论文部分内容阅读
玉米病害,已经成为我区玉米生产的主要威胁,自七十年代以来,常发性病害有玉米丝黑穗病、大小斑病、黑粉病、玉米病毒病和果穗干腐病;偶发性病害有青枯病、锈病等。其中可造成危害的有玉米丝黑穗病,大小斑病及矮花叶病。据我们调查,1981年因大斑病大流行,全区玉米减产4500万斤。其中庄浪县的朱店、万泉等公社的一些玉米濒于绝收。在病毒病中主要是矮花叶病和红叶病。1980年本所及灵台在“中单2号”等五个品种和自交系的罹病
Maize diseases have become the main threat to the corn production in our district. Since the 1970s, the common diseases are maize smut, spotty spot, smut, maize virus disease and ear rot; Wilt, rust and so on. Which can cause harm corn head smut, size spot and dwarf mosaic disease. According to our survey, in 1981, the epidemic of the big spot disease caused 45 million jin of maize in the region. Zhuangdian Zhudian, Wanquan and other communes, some corn on the brink of failure. In the virus disease is mainly dwarf mosaic disease and red leaf disease. 1980 and Lingtai in the “Zhongdan 2” and other five varieties and inbred lines of the disease