The characteristics of crazy jujube disease are very obvious, and they are summarized in the following aspects: First, the fruit has lesions. The fruit is characterized by uneven size and large color differences, including unevenness, loose fruit, and uneven taste. The second is that the roots of the jujube tree have significant lesions. The main rhizome of a diseased tree will produce many new shoots, and over time, many clusters of short, crazy roots will form. Third, the leaves will develop lesions. The leaves slowly turn yellow, and "stem tips" are gradually formed on both sides of the leaves. In more severe cases, the leaves will burst out at the same time.
The other name of jujube tree madness is jujube madness, which is a destructive pest and disease. The specific manifestation is that the flower stems of jujube flowers extend to 3-6 times the normal size. The calyx, stamens, pistils and petals turn into smaller healthy leaves. Duplicate buds and fruit branches in the development stage sprout fine yellow-green branches several times a year, which are not easy to fall off even in the cold winter. , some will continue to sprout many yellow-green tiny branches on the tree trunks and under the trees. This phenomenon is called jujube disease.
Jujube madness is not something that has only appeared in recent years. As early as more than ten years ago, Shandong Province, Shaanxi Province and other strong jujube-producing provinces also experienced this disease, which caused great limitation of jujube trees. Produce. In recent years, jujube fever has been reported by small-scale taxpayers in some places, but the damage caused by jujube fever can be reduced through timely prevention. Why do some jujube trees now suffer from jujube disease? I think the key may be that the nemesis of leafhoppers has been reduced and leafhoppers have become widespread. During their migration and reproduction process, viral infection pathogens will be spread widely.
After a jujube tree suffers from jujube disease, it can mostly be seen through the color change of the leaves of the jujube tree. Moreover, the total output of jujube trees will drop sharply, and the growth rate of jujube trees will become increasingly severe. The weaker it gets, until the entire fruit tree dies after 3 to 5 years. Generally speaking, branches infected with jujube disease need to be cut off and removed immediately, and at the same time, some chemical warfare agents such as triadimefon and fenzofen should be sprayed. The symptoms of jujube madness in jujube trees are not determined by crown diameter. Pruning of many fruit trees may also cause jujube madness.