Sunburn is also known as the disease of the day. It is a common disease of colored sweet peppers. It occurs mostly in the summer, and it is sporadic when it is light. In severe cases, the disease can reach 30% or even higher. 1, symptoms Both young and ripe fruit can be affected. The sun is burned by the sun on the sunny side of the fruit, and the initial chlorosis. Afterwards, the flesh of the diseased part loses water and becomes thin, forming a glossy and nearly transparent leather shape. Then the diseased part is enlarged, slightly depressed, and the tissue necrosis becomes hard and easily broken. The diseased department is susceptible to infection by bacteria, growing black or pink mold layers, and even rot. 2, the cause This disease is a physiological disease. Mainly due to poor shade of the leaves, the fruit is exposed to strong sunlight, causing the temperature of the peel to rise, and the evaporation of water causes the local temperature of the fruit to rise and burn. Usually, the greater the temperature difference between the sunny side and the shady side of the fruit, the heavier the onset. In the spring, the color sweet pepper is cultivated, and the fruit is swollen and the harvest season is in the midsummer and early autumn. If the soil is short of water, the leaves are not well shaded, the weather continues to dry and dry, or the rain, dew, and foggy days are hot, which may cause the disease. If the planting is too thin, the water and fertilizer are lacking, the plant grows poorly, the pests cause the lack of plants, or the early leaves of the plants are caused, the incidence is heavier. 3, prevention 3.1 Appropriate increase in planting density according to the characteristics of the variety. 3.2 Intercropping with high-stalk crops or using shade nets for planting. 2.3 Increase the application of phosphorus and potassium fertilizer to promote fruit development. During the flowering period, timely and evenly watering, keeping the ground moist and reducing the incidence. 3.4 Control pests and diseases in time to prevent early defoliation caused by pests and diseases. -60C Tuna Freezer 60C Tuna Freezer,Large Capacity Refridgerator,Medical Fridge Chest Freezer,Lab Medical Freezer Guangdong Widinlsa International Co.Ltd , https://www.gdwidinlsa.com