Harmless control of strawberry powdery mildew in greenhouse

Choose disease-resistant varieties, fake plants to cultivate strong seedlings.
The selection of resistant varieties is the most economical and effective way to prevent and control powdery mildew. Practice has proved that the shallow dormant species such as Ghost Nugan and Tongzi No. 1 have good cold and weak light resistance and good resistance to powdery mildew, and are suitable for greenhouse cultivation. Although Zhang Ji is more susceptible to illness, but because of its consistent results, the rate of abnormality is low, and the conditions for strengthening disease control measures are also a suitable cultivar.
Implantation is a key measure to achieve the cultivation of robust plants, enhance disease resistance, and promote high quality and high yield of strawberries. About 25 days before planting, the seedlings with 2~3 pieces of unfolded leaves will be planted in the nutrient bowl, watered and shaded, and the thin fertilizer will be applied. After the new leaves are unfolded, the bottom leaves will be removed. Colonization. This measure can significantly promote the development of strawberry roots, strengthen new stems, and enhance the resistance of plant populations.
Strengthen the management of the shed and implement fitness training. 10 days before planting, mix 1000 kg/mu of organic fertilizer with 100 kg of quicklime and mix well with the soil, sift the gully, fill the membrane, and use the high-temperature yeast heat produced by the organic fertilizer decomposing and covering film to clean the soil and eliminate the sterilization. The source is rich in soil fertility to ensure the robust growth of the plants and increase the resistance of the population. Organize the plants in time, remove the senescent bottom leaves, weak leaves and diseased fruits in time during the growth of the strawberries, keep the shed clean and transparent, and timely drain and ventilate after the rain to control the humidity. Appropriate amount of secondary flower buds, inflorescences and weak side buds to ensure nutrient concentration and neatness. Through the above-mentioned cultivation measures, the ecological environment of the greenhouse was optimized, and the natural control performance was enhanced. At the same time, the diseased stolons and diseased plants were cut off in time, and the rotten leaves of the field were removed and collected and burned outside the greenhouse. It is strictly forbidden to discard the diseased leaves around the garden to avoid re-infestation of the bacteria by rainwater and airflow.
Adjust the temperature and humidity to enhance the permeability of the greenhouse. During the peak period of the disease from April to May, the chamber air inlet is opened to dynamically adjust the temperature and humidity to control the disease environment. The daytime shed temperature is controlled at 25 °C by timely air release, and the nighttime control at 15 °C is appropriate. Combined with cold insulation, covering the mulch and pre-flowering shed before winter can effectively control the loss of soil moisture and the condensation on the inner wall of the shed film, thus reducing the humidity of the shed, enhancing the ventilation and light transmission, and reducing the occurrence of diseases.
Rotation. It is best to carry out crop rotation in the protected area to reduce the source of pests and diseases and reduce the pests and diseases.
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