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黄瓜、白菜、葡萄、啤酒花等作物霜霉病是生产中的重大病害,常因霜霉病流行,减产40—50%。霜霉病的防治研究,过去在药剂防治中,主要限于代森锌、福美双、波尔多液等保护剂,防效一般50%左右。生产上一旦大发生,往往是前期一片绿油油,后期染病灰溜溜,菜农无不唉声叹气。因此,菜农害怕不敢种,城市居民抱怨没有菜吃。霜霉病的防治问题,急待解决。
Cucumber, cabbage, grapes, hops and other crops downy mildew is a major production disease, often due to downy mildew epidemic, cut 40-50%. Downy mildew prevention and control research, in the past in the prevention and treatment of pesticides, mainly limited to deuterosen, Fuk United, Bordeaux mixture and other protective agents, control effect is generally about 50%. In the event of a big occurrence, it is often a green light in the early stage, later dingy disease, vegetable farmers all moan and sigh. Therefore, farmers fear not to grow, urban residents complain about no food to eat. Downy mildew prevention and treatment, urgent solution.