In the vegetable production in greenhouses, many vegetable farmers do not pay attention to the humidity conditions in the greenhouse when pruning the vegetables, and pruning when the humidity in the greenhouse is high. As a result, some diseases have increased, especially bacterial diseases, and infections caused by snoring have caused many vegetable diseases. Therefore, we should pay attention to choosing the right time to pruning, mainly to avoid the excessive humidity in the shed, and the following issues should be noted:
First of all, pruning should be avoided in the morning in the unventilated front shed. Under normal circumstances, the shed has not been ventilated until 9:00 in the morning and the humidity is relatively high. If the pruning occurs at this time, the wound is difficult to dry and susceptible to bacterial diseases. Therefore, pruning is best done after ventilation in the morning.
Second, pruning should be avoided in rainy weather. The humidity in the rainy weather shed is high for a long time, and it is most likely to cause the epidemic of bacterial diseases. If the pruning occurs during this period, the wounds left are extremely susceptible to disease. Therefore, vegetables must be selected for fine weather during pruning.
Again, pruning should be avoided immediately after watering. After 1-2 days of watering, the humidity in the shed is relatively large, and it is also not conducive to squashing at this time. It is better to choose to dry the shed after drying for 3 days. In addition, we must pay attention to spray protection agent before spraying, such as 72% of agricultural streptomycin 3,000 times, 75% chlorothalonil 600 times mixed copper carboxylate (DT) 500 times and other leaves Surface spraying can effectively prevent and control the outbreak of diseases, and prevent problems before they occur.
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