Continued high temperature weather, grape disease should be the right medicine

The temperature in the summer stays high, which is easy to cause the disease and burning of the grapes. These two diseases are often confused by fruit farmers and cause losses to production. The following is an analysis of the onset characteristics and manifestations of gasburn disease and Japanese fever, and specific prevention measures are proposed. Japanese rot disease generally occurs during fruit enlargement and is a physiological disease caused by direct sunlight. At the beginning of the disease, the positive side of the fruit changes from green to yellow-green, and the part becomes white, followed by a burning brown oval or irregular shaped spot, which later expands into a brown depression. The entire course lasts 2 to 3 days. The control measures are as follows: 1. After planting the grapes on the scaffolding, the fertilizer and water should be increased to make it grow rapidly. In the second year, the scaffolding tree shape is formed, so that the ears grow under the frame surface to avoid direct sunlight. 2. Watering grape fruit setting period is low rain and high temperature season, air drying, most prone to daily burning, should be watered in moderation, reduce the temperature in the garden, reduce the daily burning damage. 3. Fertilizer and water management Grapes should be fertilized with water, organic fertilizer should be added, water should be watered at the right time, pests and diseases should be well controlled, the tree body should be strong, and the ability to resist disease can be enhanced. 4. Fruit surface protection Before flowering, the flowers are separated in time. Remove excess fruit, spray the bag-free film after thinning the fruit, and match the bag to protect the fruit surface from direct sunlight and reduce the damage of the fruit surface. Gasburn disease The disease usually occurs in the young fruit stage, and the diseased part has nothing to do with direct sunlight. Initially expressed as dehydration, depression, light brown spots, rapidly expanded into large areas of lesions, the entire process was completed within 2 hours. The control measures are as follows: 1. The leaves are large and large, the roots are weak, and the orchards with uncoordinated proportions on the ground and underground need to remove the dense branches, keep the garden loose and breathable, and adjust the soil moisture not too large. 2. Spraying time in high temperature weather before 8 o'clock in the morning or after 5 o'clock in the afternoon, spraying at high temperature is easy to cause gas burning at the drop of the drug, and it is often mistaken for phytotoxicity. 3. The recent fruit thinning work is best carried out in time after the physiological fruit drop. The orchard that cannot be timely fruit thinned should avoid the fruit thinning during the high temperature period. 4. Do not bag too early, the bagging is too early and the temperature inside the bag is too high to increase the incidence of gas burning. 5. High-temperature weather irrigation should be controlled in the evening, and the amount of irrigation should not be too much, and sprayed with no bagging film to form a polymer film to optimize the water absorption, ventilation and light transmission quality of plants. Blocking pests and smuggling signals and weakening the media to resist and defend against natural environmental disasters. (earth)

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