A long period of rainy weather in the flood season will cause excessive moisture in the shed and water accumulation in the field, leading to the spread of vegetable diseases. Farmers should do the following to reduce disaster losses:
Clearing the gutters and draining water should continuously strengthen the gutter drainage in order to reduce the groundwater level and the humidity in the field, minimize the time for the accumulation of vegetables, and promote the normal growth of roots.
The use of rain-fence cultivation is to open the skirts of plastic greenhouses on both sides, retaining the cultivation form of the greenhouse cover membrane, to avoid direct rain leaching and field water accumulation, to prevent excessive soil moisture, can effectively reduce the incidence of diseases, ensure high yield and stability of vegetable production. The conditions can be combined with the use of insect nets to cover the gauze around the shed, which basically eliminates pesticides.
Strengthen field management to timely remove old leaves, diseased leaves, and diseased fruits, remove diseased plants, and remove concentrated treatments in a timely manner; increase application of phosphorus and potassium fertilizers and topdressing human manure and urea and other thin fertilizers to enhance growth potential, promote root growth, and delay The market time; the long-term decline in the field due to long-term decline in the vegetable land to plough the Qingchuang, loose soil weeding, timely rush to broadcast fast-growing vegetables to meet market demand; strengthen pest control. Prompt and reasonable use of drugs, selected quasi-pharmaceuticals, medication time, concentration and methods, but also should pay attention to the use of agents alternately, it is strictly prohibited use of methamidophos, omethoate and other highly toxic high-residue pesticides.
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