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芝麻是湖北省的主要油料作物之一。近年来,芝麻花叶病(SMV)在我省芝麻产地均有有不同程度发生。据襄阳地区调查,一般品种发病率在10—30%,重者达50%以上,发病植株表现为花叶、黄化、皱缩、畸型等症状。病株单株产量比健株下降68.4—98.4%,千粒重下降32.5—60.1%。本病的发生,严重地影响了芝麻的产量和质量。为此,我们对襄阳地区不同芝麻品种的花叶病发生情况进行了调查研究,并对病原病毒进行了分离提纯及电镜观察。
Sesame is one of the main oil crops in Hubei Province. In recent years, sesame mosaic disease (SMV) sesame origin in our province have varying degrees of occurrence. According to the investigation in Xiangyang area, the incidence rate of common varieties is 10-30%, and those with severe diseases are more than 50%. The disease-causing plants are characterized by mosaic, yellowing, shrinkage and abnormalities. The yield of diseased plants was 68.4-98.4% lower than that of healthy plants, and the decrease of 1000-grain weight was 32.5-60.1%. The occurrence of this disease has seriously affected the yield and quality of sesame seeds. To this end, we conducted a survey on the occurrence of mosaic disease in different sesame varieties in Xiangyang Prefecture, and isolated and purified the pathogenic virus and observed by electron microscopy.