Greenhouse leek disease to prevent spread
In the past two years, the epidemic of greenhouse leek has spread, which poses a great threat to leek and winter eel, and should be prevented and treated in time. First, the small water diligence: the epidemic disease spread by the current, such as flood irrigation, due to the poor water absorption capacity of leeks, it is easy to cause indoor humidity is too large, so that epidemic spread. In addition, when topdressing, it is necessary to pay attention to topdressing the application of phosphorus and potassium fertilizers, and more nitrogenous fertilizers will cause the disease to spread. Second, pick net dead leaves: leaves in the soil of dead leaves, is the pathogen of leek disease. When the leaves of the diseased plants are dry and fall on the ground, they must be ventilated in time to reduce the indoor pathogenic bacteria. Third, timely ventilation after watering: indoor temperature is too high, prone to epidemics. So after each watering, ventilation should be timely to reduce the indoor temperature. The air release should be selected at noon on sunny days. The ventilation time should be 2 to 3 hours, and the area of ​​the sheds should be 40 to 50 square meters. The area is too large to be easily ventilated and the temperature and humidity are not well controlled. Fourth, spraying prevention and control: indoor leaves of leek disease, we must promptly carry out chemical control. Can be used 50% carbendazim WP 500 times or 40% EB aluminum wettable powder 400 times spray control, spray once every 7 to 10 days, continuous spray 3 times, you can receive good results. Do not over-concentrate when spraying. Unwrinkled Smooth Film Dressing Frame,I.V. Transparent Dressing,Record Label Transparent Film Dressing,Breathable Waterproof Transparent Dressing Zhende Medical Co.,Ltd , https://www.zdmedicalproduct.com