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云南是水稻黄矮病发生较早的省分之一。自一九六一年景谷县大面积发生以来,病区逐年扩大,目前已遍及南部的三十余县。流行年分,受灾面积常在十万亩以上,使稻谷生产遭到严重损失,成为我省南部稻区主要病害之一。近十多年来,曾对病害症状、传播方式、发生特点进行了调查研究,并推行以抗病品种、改革耕作制度为主的防治措施,取得了一定成果。为了进一步摸清其发生规律,不断提高综合防治技术,一九七九年在景洪县对其传毒特性作了初步研究。与此同时,在中国科学院上海生化所的帮助下,还对思茅地区的江城和西双版纳州的景洪、勐海、普文等不同地方的病株进行
Yunnan is one of the earliest provinces where yellow dwarf disease occurs. Since the large area of Jinggu County in 1961, the ward has been expanding year by year, and now it has spread to more than 30 counties in the south. Pop years, often affected area of 100,000 mu or more, so that the serious loss of rice production has become one of the major diseases in southern rice province. In the past decade or so, the disease symptoms, modes of transmission and characteristics of diseases have been investigated and investigated, and prevention and control measures based on disease-resistant varieties and reform of farming system have been carried out. Some achievements have been made. In order to further clarify the law of its occurrence and continuously improve its comprehensive prevention and control technology, a preliminary study on its transmission characteristics was conducted in Jinghong County in 1979. At the same time, with the help of Shanghai Institute of Biochemistry, Chinese Academy of Sciences, diseased plants from different places such as Jiangcheng in Simao Prefecture and Jinghong, Menghai and Pulau in Xishuangbanna Prefecture