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随着蔬菜种植面积的扩大,霜霉病和疫病发生为害上升。使用化学农药防治是控制霜霉病和疫病流行最重要的方法,但由于使用方法不当,用药防治达不到应有的防治效果,生产上仍造成较大的损失。为此,应切实抓好以下措施,控制病害发生。 1.合理轮换用药。当前防治霜霉病、疫病的常用药剂有甲霜灵、乙磷铝、杀毒矾,由于使用多年,病原菌已对上述药剂产生抗药性,从而造成防效下降,要提高防病效果,就应做到药剂轮换使用,避免连续使用单剂,提倡使用复配剂,如甲霜灵锰锌、霜脲锰
Downy mildew and blight have risen as the growing area of vegetables grows. The use of chemical pesticide control is the most important method to control the epidemic of downy mildew and epidemic disease. However, due to improper use, the prevention and control of drugs can not reach the proper prevention and control effect, and the production still causes great losses. To this end, we should effectively grasp the following measures to control disease. 1. Rational rotation of medication. The current control of downy mildew, disease commonly used agents are metalaxyl, B, aluminum, anti-virus alum, due to the use of many years, the pathogen has resistance to these agents, resulting in decreased control efficiency, to improve the effectiveness of prevention and treatment should be done Rotating agent to use, to avoid continuous use of a single dose, to promote the use of compounding agents, such as metalaxyl, zinc oxide, cream urea