When do jujube trees usually blossom and lose their leaves? How to treat the yellow leaves? What kind of medicine should I take?

Jujube trees grow in mountains, hills or plains below 1700 meters above sea level. It is widely cultivated. This species is native to China and is often cultivated in Asia, Europe and America. So in which month do you usually blossom and shed leaves? How to treat it? What kind of medicine should I take? According to Rhamnaceae data, jujube flowers yellowish green, bisexual, glabrous, with short total pedicels, solitary or dense into axillary Cymes. The flowering period is from May to July and the fruiting period is from August to September. Jujube trees usually begin to shed their leaves in late October and fall out around the middle of November.

How to treat the yellow leaves of jujube trees?

1. Strengthening management, digging deep into the soil and applying more organic fertilizer can bury sulfur under the tree, which can not only adjust the pH of the local soil, but also kill bacteria and insects.

2. When irrigating, citric acid, glacial acetic acid, boric acid and phosphoric acid can be added to water and fertilizer to adjust the PH value of water quality to make it acidic, so that plants can absorb iron ions more easily and the probability of chlorosis will be reduced.

3. According to the tree size, combined with autumn fertilization, each jujube tree is topdressing 100-250 grams of ferrous sulfate.

4. In the period of branch and leaf development of jujube, the method of foliar topdressing in the morning and evening was used to supplement iron, and 1000 times of ferrous sulfate solution was sprayed on the leaf to promote the direct absorption of the leaves. Spray every 10 days for 3-5 times.

What kind of medicine does jujube tree take?

Disease:

Jujube mad disease can be cured in the same year and bear dates in two years by injecting liquid into the trunk of Jujube Mad No. 1 and Jujube Mad No. 2. Regular spraying of compound Zaohongbao can reduce the incidence of fruit shrinking disease from more than 80% to less than 15%. Other diseases were sprayed under the trees of the whole orchard before sprouting, and the other diseases were sprayed with 5 Bordeaux stone sulfur mixture under the trees in the whole orchard before sprouting. In the middle and last ten days of June, mancozeb, verapamil and trimethoprim EC were sprayed every 15-20 days in early July. a total of 2-3 times, in late July, spraying Bordeaux solution, other diseases can be controlled.

Insect pests:

After sprouting in spring, jujube gall midge should be controlled with dichlorvos plus thiazuron before rolling leaves. If the first generation is sprayed again on the 10th day after the occurrence of the first generation, the occurrence of future generations can be controlled. Before and after the wheat harvest, the newly hatched larvae crawl out of the mother, and the wax shell has not yet secreted wax. Omethoate is used to control the critical period. When jujube bugs occur, the enemy is used to kill EC to prevent and control. Pyrethroids were used to control the occurrence of jujube buqu and diamondback moth. From July to October, longicorn beetles can kill longicorn beetle larvae by scraping off the topsoil around the root neck with a small shovel, finding the wormhole, injecting dichlorvos emulsion or pyrethroid pesticides into the wormhole with syringe, and blocking the wormhole with soil.