Symptoms are also known as cane mosaic disease. Guangdong, Guangxi, Zhejiang, Fujian, Yunnan, Jiangxi, Sichuan, and Taiwan all have distributions. The main damage leaves, especially the most obvious symptoms of the new leaf base. There are generally yellow and green irregular patterns, streaks, or mottled patterns that vary in length and size and are covered with leaves. Sometimes the chlorosis of the lesions is obvious, yellow and white spots are formed, and the red spots of necrosis are occasionally present. The diseased leaves are lighter than the healthy plants and grow slowly.
The pathogen Sugarcane mosaic virus referred to as ScMV, called sugarcane mosaic virus (cane mosaic virus), belongs to the potato virus Y group. The virions are linear, ranging in size from 630 to 77013 to 15 (nm), containing single-stranded RNA, a viral passivation temperature of 53 to 57°C, a dilution limit of 1000 to 100,000 times, and an in vitro survival of 27°C for 17 to 24 hours. -It can survive 27 days at -6°C. The virus has strain differentiation. Taiwan has discovered A, B and A+B3 strains. Only two A and D strains were found in the mainland. Different strains have different virulence on different varieties. In addition to sugarcane, the host of the most important intermediate hosts are corn and sorghum.
Transmission routes and disease conditions Poisonous sugarcane species and field diseased plants are the main primary sources of infection. The virus-mediated mediators are mainly sugarcane knives and virus-infected mites such as cockroaches, rusted cockroaches, silkworm cocoons, black cockroaches, corn leafhoppers, sugarcane cocoons, and peach aphids. Taiwan is mainly a 禾谷缢 tube. In addition, the ant in the sugarcane field is active along with Ruoqiang and has an indirect transmission effect.
Control methods (1) Planting high-resistance or immunized varieties. Such as sugar 70/611, sugar 11 and so on. (2) Use disease-free sugarcane plants, excavate diseased plants, and stop serious planting sugarcane in severe disease fields. (3) Weeding is timely, because many grasses and weeds are both the host of the disease and the host of the narcotics. Avoid intercropping with corn, sorghum and other crops.
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