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高粱是我国北方重要粮食作物之一,近年来,每年种植面积为2500万亩左右,辽宁省为主产区每年种植600多万亩。高粱丝黑穗病一直是影响高粱产量的重要病害。建国以来该病曾几次严重发生,较近的一次发生是由于八十年代初从美国引入新抗源 T×622A及其抗病杂交种在生产上应用后而得到控制。那时在辽宁省高粱生产田中几乎找不到丝黑穗病。但自1989年后,辽宁省高粱丝黑穗病又普遍发生,发病率逐年上升。至1991年辽宁及吉林省部分地区该病为害十分严重,平
Sorghum is one of the important grain crops in north China. In recent years, the annual planting area is about 25 million mu, and more than 6 million mu is planted each year in Liaoning Province. Sorghum smut has been an important disease affecting sorghum production. The disease has occurred several times since the founding of the People’s Republic of China. The more recent one was controlled by the introduction of the new anti-T 622A strain and its disease-resistant hybrids from the United States in the early 1980s. At that time, almost no smut was found in the production of sorghum in Liaoning Province. However, since 1989, the incidence of sorghum smut in Liaoning province has also generally occurred, and the incidence has been increasing year by year. In 1991, the disease in Liaoning and Jilin Province was very serious and flat