In rural areas, many people will plant some fruit trees at home, such as peach trees, jujube trees, and orange trees. Whether jujube trees should be circumcised is a headache for many farmers. For jujube trees Circumcision is also controversial. So why do jujube trees need to be circumcised? When is circumcision performed? How to perform circumcision? Jujube disease, also known as broom disease and fire dragon disease, is a devastating disease that occurs on jujube trees. Symptoms first appear on the branches and leaves, and then spread to the entire plant. So what are the specific symptoms of jujube disease? How to prevent and treat it? Time and method of circumcision of jujube trees

①Effects of circumcision

Many people believe that circumcision can promote fruit setting and young fruit development of jujube trees, increase fruit setting rate, reduce flower and fruit drop, and increase the growth rate of jujube trees. Ring cutting of jujube trees during the flowering period will ensure consistent fruit size regardless of tree age. This will not only reduce flower and fruit drop, increase fruit setting rate, but also make the fruit more beautiful in appearance, increase soluble solids and sugar content, and improve quality. Therefore, weighing the pros and cons from the overall yield, fruit nutritional value and taste, it is completely necessary to perform ring cutting during production.

②Girling time

When it comes to choosing the time for girdling, most people think that the most suitable period is the early or full flowering period, when one-third of the whole tree's flowers are in bloom. About one month or so, or when most jujubes have 4 to 5 hanging flowers, it is the period when the flowers are of the best quality, with a large number of fruits, large sizes, consistent maturity periods, and high commercial value. In recent years, there has been further understanding of this issue. It is believed that the flowering period of winter jujube is earlier than that of ordinary jujube varieties. The temperature in the early stage of flowering may not necessarily reach the critical point of fruit setting, so it must wait until the temperature stabilizes above 24 degrees. Some people also think that the girdling time of winter jujube should be 2 later than that of other jujube trees. ~3 days.

③Change the method

Before girdling, you must prepare tools, mainly including sickles, nail openers, girdling knives, etc. The most commonly used in the market is a multi-functional jujube Tree nail opener, which consists of a handle, three U-shaped knives and a pointed blade. The large U-shaped knife can scrape old bark, the small U-shaped knife is used to open nails, and the pointed blade is mainly used Remove stubble and repair gaps. During girdling, peel off one circle of old bark at the lower part of the trunk, then peel off the old bark part, use a sharp knife to girdle twice around the trunk, reaching deep into the xylem, peel off the ring-shaped tender bark, and finally use plastic glue to Bandage the wound well to prevent germs from invading and causing infection, which may affect the wound's healing again. Prevention and control measures of jujube disease

1. Symptoms of jujube disease

1. When the disease occurs at the roots, a large number of adventitious buds will germinate, often forming clusters of short buds. Roots, multiple clusters of crazy roots may appear on the same root. In the later stage, the diseased root cortex will rot, and in severe cases, the entire plant will die.

2. Branch disease occurs when the main buds and auxiliary buds germinate at the same time to form developing branches, and the branches and leaves are clustered, the leaves turn yellow, the leaf edges are rolled up, and the leaves are hard, brittle, and dull. Buds on new branches can sprout multiple times, forming clustered branches that are thin, short internode, and have small, yellow leaves.

3. The leaves are diseased. The diseased leaves that grow after flowering are narrow and long, have dark veins, are light green, and are easy to scorch. Sometimes a small dark vein piece grows on the midrib on the back of the leaf, which looks like Mouse ear shape.

4. Flower organ disease will cause atavism, with pedicels, sepals, petals, stamens, and pistils degenerating into thin branches, leaves and other vegetative organs.

2. Pattern of incidence

The pathogen of jujube disease runs from bottom to top during germination and from top to bottom after the branches stop growing, often causing disease in the whole plant. Popularity is related to variety and management. Because there are certain differences in disease resistance among different varieties, some varieties have a high incidence of disease. In addition, jujube disease is often prevalent in jujube orchards with dry and barren soil, poor fertilizer and water conditions, extensive management, severe pests and diseases, and weak tree vigor. .

3. Prevention and Control Measures

It is necessary to clean up crazy branches in time, eradicate diseased plants with no economic value, select varieties with strong disease resistance as grafting rootstocks when planting, and strengthen inter-garden management at the same time. , increase the application of alkaline fertilizer and farmyard manure. In the early stage of the disease, a hand drill can be used to drill holes in the roots and stems of diseased trees. During the budding period of jujube trees in spring or in October, 500 ml of tetracycline solution with a concentration of 0.1% should be dripped into each diseased tree. Or drill a hole on each side of the base of the trunk or the middle and lower parts of the unscarred joints, reaching as deep as the pith core. The vertical distance between the two holes is 10 to 20 centimeters, and use a high-pressure syringe to inject a solution containing 10,000 units of oxytetracycline.