论文部分内容阅读
稻白叶枯病是广西水稻重要病害之一。而且近年来有扩大蔓延趋势。据报道,广西1957年以前仅零星发生,1960年全区普查发生于61个县市。1975年据40个县市的统计,发生面积达60.6万亩,1978年病害流行,由于大面积推广种植感病的杂优组合,全区白叶枯发病而积高达199万亩,粮食损失严重。当今,利用抗病品种防治水稻白叶枯病是根本的途径,
Rice bacterial leaf blight is one of the important diseases of rice in Guangxi. And in recent years there is an expansion trend. It is reported that Guangxi only sporadically occurred before 1957 and in 1960, the region census took place in 61 counties and cities. According to the statistics of 40 counties and cities in 1975, an area of 60.6 hectares occurred. In 1978, the disease epidemic was widespread. As a result of the large-scale promotion of the excellent combination of planting susceptible diseases, the yield of white leaf blight in the whole area reached as high as 199 million mu and the grain loss was serious . Today, the use of disease-resistant varieties of rice bacterial leaf blight is the fundamental way,