Control measures of shed leek disease
1, small water irrigation. Because the leek disease is transmitted by the current, such as flooding, it is very easy to cause the humidity in the greenhouse to increase, so that the epidemic spreads. Therefore, small water should be poured. In addition, pay attention to the application of phosphorus and potassium fertilizers when fertilizing, too much nitrogen fertilizer will cause the occurrence and expansion of the disease.
2, timely ventilation. Pay attention to ventilation after watering to reduce the humidity in the greenhouse. Ventilation is selected at noon on a sunny day with no wind. General ventilation time should not be too long, 1-2 hours is appropriate. When the area of ​​the shed is too large, multiple ventilation methods can be adopted. However, the ventilation openings should not be too large, which is easy to cause excessive ventilation. Leek hair.
3, remove dead leaves. The dead leaves that remain in the soil are the root cause of the leek outbreak. They should be picked up in time and be ventilated to reduce the indoor bacteria source.
4, drug control. Can use 50% carbendazim WP 500-800 times or 40% EB aluminum wettable powder 400-600 times spray control, spray every 7-10 days, and even spray 3 times.
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