近年来,随着玉米杂交种的推广,玉米大、小斑病为害逐渐严重。目前已成为玉米生产中最严重的病害之一。对这两种病害最有效的办法是推广以抗病品种为主的综合防治。但是目前选育出的玉米杂交种,抗病力一般都不很强,有的甚至严重感病。我国抗病的自交系和杂交种约占总数的 In recent years, with the promotion of corn hybrids, corn, small spot disease damage gradually worse. It has become one of the most serious diseases in corn production. The most effective way to deal with these two kinds of diseases is to promote integrated prevention and control with disease-resistant varieties as the mainstay. However, the currently bred corn hybrids are generally not very resistant to disease and some are even severely affected. China’s disease-resistant inbred lines and hybrids accounted for about the total