How to treat winter jujube disease

Winter jujube is a very common fruit, sweet and crisp taste, very popular. When planting winter dates, attention should be paid to preventing some diseases. So how to treat winter jujube disease?

1. Winter jujube fruit shrinkage disease

Because the fruit shrinkage disease of winter jujube is mainly infected by fungi in the early stage and mainly infected by bacteria when the fruit is nearly mature, pesticides must be added to control pests (leafhoppers, stink bugs, ticks, etc.) in the later stage to prevent invasion from wounds. In July, we should pay attention to control piercing-sucking pests. We can spray Lvheng 6 1000 times twice in 8-10 days, and the control effect can reach more than 95%. In August and September, the control effect was more than 95% by spraying pesticide (such as kungfu) and diniconazole 3000 times. Can also spray methyl thiophane 800 times solution plus streptomycin control, the effect is also good. Boron malnutrition of winter jujube will aggravate the occurrence of fruit shrinkage disease. Boron fertilizer can be sprayed at flowering stage, and then mixed with fungicides, bacterial fungicides and insecticides from young fruit stage, which can also achieve better control effect.

2. Winter jujube fruit rot disease

Fungi and bacteria were the main pathogens causing fruit rot, and fruit rot symptoms were divided into "black furuncle type" and "pulp rot type". The infection peak was from July to September, and high temperature and humidity could cause fruit rot. The control of fruit rot disease should start from the end of June and the beginning of July. It can be controlled by spraying 800 times solution of 70% thiophanate-methyl, 600 times solution of 50% carbendazim, 400-600 times solution of Lunwen No.1, 1500 times solution of Lexiaowei, Bordeaux mixture, Ludebao and Mengshi alternately.

III. Colletotrichum gloeosporioides

Commonly known as burn eggplant disease, scorched leaf disease. The fruit initially appeared pale yellow reddish brown water-stained spots, gradually expanded to form yellow halo, then the flesh turned brown or black brown, and the fruit core turned black. Most of the cases are secondary parasitism on the contracted fruit and diseased fruit. It can spread when there is rainfall around the middle of May, and it begins to occur from late July to late August, and it is heavy in rainy years. 70% thiophane methyl 800 times solution, fuxing 8000 times solution, doxycycline 1000 times solution, gaisheng 800 times solution or xiansheng 600 times solution can be used for control.

4. Winter jujube bitter pox disease

Winter jujube disease consequences will appear dark green or light red irregular patches, flesh was spongy necrosis, disease fruit disease site slightly concave. The disease is mainly caused by calcium imbalance physiological disease, fruit growth period can be used 0.2% calcium nitrate, boron zinc calcium, fruit four-in-one spray.

Winter jujube different diseases, different methods of prevention and control, according to the actual situation to do a good job of prevention and control.