Under high temperature and high humidity conditions, plants in vegetable production are often in a state of water saturation, which is prone to steepness. Especially the solanaceous vegetables and melons are particularly obvious. After prolonged growth, the vegetative growth is strong, leading to reproductive growth, organ dysplasia and resistance to stress, resulting in high temperature damage, burning young tissues and flowers, fruits, resulting in Production declines and quality declines. In high temperature and rainy weather, the water in the soil is saturated for a long time, which tends to make the root system in anoxic state, causing the roots of the picking and the soil-borne diseases to aggravate, leading to the phenomenon of “dead treesâ€. Prevention:
Solanaceous vegetables: Solanum vegetables are prone to long-term and seedling diseases (sickness, blight and stem-based rot) under high temperature and high humidity conditions. In the management process, it is necessary to control the temperature and control the water, pay attention to the sunshade net and the insect net. After planting, pay attention to controlling the amount of watering, watering to make small water and watering, see dry and wet, prevent excessive humidity, and infect seedling diseases. After the occurrence of seedling disease, you can use the 500 times liquid of the dysentery or the 600 times of the root rot, the rooting and strong seedling agent or the harvesting of the first root; or you can apply the disease-preventing Jianzhibao, the amount per acre. 40 to 60 kg.
Melon vegetables: The management of melon vegetables during this period is mainly to control growth and increase production. In the management process, pay attention to temperature control and water control, to prevent melon vegetables from prolonging and causing melons under high temperature and high humidity conditions. At night, night temperature control should be strengthened, ventilation should be increased, and nutrient conversion and transportation should be strengthened. When applying fertilizer, pay attention to the partial application of potassium fertilizer to increase the yield. Pay attention to prevent disease after the rain. After the rain, it is generally a period of high incidence of diseases such as anthrax, blight, downy mildew and powdery mildew. It is necessary to prevent it in time. You can use methyl thiophanate, chlorothalonil, carbendazim and other broad-spectrum bactericides in time for prevention and control. At the same time, it should be noted that if there is heavy rain after spraying, it should be promptly replenished.
Open-leaved leafy vegetables: Rainproof and timely harvesting of these vegetables. During the rainfall concentration period, pay attention to irrigation and drainage, prevent water accumulation, and cause roots. When the harvesting standard is reached, it should be harvested in time to prevent rain and decay and reduce the value of the commodity.
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