Most of the northern Shaanxi and Guanzhong provinces in recent days have experienced sand and windy winds. The wind power in some areas even reaches 7-8. Windy weather has caused a certain impact on the production of vegetable facilities, especially for large and medium-sized arched watermelons and melons. Greater impact. According to melon farmers, winds have caused the shed film to be torn, the scaffolds have suffered various degrees of damage, and the watermelon and melon plants in the shed have also been damaged.
At present, most arched watermelons and melons are in the stage of flowering fruit setting or fruit development, and are sensitive to changes in environmental conditions such as temperature and light. In order to mitigate the adverse effects of wind disasters on Shek Pik watermelons, melons on the market, quality and yield, it is recommended that the following measures be taken in each watermelon and melon production area.
The minimum temperature required for repairing sheds, melons, fruit set and fruit expansion is 15°C. Therefore, damaged scaffolds should be promptly repaired after the storm. Replacement of the shed film should be replaced as soon as possible. Press the film line. After the arch shed is repaired, timely ventilation shall be taken during the day so that the air temperature in the shed does not exceed 30-35°C. At night, the ventilation openings should be closed to maintain the temperature within the shed within 15-20°C.
After the turmoil has been destroyed, the melon vines that have been disturbed by the strong winds should be righted, rooted, and crushed; the branches and leaves that have been broken and damaged should be cut off; the damaged young larvae should be removed early and the fruit shape should be left as Fast-growing, pest-free, non-injured young larvae. At the same time, combined with foliar spray fertilizer, the sediment adhering to the leaves of the plants is rinsed clean.
Foliar Spray Fertilizer The wind-fighting watermelon and muskmelon plants should quickly supplement the nutrient through foliar spraying to promote wound healing and restore various physiological functions as soon as possible. Can spray 0.2% -0.5% potassium dihydrogen phosphate solution or other multi-element foliar fertilizer to the stems and leaves. When spraying, the concentration of fertilizer liquid should not be too large, so as to avoid causing new damage to the leaves.
After the prevention of diseases and the sudden changes in the external environment, the sheds and melons are easily infested by pathogens, resulting in diseases such as anthrax, downy mildew, viral disease, bacterial keratoses, and bacterial fruit rot. Administration of thiophanate-methyl, mancozeb, virus A, and streptomycin for prevention should be conducted early in the management.
Appropriate early assault on watermelons and melons after a strong wind, plant growth is often inhibited, should be given more than a few days in advance of the appropriate impact of the fruit fertilizer, pouring fruit water. Each 667 square meters can apply about 30 kilograms of nitrogen, phosphorus and potassium compound fertilizers, timely watering after topdressing, the amount of water should not be too large, to the extent of water after the field is poured. With drip irrigation, the fertilizer can be completely dissolved and applied with drip irrigation twice.