Sheds tend to have premature senescence in the late stages of growth, resulting in reduced yields and decreased quality. In order to prevent the premature decline of greenhouse vegetables, we must clarify the following three causes of premature aging and timely prevention and treatment:
First, premature aging caused by deficient fertilizer, fertilizer and water supply caused by premature aging, such as premature aging of defertilization and premature aging. Before the planting of the vegetables, the base fertilizer should be applied to ensure adequate nutrition for the growing period of the vegetables. Generally, 15 to 20 cubic meters of fermented chicken manure and 100 kilograms of high-quality potassium sulfate compound fertilizer are used in Mushi, and then 3 kilograms of carbendazim are applied. After entering the result period, it is necessary to replenish with water and timely supplement the plant nutrition. Watering should be done in the morning with good weather. After the watering is completed, there should be 2-3 days of sunny days. After watering, it should be heated and then ventilated to avoid premature aging caused by excessively low temperature. Also note that the amount of water should not be too large for each time to prevent rooting.
Second, growth disorders, premature aging, planting vegetables in the winter season, due to low temperature, slow plant growth and growth are slow, when the plant growth is weak, can be sprayed with brassinolide; leaves can be sprayed with cytokinin when yellow; prevent Root premature aging can be sprayed with 6000-8000 times more love to promote root growth. During the fruiting period, it is necessary to leave fruits at a reasonable level, pay attention to the balance between vegetative growth and reproductive growth, and do not leave too many fruits to cause falling trees. Pay attention to timely harvesting. In order to promote the early fruiting of the plant, solanaceous vegetables and melon vegetables promote early harvest of fruits, which can not only reduce the consumption of nutrients, but also prevent premature aging of the plants and promote the plant's multiple results. In addition, we must pay attention to the protection of the lower leaves. After the fruit is harvested, the lower leaves should not be completely removed, so as to avoid causing the plant roots to lack the nutrient supply of the leaves and premature aging.
Third, pests and diseases Premature dying The prevention of pests and diseases should be carried out as early as possible. The common diseases on the winter eggplant vegetables are tomato early blight, late blight, leaf mold and pepper vegetables, bacterial leaf spot, etc. It should be noted that early prevention and early treatment, early control of the spread of the disease. At the time of disease initiation, early blight can be controlled by 58% metalaxyl Mn-Zn spray; late blight and epidemics can be controlled by 72.2% of Prec 600x spray; leaf blight and bacterial leaf spot can be used 47 % of Garrinone spray control.
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