Pest control of the latest winter jujube

Winter jujube takes nearly a year from sowing to final harvest. It begins to sow in spring and does not mature until winter. It has strong adaptability and can adapt to all kinds of soil and temperature. Although it has strong adaptability, there are still many diseases in the growth process of a year. What kind of disease will happen to winter jujube? How to deal with these diseases? The details are as follows.

1. Black spot

Black spot is the most common disease in various planting areas, which occurs every year, and the disease is becoming more and more serious. Black spot mainly invades the leaves of winter jujube, and then begins to invade the young fruit when the young fruit appears. Infected fruit leaves will produce a black patch, the pulp is slightly sunken and rotten, the cause of the disease is mainly a kind of bacteria. The high incidence period of black spot disease is in summer, which happens to be a period of high temperature and rain, which is very beneficial to the spread of the disease. Kejukang and other agents can be used for prevention and control.

2. Fruit shrinkage disease

The incidence of fruit shrinkage disease is getting higher and higher in recent years, which is mainly harmful to fruit. When the fruit is infected, there will be yellowish disease spots on the fruit surface and accompanied by halos, and then will slowly sunken, the skin wrinkles no light, the temperature of about 25 degrees is the high incidence period of the disease. Fruit shrinkage disease will also produce insect pests in the later stage, such as stink bugs and other pests will suck at the diseased place to further harm the fruit. If winter jujube is infected with this disease, it should be mixed with insecticides such as insecticide and diniconazole, and fertilization at flowering stage is the best stage to control the disease. The effect is also the most obvious.

3. Rotten fruit disease

The cause of fruit rot disease is mainly caused by the invasion of bacteria and fungi, which is the peak of the disease in summer and summer. High temperature and rain will increase the number of rotten fruit, the main symptom of rotten fruit is different degrees of decay, accompanied by a bad smell, and finally lead to fruit drop. Seriously affect the yield, for fruit rot disease should give priority to prevention, use methyl topiramate and other chemicals for control on the eve of the peak, pay attention to the cooling and drainage of orchards in summer, and try to control fruit trees to maintain the same environment.

4. Anthrax

Anthracnose is a common disease in many fruits. Yellow or brown spots appear on the fruit at the beginning of the disease, which gradually expands and eventually melts to form a large patch. Causes the pulp and kernel to blacken. The disease mainly occurs on the diseased fruit suffering from fruit shrinkage disease. Rainy weather is very easy to spread, and the disease begins in summer. It is also mainly based on prevention, which is prevented by spraying polyoxin and other pesticides in the month of onset.

The above four diseases are the most likely diseases in the growth process of winter jujube, of course, there are more than that, such as bitter acne, canker and so on. The editor only lists a few diseases that are most likely to occur, and the rest of the diseases with less chance of occurrence should be prevented in time. As long as they are diseases, they will harm the growth of jujube trees and harm their own economic interests. For more information, please continue to follow the pro-agricultural network!