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The selection of resistant varieties is the most economical and effective method for controlling powdery mildew. It has been proved that the shallow dormant species such as Gui Nugan and Tong Zi No.1 have good characteristics of low temperature resistance, low light and resistance to powdery mildew, and are suitable for greenhouse cultivation. Although Zhang Ji is susceptible to disease, but because of its consistent results, the rate of deformed fruit is low, and the condition for strengthening disease prevention measures is also a more suitable cultivar.
Implantation is a key measure to achieve the cultivation of robust plants, enhance disease resistance, and promote the high quality and high yield of strawberries. About 25 days before planting, the seedlings with 2 to 3 unfolded leaves were soiled in a nutrient bowl, watered and shaded, and top-dressing thin fertilizer was applied. After the new leaf was unfolded, the bottom leaf was knocked out and renewed. Colonization. This measure can significantly promote the development of strawberry roots, increase new stems, and enhance the resistance of plant populations.
Strengthen the management of greenhouses and implement fitness training. 10 days before planting, mix 2000 kg/mu organic fertilizer with 100 kg quick lime and mix with soil, rake the trench, fill the water cover film, clean the soil with high-temperature fermented heat produced by organic fertilizer and cover film, and sterilize. Source, enrich soil fertility, to ensure that plants grow robustly, increase the resistance of the population. Timely finishing plants, timely removal of the senescent bottom leaves, weak leaves and diseased fruit during the growth of the strawberries, keeping the clean and transparent booths, timely drainage after the rain ventilation, humidity control. Appropriately sparse secondary buds, inflorescences, and weak lateral buds to ensure nutrient concentration and fruitful results. Through the above-mentioned prairie measures, the ecological environment of the greenhouses was optimized, and the natural control of pests was strengthened. At the same time, the sick pods and diseased plants were cut off in time, and the rot branches and rotten leaves of Tanabe were removed and burned out of the shed. It is strictly forbidden that the sick leaves should be discarded around the garden to prevent re-infestation of pathogens by rainwater and air flow.
Adjust temperature and humidity, enhance transparency of the booth. In the peak period of disease from April to May, open the air pressure in the greenhouse to dynamically regulate the temperature and humidity, control the disease environment, and control the temperature in the daytime by 25Â°C in appropriate time, and 15Â°C in the night. In combination with cold insulation, covering the mulch before flowering and covering the awning before flowering can effectively control the loss of soil moisture and the formation of dew condensation on the inner wall of the shed film, thereby reducing the humidity in the shed, enhancing the ventilation and light transmission, and reducing the occurrence of diseases.
Rotation. It is best to cultivate crops in protected areas to reduce the incidence of diseases and insect pests and reduce pests and diseases.
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