井陉县地处太行山区，玉米是其主要粮食作物，从１９９５年调查发现玉米耕葵粉蚧危害玉米后，近几年来发生面积不断扩大，发生程度逐年加重，给玉米生产造成了一定威胁。玉米耕葵粉蚧外披一层白色粉状物，一般若虫体长０．３～１mm（毫米），成虫最大４～５mm，它主要群集于玉 Jingtai County is located in Taihang Mountain area. Maize is the main food crop. After surveying in 1995, it was found that maize mealybug was endangering maize. In recent years, its area has been expanding continuously and the degree of occurrence has been increasing year by year, posing a certain threat to the corn production. Corn Ailanthus mealybug outside a layer of white powder, usually nymph body length 0.3 ~ 1mm (mm), the largest adult 4 ~ 5mm, it is mainly clustered in jade