As the temperature continues to rise recently, it is prone to cause sunburn and burns. However, many farmers are unfamiliar with these two diseases, often confusing prevention and control, and causing losses to production.
Incidence and Symptoms
The sunburn disease usually occurs during the fruit enlargement period and is a physiological disease caused by direct sunlight. At the early stage of disease, the positive side of the fruit changed from green to yellow-green, and partially turned white, followed by a flaming brown-oval or irregular-shaped spot, which later expanded into brown-spotted lesions. The entire course lasts 2-3 days. Gas burning disease usually occurs in the young fruit period, and the location of the disease is not related to direct sunlight. Initially, it showed dehydration, sag, and light brown patches that rapidly expanded into large lesions. The entire process was completed within 2 hours.
Causes
Onset of sunburn is due to the sun's ultraviolet rays, strong light caused by burns, mainly due to prolonged sun exposure to the skin surface temperature is too high, epidermal tissue membrane permeability increased, excessive water transpiration, resulting in epidermal necrosis with sunburn symptoms. Gas burn is caused by "physiological water imbalance" caused by physiological diseases. Under normal circumstances, continuous rain or water, the weather suddenly turned sunny and hot, hot and easily lead to gas burning. This is because the function of the root system is impaired by prolonged soaking, which affects the absorption of water. The high temperature requires transpiration regulation, more water is needed, the plant water needs to conflict with the water supply, and water physiological disharmony occurs.
Prevention
For sun burning and gas burning, comprehensive prevention and control measures should be taken to increase organic fertilizers, increase tree vigor, improve orchard management, enhance the robustness of branches and leaves, and timely irrigation.
Prevention of sunburn disease:
The first is to use a reasonable tree structure to increase the number of leaves, emphasis on summer pruning, leaves 8-10 leaves above the ear, reasonable leaves on the secondary tip to avoid exposure to bright light.
The second is to use a rain-fighting mode of cultivation. This will not only reduce other fungal diseases, but also reduce the direct light of the strong light on the fruit, thereby reducing the temperature of the fruit surface.
Third, the use of bagging methods to reduce the burn of the light on the fruit, while improving the quality of the fruit.
Prevention of gas burning disease:
First, observe the weather forecast in real time, avoid watering before high temperature, and pay attention to timely drainage after rain.
Second, for the orchard to be bagged, try to postpone the bagging time and fully irrigate it before bagging to avoid bagging at high temperatures.
Third, in the high-temperature season, we can adopt the way of interplanting grass in the orchard to reduce the absorption of ground heat, reduce the transpiration on the ground, reduce the temperature of the microenvironment around the fruit, and reduce the occurrence of gas scald disease.
Nutritional Fudge,Fudgesicle Nutrition,Fudge Nutrition Facts,Fudgesicle Nutrition Facts
Guangzhou Etechange Biological Engineering Co.,Ltd. , https://www.etechange.com