Jujube trees are known to have seen this small leaf disease occur in large numbers in some areas in recent years. It didn't seem like much of a problem, but I didn't expect it to be very contagious. An orchard has an infection around one. If you look closely, you will find that it is not actually lobular disease. This problem comes from the flower mutation.
The flower organs of diseased trees degenerate into vegetative growth, showing obvious small branches, and the sepals and flower organs become leaflets, turning the fruiting part into small dense clumps. Flowers generally do not bear fruit, and even if the results have no economic value. Although the healthy branches of the diseased tree can bear fruit, they cannot be eaten.
At the beginning of the disease, it is mostly from a few large branches and root tillers. There are also whole trees that have the disease at the same time. Often from the local to the whole tree, after the onset of the disease small tree 1-2 years, large tree 3-4 years, that is, death, there are some can be maintained to about 5 years. Eventually dies.
Pathogens are transmitted through grafting and leafhopper vector insects. The shortest incubation period after grafting a diseased branch is left. There are also up to a year long. Our common insects such as leafhoppers and concave-edged rhombus leafhoppers are the main propagators of pathogens. Contact with soil, pollen, seeds, sap and diseased roots has not been transmitted. The pathogen runs from bottom to bottom at the time of germination, and the branches stop growing from top to bottom.
Prevention measures, strengthen quarantine and strictly select disease-free rootstocks, scion and mother plants as propagating branches. Remove diseased trees and cut down diseased branches to eliminate pathogens. Planing the roots must be thorough. If there are rhizobium, use glyphosate to kill. Only a complete removal from the root cause can it be cured.
Xiaobian's advice hopes to help fruit grower friends. It can also be forwarded to let more people benefit. Everybody can. Leave a message to discuss.