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高粱丝黑穗病在我省发生历史较久,根据正式记载,1933年东北各地平均发病率为27.3%,1953年东北南部严重发病区发病率高达60%左右。近年来高粱丝黑穗病发病率稍有下降,但损失仍相当严重。1977年海城县平均发病率为12.2%,减产约3900万斤;1978年辽中县平均发病率为15%,减产2700万斤;台安县有15万亩高粱发生丝黑穗病,轻的发病率为
Sorghum smut has a long history in our province. According to official records, the average incidence in Northeast China was 27.3% in 1933, and the incidence in the severe onset areas in south-eastern China in 1953 was as high as 60%. In recent years, the morbidity of sorghum smut decreased slightly, but the losses were still quite serious. In 1977, the average incidence of Haicheng County was 12.2% and the output was reduced by 39 million kg. In 1978, the average incidence rate in Liaozhong County was 15% and the output was reduced by 27 million kg. There were 15,000 mu of sorghum in Taiwan County with smut and light The incidence rate is