论文部分内容阅读
纵观国内外,水稻白叶枯病综防技术发展的历史及成功经验,作者以四川省彭县常发病区的防治研究及实践为背景,分析了影响常发病区白叶枯病消长的主导因子是品种抗性、气象(雨日、雨量)、菌量、施氮量,水层、密度等,其中又以品种抗性、气象、菌量、施氮量影响最大。阐述了以抗性品种为主体,注重生态调节,恶化病害环境,辅以药治的对策,是行之有效的,也是近三年白叶枯病下降的主要原因。同时指出,今后五至十年白叶枯病在全国范围内大流行的频率减少,但新病区有所发展,局部地区的危害仍然是严重的。因此,应继
Throughout the history of the development of rice bacterial leaf blight comprehensive prevention and treatment at home and abroad, the author, based on the research and practice of prevention and control of the frequently occurring disease area in Peng County, Sichuan Province, analyzes the dominance of the growth and decline of the bacterial blight affecting the frequently occurring disease area The factors were variety resistance, meteorology (rainy days, rainfall), bacteria amount, nitrogen application rate, water layer and density, among which, resistance of varieties, meteorology, bacteria amount and nitrogen application rate were the most important factors. It is effective to expound the countermeasures that the resistant varieties are the main body, the ecological regulation, the disease environment is deteriorated, and the medicine is supported. It is also the main reason for the decline of the bacterial blight in the recent three years. At the same time, he pointed out that the frequency of pandemic blight in the next five to ten years in the whole country will decrease. However, the development of new wards will still bring about serious harms in some areas. Therefore, should follow