The cause of the disease: Under normal circumstances, jujube trees begin to drop fruit in the young fruit period, but the severity of fruit drop is inextricably linked with the climate, management, fertilization, watering, nourishing, soil and other factors. The trees in the jujube garden that do not open, snafu, grow long, and are not airy and light are heavier; fruit content is too single, or there is too much of one element, resulting in malnutrition, leaf hypertrophy, and jujube hanging. Severely, sand lands with poor performance in conservation and jujube gardens with woody jujube hanging results in serious fruit drop due to loss of water and insufficient supply of nutrients. In addition, ringworm disease, fruit shrinkage, sunburn, etc. can also cause jujube tree fruit drop. Control methods: 1. Top dressing. The results of the tree each application of "three elements" compound fertilizer 1.5 ~ 2 kg + "Wau Feng source" trace elements 0.5 to 1 kg, points 4 to 8 points Shi. 2. Leaf spray fertilizer. Spray 0.3% potassium dihydrogen phosphate solution or 0.3% urea solution, once every 7 to 10 days, and spray 2 or 3 times. This method can enhance the function of the leaves, increase the single fruit weight, improve the quality, and reduce fruit drop. 3. Naphthalene acetic acid. From the middle of July, the canopy sprayed 15 to 20 μg/ml naphthylacetate at intervals of 15 to 20 days for a total of two times. Heavy Duty Pvc Coated Gloves,Oil Alkali Resistance Gloves,Working Hands Pvc Gloves,Pro Cleaning Coated Gloves JINAN SHANDE SECURITY TECHNOLOGY CO., LTD , https://www.sdsxlb.com