一、玉米耕葵粉蚧简介及近年来发生发展动态玉米耕葵粉蚧属介壳虫里的粉蚧类,在河北主要危害夏玉米,另外还危害小麦、高粱及部分禾本科杂草。以若虫和雌成虫群集于地表下寄主茎基部吸食汁液,小麦、玉米受害后叶脉发黄,严重时整株叶片呈现黄弱形态,类似于脱肥,生长变缓慢或停滞,与健壮株形成明显反差,严重影响产量。在田间分布呈点片状,区域相对集中。玉米耕葵粉蚧传播方式有自然传播和人为传播两种渠道。自然传播主要有虫体的小范围移 First, the corn cultivated seed meal Kuwana introduction and developments in recent years Corn cultivated meal Kuwana scale insects in the scale of mealybugs, the main harm in Hebei summer maize, but also endanger the wheat, sorghum and some grass weeds. The nymphal and female adults clustered on the surface of the base of the host stems at the bottom of the juice, wheat, corn damaged veins yellow, severe yellow leaves of the entire plant morphology, similar to the de-fatting, slow or stagnant growth, and the formation of significant strains Contrast, seriously affecting the yield. The distribution in the field was a bit flaky, the area is relatively concentrated. Corn cultivated mealybugs spread There are two ways of natural transmission and man-made transmission. Natural dissemination of the main body of a small shift