论文部分内容阅读
随着我省小麦生产的长足发展,小麦白粉病近年来也呈现逐年加重的趋势。1980年白粉病全省发生面积不足3万亩,到1987年即达到1378.4万亩,1990年又发展到2855万亩,占小麦播种面积的75％。造成白粉病大发生的原因主要是病情信息和防治技术不能及时落实到千家万户。一般年份发病麦田可造成减产10％,严重年份减产30—50％以上,目前,小麦白粉病的流行危害,已成为制约小麦生产的主要障碍之一。
With the rapid development of wheat production in our province, wheat powdery mildew has also shown a trend of increasing year by year. In 1980, the province of powdery mildew occurred in an area less than 30000 mu, reaching 1378.4 mu in 1987 and 28.55 million mu in 1990, accounting for 75% of the sown area of wheat. The main cause of powdery mildew occurred mainly disease information and prevention and treatment technologies can not be implemented in time to millions of households. The incidence of wheat field in general years can reduce the yield by 10% and reduce the yield by 30% -50% in severe years. At present, the epidemic of wheat powdery mildew has become one of the major obstacles restricting wheat production.