Pay attention to shed management after the weather turns fine
Avoid severe changes in temperature and light, such as chilling or freezing damage. If the temperature is increased immediately after sunny, the temperature in the greenhouse will be too high, the changes will be too severe, the mesophyll tissue will not have time to recover, and the leaves will dry out. Gradually increase the light, increase the temperature of the shed, and avoid excessive changes in the environment.
Strengthen the management of fertilizer and water Do not immediately water and topdress the plants after being damaged by cold. You can apply suspended calcium and vegetative nutrients to improve the root regeneration 3 to 4 days after the weather improves. Also pay attention to foliar topdressing, etc., to promote leaf function recovery.
Timely prevention and control of diseases and insects After chilling damage, the disease resistance of vegetables is reduced, which is likely to cause disease epidemics. Attention should be paid to timely prevention and control of diseases.
Fungi and other diseases that are mainly transmitted through the air can be fumigated with air disinfection tablets to reduce the spread of germs. If the disease has already occurred, spray it with medicine in advance, and do not wait until the disease outbreak before controlling.
Preventing the damage of vegetables due to the poor photosynthesis of the vegetable leaves over a long cloudy day, or even photosynthesis, the leaves of the vegetables become thin, yellow and tender, the fibrous tissue is weak, and the drug resistance is poor. At this time, spraying the pesticide is likely to cause damage to the vegetables. . Therefore, don't rush to spray after cloudy weather suddenly clears, it is best to spray again after 1-2 days.
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