The selection of disease-resistant varieties for selection of disease-resistant varieties is an important approach for disease prevention and control. It is necessary to consider the high yield and high quality characteristics of the varieties, pay attention to the collocation of the varieties when planting, and rationally arrange them so as to avoid the long-term contiguous planting of a single variety.
Strengthen field management, deepen the land, increase organic fertilizer, implement crop rotation, remove diseased plants in the greenhouse, strengthen water and fertilizer management, and apply foliar fertilizers to enhance plant resistance.
Ecological control uses the closed environment of greenhouses to form environmental conditions that are conducive to crop growth and unfavorable to disease growth, so as to achieve the purpose of disease prevention. The first is to control the humidity, greenhouse vegetable cultivation should be ridge film, irrigation should be done under the film dark irrigation, it is best to use drip irrigation or infiltration, cover rice straw and other measures to control humidity; followed by warming and humidity, early morning Relieve the curtain, until the room temperature rises to 28°C, open the ventilation vents, and increase the ventilation in the afternoon. The room temperature is controlled at about 20°C. In January-February, it is necessary to grasp the timing of the opening and closing of curtains and pay attention to keeping warm.
Physical control soaking in warm soup, killing the germs on the seeds; deep-cultivation sunburn, to prevent soil-borne diseases; the use of greenhouse yellowfly, aphids and other pests yellowing, set yellow traps.
Chemical control should be rational use of drugs, suitable early prevention. At the same time, we must actively develop and promote biological pesticides, high-efficiency, low-toxicity and low-residue pesticides, dust agents and aerosols, and organically combine soil disinfection, seed treatment, pesticide spraying, dusting, and smoking to prevent and control pests and diseases.
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