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鞍山地区大棚黄瓜白粉病在6月中旬开始发生,发病初期,植株叶片正面出现单个稀疏的白色圆形小粉斑,经3—5日后白粉斑扩大,并由稀疏变为浓密。以后白粉斑连片布满叶表面,白粉逐渐变为暗灰白色,叶片枯黄,干缩下垂,但多不脱落。 近5年来,鞍山地区大力推广用生物农药BO—10防治大棚黄瓜白粉病,累计防治面积已达500余亩,防效均达90％以上。在药效对比试验中,BO—10喷药后见效快,成本又低,而且对环境无污染。
The cucumber powdery mildew in greenhouses in Anshan started to occur in mid-June. At the early stage of the disease, a single sparse white round speckle appeared on the leaves of the plants. After 3 to 5 days, the white spots enlarged and changed from sparse to dense. After the white powder contiguous covered with leaf surface, white powder gradually become dark gray, yellow leaves, shrinking sagging, but many do not fall off. In recent 5 years, Anshan region vigorously promote the use of biological pesticide BO-10 control greenhouse cucumber powdery mildew, the cumulative control area has reached 500 acres, control effect reached more than 90%. In the efficacy comparison test, BO-10 spray quick, cost and low, but also the environment pollution.