How to manage jujube during the young fruit stage? Detailed explanation of key technical points
How to manage jujube during the young fruit stage? Guidance for managing jujube during the young fruit stage can refer to the following methods: 1. Watering and topdressing. Because last year the jujube trees shed leaves early and the fruit was harvested late, the tree vigor this year is generally weak, and some jujube trees have severe physiological leaf drop. Therefore, fertilizer and water supplementation must be carried out. Fertilizer supplementation should be done both by applying fertilizer to the soil and by spraying fertilizer on the trees at the same time...
How to manage jujube during the young fruit stage? Please advise
Jujube during the young fruit stage can be managed by referring to the following methods:
1. Watering and topdressing. Because last year the jujube trees shed leaves early and the fruit was harvested late, the tree vigor this year is generally weak, and some jujube trees have severe physiological leaf drop. Therefore, fertilizer and water supplementation must be carried out. Fertilizer supplementation should be done both by applying fertilizer to the soil and by spraying fertilizer on the trees at the same time. Soil fertilization can be carried out together with watering. Generally, each fruiting tree is applied with 0.4-0.5 kg of diammonium phosphate and 1 kg of potassium sulfate. For foliar spraying, urea solution, potassium dihydrogen phosphate solution, Jindazao liquid, etc. can be used. When preventing and controlling pests and diseases, mixing the fertilizer liquid with the pesticide liquid before spraying can not only save labor, but also have a synergistic effect on the pesticide.
2. Preventing fruit drop. Because the tree vigor is weak, the fruit may drop due to insufficient nutrient supply. To reduce fruit drop, 20 ppm naphthaleneacetic acid can be sprayed on the canopy, once every 7-10 days, for 2-3 consecutive sprays.
3. Pest and disease control. The main pests at this stage are green plant bugs, peach fruit borers, and red spiders, among others, and special attention should be paid to their control. If control is not timely, it will cause leaf drop and fruit drop. The following can be used: 25% cypermethrin·chlorpyrifos (Haomiedan) emulsifiable concentrate 800-1000 times solution, or 4.5% beta-cypermethrin (Tianlongbao) emulsifiable concentrate or emulsion in water 1500-2000 times solution, 1.8% abamectin (Funong) emulsifiable concentrate 3000-4000 times solution, 15% pyridaben emulsifiable concentrate 1500-2000 times solution, spraying once every 5-7 days. The main diseases at this stage include anthracnose, jujube rust, fruit shrinkage disease, brown spot, and ring rot. The following can be used for spray control: 30% Longdeng Fulian suspension concentrate 1000-1200 times solution, 50% thiophanate-methyl suspension concentrate 1000-1200 times solution, triadimefon 800 times solution, 77% Duoning 600-800 times solution, and Bordeaux mixture at 1:2:200 times solution. Afterward, according to rainfall conditions, spray more when there is more rain and less when there is less rain, generally once every 7-10 days. Alternating Duoning or Bordeaux mixture with other fungicides gives better results. At the same time, when spraying fungicides, attention should be paid to the quality of spraying. The upper and lower parts of the canopy and the inside and outside of the interior should be covered, especially the undersides of leaves, to improve the control effect on diseases. In addition, for jujube trees with severe iron deficiency, iron supplementation is also needed. When spraying, add Tieduoduo 1500 times solution.
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