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小麦白粉病往往在一般年份发病较轻,高产年份发病较重。1989年春季本地多雨寡照,小麦白粉病在我县普遍发生,面积约56万亩,占小麦播种面积的70.3％,平均病叶率65.6％,严重时一般为60～80％,最高达100％。损失小麦660万公斤。为控制此病的蔓延危害,确保1990年的小麦丰收,我们采取了如下措施。一、加强春季田间管理,预防病害发生。小麦白粉病是气传病害,对湿度比较敏感,在高湿的环境条件下,有利于病菌的繁殖,侵入和发病,危害损失也大。因此,在小麦春季
Wheat powdery mildew is often less common in the general year of onset, high incidence of heavy years. In the spring of 1989, the local rainy and lightly-grained, wheat powdery mildew occurred in our county, with an area of about 560,000 mu, accounting for 70.3% of the sown area of wheat with an average diseased leaf rate of 65.6% and in severe cases, 60-80% and up to 100% . Lost 6.6 million kilograms of wheat. In order to control the spread of the disease and ensure the harvest of wheat in 1990, we have taken the following measures. First, strengthen field management in spring to prevent disease. Wheat powdery mildew is a gas-borne disease, more sensitive to humidity, in high humidity environment conducive to the propagation, invasion and pathogenesis of bacteria, the damage is also great. So in the spring wheat