Pay attention to the control of muskmelon downy mildew in spring shed

According to a recent survey conducted by the county plant protection station in Leting Town, Panggezhuang Township, Tingliuhe Town and other places, muskmelon downy mildew has generally occurred in spring sheds, and the occurrence of downy mildew in some greenhouses is more serious. in general, the rate of diseased plants is 20%, and the rate of diseased leaves is 10%. The rate of seriously diseased leaves is more than 40%. With the increase of temperature and humidity, there is a serious epidemic trend. It is hoped that farmers everywhere should promptly investigate and treat muskmelon downy mildew in spring sheds.

Prevention and control methods:

The main results are as follows: 1. Strengthen field management, increase phosphorus and potassium fertilizer, spray foliar fertilizer to improve plant disease resistance.

2. Improve the microclimate in the field and create ecological conditions that are not conducive to the invasion of bacteria by regulating the temperature and humidity in the greenhouse.

3. Chemical control: adopt the prevention and control method of the combination of smoke agent, dust agent and spray. The commonly used smoke agents are 20% chlorothalonil smoke remover, epidemic frost smoke cleaning agent, 5% chlorothalonil dust agent, and spray agents such as Yinfari suspension agent, 52.5% anti-fast water dispersible granule, Kelu, etc., which are sprayed once every 10 days for 4 consecutive prevention and control.