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在电子显微镜诊断中发现有MLOs 靠近寄主筛管细胞的细胞壁和穿进寄主细胞壁的现象。把同品种染病烟株上的病枝嫁接在健株上,在1个月后开始发现与病株相同的症状,证明了病株的传染性。根据泡桐病株与烟草混合栽培自然发病情况的观察结果、菟丝子传染试验结果、介体昆虫传染试验和不同生态区的病情调查结果来看,烟草丛枝病不是由泡桐丛枝病传染的病害,肯定泡桐区可以发展烟草,烟区可以发展泡桐。采取烟田病、虫、草综合治理,可以控制烟草丛枝病的蔓延。
MLOs were found close to the cell walls of host screen cells and into the host cell wall in electron microscopic diagnosis. The same species of infected tobacco plants on the branch disease grafted on healthy plants, and 1 month later began to find the same symptoms and diseased plants, proved the contagious disease. According to the observation results of the natural disease caused by the mixed cultivation of paulownia and tobacco, the results of dodder infection test, the transmission test of mediator insects and the investigation of disease in different ecological areas, the tobacco brouch disease was not the disease transmitted by the Paulownia witches broom disease, Certainly Pauline area can develop tobacco, tobacco area can develop paulownia. To tobacco disease, insects, grass comprehensive management, you can control the spread of tobacco witches broom disease.