How to control grape acid rot

Planting grape will cause many diseases, which will harm grape leaves, fruits, flowers and other organs in varying degrees, which will have a great impact on the growth of grape plants. Among them, acid rot is a kind of disease, which occurs every year in all parts of our country. And the victimized area is not small. Will make the grape fruit rot in a large area, affecting the yield and quality, so what are the symptoms of acid rot? How to prevent and cure it? Let's have a look!

1. Symptoms

Acid rot mainly harms the grape fruit. After the fruit is infected, it will be found that the pulp and peel of the diseased fruit can not be bonded. The wound will also turn white, the flesh will rot, and there is liquid outside the peel accompanied by an unpleasant smell, which will gradually flow out of the fruit at a later stage. And there will be some red bugs around the fruit, which have been identified as small vinegar flies. And after the liquid flows out of the fruit, the places it passes through, such as leaves, flowers and branches, will begin to rot. Finally, it led to the necrosis of the whole plant.

2. Prevention and control methods

Reduce damage: this disease often occurs in all kinds of cracked fruit and cut fruit, so we should reduce the phenomenon of fruit cracking. Fruit cracking is most likely to occur when the soil is flooded in continuous dry weather, or rainfall. We should maintain regular watering work, replenish water in time in dry weather, and pay attention to drainage if there is too much stagnant water. In the growing period, we should pay attention to the application of calcium fertilizer, because grapes lack of calcium fertilizer will also appear fruit cracking and other phenomena.

Control of diseases: a large part of the occurrence of acid rot is caused by other diseases, such as anthrax, gray mold and so on. Therefore, while preventing and controlling acid rot, we should also do a good job in the prevention of other diseases. the high incidence period of these diseases is during the period of grape ear sealing and bagging, because drugs cannot be used after bagging. However, the disinfection of orchard fruits has not been done well before bagging, and the permeability in the bag is poor and the temperature is high, so it is easy to breed diseases. Rotten fruits and diseased fruits should be removed in time to reduce the spread of pathogens.

Strengthen management: strengthen the management of the orchard is the most basic, we will have a bad habit when planting, that is, we like to plant different varieties of grapes together. In fact, this is not right, because different varieties, its growth stages, nutritional requirements and even disease hazards will be different, resulting in some early-maturing varieties with high incidence of diseases and insect pests to transmit diseases to late-maturing varieties, in which there may be acid rot. In the process of topdressing, we should pay attention to the application of nitrogen fertilizer, not partial application, to prevent excessive growth. Then pruning and pruning is carried out in time to improve the permeability of the orchard and prevent the growth of bacteria.

The above is a brief introduction to the symptoms and control methods of acid rot, which is a secondary infectious disease with great harm to grapes and strong infectivity. In serious cases, it may cause the whole orchard to be infected, resulting in extinction. Therefore, we must do a good job in prevention and control, and reduce the incidence of various diseases, as well as some physiological phenomena, such as fruit cracking, in order to effectively prevent the occurrence of acid rot and improve yield and quality.