Quadraspidiotus gigas is a main pest infesting poplar in Northeast China. Chilocorus kuwanae, as a key nature enemy, has good control function to Quadraspidiotus gigas.

• 杨圆蚧是我国东北林区杨树的主要害虫，对它的防治已经由化学防治向生物防治转化，红点唇瓢虫作为杨圆蚧的主要捕食性天敌，对杨圆蚧有较好的控制作用。