Early Spring Watermelon Early Protection Against Broom
In the early stages of colonization of watermelons in the early spring, the disease was relatively serious. The main manifestation was the cracking of the stalks near the mulching film, and the amber-like gel-like flow was severe, but lighter on the leaves. Through the understanding of farmers, the temperature of arch sheds was low at the early stage of planting and the mulch film was covered early, and the upper layer covered with multiple layers of film. This resulted in large moisture on the stalks. After the film was uncovered, the moisture on the leaves dried faster, but the lower stalks Stalks close to the film, humidity, susceptible to disease. Therefore, in order to prevent this disease, we must focus on the disease, control the disease in the early stage, to avoid the later leaves, the fruit infected.
1. Adjust the temperature and humidity in the booth in time. When multiple layers are covered in spring, the humidity in the shed is too high, and the ventilation should be increased to reduce the humidity in the shed. The watermelon seedling temperature need not be too high, keep at 22 °C ~ 25 °C, extend the vine period 25 °C ~ 28 °C, the melon period 30 °C ~ 35 °C.
2. Avoid mulching on stems when planting. When the temperature is high, hot gas escaping from the opening of the mulch causes the humidity at the base of the stalk to increase. Therefore, when the vegetable growers cover the plastic film, they will keep their mouth larger, avoid clinging to the stem, compact it with soil, and reduce the incidence.
3. Select appropriate drugs to prevent and treat in advance. The diseased plants can be sprayed with 32.5% phenyl azoxystrobin suspension 1500 times. There is no incidence of greenhouses, it is recommended that farmers use 70% Koto WP 500 times liquid spray prevention, pay attention to the focus of spraying stem base.
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