Symptoms and control of the latest dry rot of jujube

Jujube has rich nutritional value, in our life is a better tonic, with the effect of nourishing blood and beauty. Jujube planting in China also has a relatively mature technology, but if jujube planting is not managed properly, it will suffer from many diseases. The dry rot that the editor is going to talk about today is a kind of disease. Dry rot can seriously harm the growth of fruit trees and lead to a substantial decline in yield. The editor brought the symptoms and control methods of jujube dry rot today. Let's have a look!

1. Symptoms

Dry rot is mainly harmful to the branches of fruit trees, there will be round dark spots on the main branches of adult trees, and the edge of the spot is dark. The sick part is protruding, can be easily torn off by hand, and relatively moist, will gradually dry in the later stage, and the disease will be sunken. This is just a symptom, and another is that both young and adult trees occur, usually after frost injury. Purple disease spots will appear on the branches, and then begin to crack, appear water shortage symptoms, the surface is uneven, the disease spots will gradually expand, the sick young trees will die quickly.

2. Prevention and control methods

Strengthen management: the most important thing is to strengthen the management of the orchard. After harvest, the basic fertilizer of the orchard should be fully applied, the proportion of chemical fertilizer should be reduced, and the content of farm manure should be enhanced. In particular, it is necessary to control the amount of nitrogen fertilizer to prevent excessive nitrogen fertilizer from causing jujube overgrowth, which is not conducive to the return of nutrients. Improve the resistance of trees, strengthen the ability of disease resistance, clean up the fallen leaves, fruits and disease residues in the orchard in time, prevent the breeding and spread of pathogens and reduce the incidence of disease.

Reduce pathogen

When overwintering, it is necessary to do a good job in clearing the orchard in time and clear all the fallen leaves out of the orchard for treatment. Many friends will turn all the fallen leaves into the soil as fertilizer, in fact, although it increases the organic matter in the soil, it also provides conditions for the growth of bacteria, so we still have to clear it out of the orchard. In autumn and winter, spraying stone sulfur mixture and other drugs on the trees to improve the low temperature adaptability of jujube trees. Prevent frost injury during overwintering, indirectly cause dry rot, and effectively kill insect eggs.

Shaping and pruning

Jujube is a kind of big fruit tree, so it is very important for us to prune it in the process of planting. Reasonable pruning can not only enhance the growth of the tree, but also improve the permeability of the orchard and enhance the utilization rate of light. Because if the growth of the tree is too weak, it will make the bacteria invade. It is beneficial to the flower bud differentiation of fruit trees and reduce the incidence of disease. Proper thinning of flowers and fruits can effectively improve the yield and ensure the quality.

The above is a brief introduction to the symptoms and control methods of dry rot, which is very harmful to trees and can even rank in the top few among diseases and insect pests. It is something we must pay attention to in the process of planting jujube trees. We must hope to achieve high yield and high quality when planting jujube trees in order to maximize their own economic interests, so I hope that everyone can manage the orchard well, not only dry rot, but also reduce the incidence of various diseases and insect pests.