence of Comstock mealybug under bagging apple culture and its control.]. China Fruits 1: 44, 51.

Notes: Due to the practice of bagging fruits in apple culture, the Comstock mealybug Pseudococcus comstocki has become a serious pest in recent years. It attacks the branches, shoots, leaves and young fruit. When young bagged fruits are attacked, the bag contents become wet and sticky and the mealybug secretions cause the formation of grey-black moulds on the fruit skin, which affects fruit quality. The bug's body is pinkish in colour and is covered with a waxy powdery substance. Experiments showed that spraying an 800-1000 times solution of 40% omethoate emulsion was necessary to kill eggs, nymphs and adults, and then spraying a 4000-6000 times solution of 1% Shimanjing emulsion was found necessary before bagging.