Symptoms of the plants were obviously dwarfed, internodes shortened, slightly shaped, and there were obvious yellow and green mottled mosaics. Green mottles were limited by veins, some turned red, and old leaves performed more clearly. In the young leaf stage, the leaves become smaller, the leaves shrink, and the nicks are less than the healthy leaves. In the later period of the adult plants, there are symptoms of high temperature conditions that are trapped or have no symptoms, and sometimes the symptoms are re-obvious. The past few studies on cotton virus disease have attracted the attention of relevant departments. Common bacterial virus called common mosaic virus and Tobacco streak virus called tobacco line virus. Transmission routes and disease conditions Ordinary mosaic virus is transmitted by tobacco whitefly in the field, but the eggs are not poisonous, the seeds are not transmitted, the grafting can transmit the virus, and sometimes the virus can be transmitted through the juice. In the field, Bemisia tabaci feeds on poisonous weeds and spreads the virus to cotton plants, resulting in sporadic disease. As for the tobacco line virus, it is somewhat similar to the common mosaic virus, but the incidence rate is higher than the former, its mediator is not clear, and the incidence of grafting and transmission is fast. Control methods used disease-resistant varieties.