How to manage the young fruit period of winter jujube?

How to manage the young fruit period of winter jujube? Please help guide the young fruit period of winter jujube can refer to the following methods for management: 1, to prevent fruit drop. In the later stage of young fruit expansion, the fruit often falls due to insufficient nutrition supply. in order to reduce fruit drop, in the first and middle of July, the canopy was sprayed with 20ppm naphthylacetic acid and 0.3% potassium dihydrogen phosphate, and 0.3% urea solution was sprayed if there were symptoms of nitrogen deficiency. Once every 7 or 10 days, spray once or twice. 2. Reasonable topdressing. After setting fruit, winter jujube should be watered in time and added compound fertilizer or organic compound fertilizer rich in nitrogen, phosphorus, potassium, iron, boron, calcium, zinc and other essential elements and trace elements of winter jujube. Generally, young trees apply 0.2-0.3 kg diammonium phosphate and 0.5 kg potassium sulfate. Fruit trees double, ring multi-point application. Promote foliar fertilizer spraying, such as jujube Tefeng 800 times, 0.3% potassium dihydrogen phosphate, Ruilu and so on. 3. Timely prevention and control of diseases and insect pests. The main pests in this period are peach heart borer, red spider and green blind Toona sinensis and so on. Special attention should be paid to prevention and control. If the control is not timely, it will seriously cause fallen leaves and fruits. You can choose Suechongqing 2000 times or Wanling 3000 times + 1.8% avermectin EC 3000 times for control, spraying once every 5-7 days; the main diseases in this period are jujube rust, spot leaf disease, ring disease and so on. The following formulations can be selected, such as 100,140 units of agricultural streptomycin + Polaroid 1000-fold solution or ketoconazole + triazole copper 800-fold or terprazole 800-fold solution for spray control, once every 10 days for 3 times. All kinds of pesticides are used alternately to improve the control effect. In order to supplement iron for jujube trees with serious iron deficiency, each tree can be sprayed with 20g of Aohe iron or 1500 times dilution. Click to get more jujube planting techniques click to get more fruit planting techniques