Summer Solanum Vegetables Beware of Sunburn
There are more hot weather in summer, and solanes and fruit vegetables often appear sunburn. Among them, pepper vegetables are most likely to occur. After the peppers have been burnt by strong light, they often appear rotten on the sunny side of the fruit. At the beginning, the diseased part appears dark brown, and then the diseased part gradually turns brown, and finally the diseased part becomes white. After a slight expansion, white or light brown, thinning of the cortex, tissue necrosis, and thereafter susceptible to fungal infection, the occurrence of Ailide black mold, high humidity often lead to bacterial infection and the emergence of the entire fruit rot, loss of commercial value. Therefore, protective measures must be taken in advance in the summer to prevent the occurrence of sunburn disease in eggplant vegetables. The main points should be as follows:
First, strengthen efforts to release air. When the temperature during the daytime is high in summer, the air outlets at the upper part and the front face of the greenhouse shall be fully opened, and the air release shall be strengthened to reduce the temperature inside the greenhouse. After the air outlet is opened, it is necessary to pay attention to tighten the pull rope for adjusting the air outlet so as to avoid the wind blowing off the air outlet after the person leaves the air outlet, thereby causing a high-temperature hazard.
Second, set the shade net. High-temperature weather should be set on the top of the shade net in time to reduce the intensity of light in the shed. But pay attention to the shade net can not be covered all day, so as to avoid insufficient lighting in the shed. General shade nets should be set before 10am and before 3pm. In sunny weather after the rain, sunburn is most likely to occur. Therefore, after a sudden sunny day after the rain, shade nets should be covered in time to prevent sunburn.
Third, reasonable sparse leaves. Solanaceous vegetables in summer should be light and sparse, so that the fruit is hidden under the leaves as much as possible, avoiding direct sunlight. The peripheral leaves of the plant cannot be removed, but the inner leaves must be removed to increase the air permeability inside the plant. Special attention should be paid to the following: after curing, wiping out, and rinsing the leaves, the fruit often suffers from sunburn due to sudden exposure to sunlight. Therefore, when Solanum vegetables are used in high temperature weather, they must be avoided at high temperatures at noon. It is better to choose after 3 pm. In addition, when the summer vegetables are planted, the spacing of the plants should be dense, so that the stems and leaves can be sheltered from one another and the fruits can be prevented from direct sunlight.
Fourth, timely watering. In the case of excessive temperature in the shed and large amounts of soil and soil evaporation, we must pay attention to timely watering to ensure adequate water supply to the vegetables in order to avoid sunburn.
Fifth, timely addition of trace elements. When the fruit starts to expand, if the calcium, magnesium, boron, zinc, manganese, iron and molybdenum and other micronutrients are insufficient, the lightfastness of the peel will be reduced, and therefore sunburn may occur easily. Therefore, in the summer, Solanum vegetables should be supplemented with foliar fertilizers containing trace elements in time, and foliar sprays such as Ruilv or Ruipei Calcium or Ruipeile et al., or Lvfenwei No. 2 foliar fertilizers, etc., can promote fruit tolerance. Sunburn's resistance to reduce the incidence of sunburn.
6. When the disease is found, it must be removed in time to prevent the infection of other pathogens in the wound due to the high humidity in the shelter. For the fruit of infected bacteria, it should be promptly sprayed with 1,000 times of chlorothalonil.
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