Increase light, promote strawberry photosynthesis
Light is one of the conditions for crops to transform their own nutrients. Under continuous rainy conditions, while maintaining the temperature in the greenhouse, after the temperature rises in the morning, the mulch such as thatch should be removed to increase the light. In rainy weather, incandescent lamps or fill-in lamps can be installed in the shed to supplement the light, increase the light, and promote the accumulation of photosynthetic products. In addition, the surface of the shed film should be cleaned in time after rain to maintain the dripping and light transmittance of the shed film.
Control temperature and humidity to create a microclimate growth environment for strawberry
For greenhouses with poor thermal insulation, increase the thickness of the straw felt and insulation quilt, or cover the outside of the straw felt and insulation quilt with plastic film. At this time, the temperature in the shed should be controlled to be above 20°C during the day and 8 at night. ℃ above. When the night temperature is below 8℃, heating measures should be taken to avoid affecting the normal growth and pollination process of strawberries. Use stoves, heating stoves, etc. to heat up. Pay attention to safety during operation and slowly increase the temperature in the shed. . While ensuring temperature conditions, it can be ventilated for a short time around noon to reduce the humidity in the shed and prevent the occurrence of diseases.
Release bees in time to assist strawberry pollination
When the strawberry blooms in continuous rainy weather, bees should be released in time to assist in pollination, increase the fruit setting rate, and reduce the number of deformed fruits. Generally, a box of bees is placed in a large shed. The beehive should be placed 50 cm above the ground to reduce the humidity of the beehive and reduce the hazards of woodlouses and ants to the bees. When the strawberry blooms less, the bees should be fed sugar water frequently to prevent the bees from biting and death due to hunger. When using pesticides, you should consider whether to move the hives out of the shed according to the degree of harm of the chemicals to the bees, so as to prevent the bees from dying due to pesticide damage.
Strengthen cultivation management
The cultivation and management of strawberry in the shed should be strengthened in continuous shade and rainy days. Old leaves, diseased leaves and residual leaves should be removed in time, lateral buds should be removed, flowers and fruits should be thinned, deformed fruits and small flowers on delicate branches should be removed. Generally, each plant will retain fruit 6 or so is appropriate, and fruit thinning can also be made according to plant growth conditions. In continuous rainy weather, special attention should be paid to the prevention and treatment of gray mold and powdery mildew. After each farming operation, use procymidone or Pythium·chlorothalonil fumigant for sterilization and disease prevention.
Management after continuous cloudy weather
Due to continuous low temperature and rain, the absorption capacity of the root system is greatly reduced. Once it is sunny, the transpiration of strawberry is strengthened, and the absorption capacity of the roots cannot keep up, which will often cause the seedlings to wilt sharply. Therefore, water should be watered as slowly as possible when watering, otherwise the roots will die. If top dressing is needed at this time, instant water-soluble fertilizer should be applied with water, the concentration should be small, and the root promoter should be flushed with water. The foliage can be sprayed with fertilizers such as 0.3% potassium dihydrogen phosphate to improve the resistance of strawberries to low temperature.
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