Control methods of spot disease of winter jujube

Winter jujube spot disease, also known as winter jujube brown spot, mainly harms the fruit, can reduce the yield of winter jujube by 20% and 40%, while some of the residual fruits account for more than 60%, causing huge losses to the planting of winter jujube, so how to prevent and control the winter jujube spot? Let's get to know it.

1. Symptoms

Spot disease can be infected when the bean grain of the fruit is large, the needle-like light color to white protuberance appears at the beginning of the disease, and then it becomes larger rapidly, and the bacteria concentration can be seen after the backlog is broken. After that, there will be a variety of disease spots of different shapes, which gradually become larger with the growth and development of the fruit, resulting in rotten fruit or fruit drop in the later stage. If the prevention and treatment is not timely, the sore formed by the diseased fruit is the infection point of fungal diseases, which is very easy to be infected with other fungal diseases, often cross-infected with other diseases, resulting in a large number of rotten fruit and fruit drop in the later stage.

2. The regularity of the disease

The disease is a newly discovered disease in recent years. According to the time of onset and infection characteristics, the infection site should be related to stinging insect pests, such as bug bug and so on. In addition, in the young fruit stage of winter jujube sprouting, Rain Water is larger and the soil water content is higher, which will also lead to the prevalence of the disease. generally speaking, the tree strength is also the key to the severity of the disease. the disease is more serious in the plants with weaker trees than those with strong trees, and vice versa. Through the research in recent years, topdressing in spring also has a certain root system with its disease, especially the massive and frequent application of urea, diamine phosphate and other chemical fertilizers will lead to the imbalance of soil nutrients and aggravate the disease.

3. Prevention and control methods

Increase the application amount of organic fertilizer and potassium fertilizer, improve the soil, and strive to create a good environment for the growth and development of winter jujube through the content of soil organic matter, especially to reduce the application of available chemical fertilizer. It is necessary to renovate the garden fields, especially the weeds and stagnant water beside the ditches, so as to create an environment that is not conducive to the occurrence of diseases and insect pests. In view of the current situation in the field, the prevention and control of the disease should be based on the occurrence law of the disease, seize the current critical time, and strictly control fruit infection. Do a good job in pest control of fruits, such as blind bugs, cotton bollworm, jujube armyworm and so on.

The above is the introduction of the prevention and control methods of winter jujube spot disease, hope to help you, want to know more related knowledge, please pay attention to us.