Key Technical Points for Foliar Topdressing After Persimmon Trees Set Fruit
Timely fertilization: When the fruit's transverse diameter reaches 4-5 cm and when the fruit size has basically become fixed, apply fruit-swelling fertilizer and pre-harvest fertilizer, mainly with quick-acting, quick-dissolving nitrogen-phosphorus-potassium fertilizer. For bearing trees over five years old, apply 1.5-2 kg of urea and 0.75-1 kg of potassium dihydrogen phosphate per tree, or 1-1.5 kg of nitrogen-phosphorus-potassium compound fertilizer, broadcast after rain, or...
Timely fertilizationWhen the fruit's transverse diameter reaches 4-5 cm and when the fruit size has basically become fixed, apply fruit-swelling fertilizer and pre-harvest fertilizer, mainly with quick-acting, quick-dissolving nitrogen-phosphorus-potassium fertilizer. For bearing trees over five years old, apply 1.5-2 kg of urea and 0.75-1 kg of potassium dihydrogen phosphate per tree, or 1-1.5 kg of nitrogen-phosphorus-potassium compound fertilizer, broadcast after rain, or drench with 60-80 kg of clear water, or drench with 40-60 kg of decomposed composted manure water, or dig ring-shaped trenches 20-30 cm deep and 20-30 cm wide around the drip line of the canopy and apply. Before fertilizing, all kinds of weeds on the tree disk must first be removed. After fertilizing, cover the tree disk with rice straw or other weeds, with a grass thickness of 3-5 cm, to improve the fertilizing effect.
Disease prevention and pest control
In the middle and late stages of fruiting of persimmon trees, the fruit is susceptible to anthracnose and brown spot, causing a large amount of fruit drop, with the fruit surface covered with black spots. Therefore, when the fruit's transverse diameter reaches 3-4 cm and 6-8 cm, spray once each time with an 800-fold aqueous solution of Shibingke, or a 1000-fold solution of 50% Sukeling wettable powder. During the fruit ripening stage, if there is damage by scale insects, spray 2-3 consecutive times with an 800-1500-fold aqueous solution of Jiesijing, or a 1000-fold aqueous solution of Supusha, for control. During the period of autumn shoot sprouting, when the new shoots just begin to bud, unfold leaves, and turn green, spray once each time with a mixture of 800-fold trichlorfon and 1000-fold dichlorvos to control various diseases and pests that harm the new shoots.
Foliar topdressing
In the middle and late stages of fruiting of persimmon trees, every 15 days or so, spray the foliage once with an 800-fold organic humic acid active liquid fertilizer of Gaomeishi, a 1500-fold mixed solution of enhanced Yunda-120, or a 500-fold mixed solution of plant vitality essence and a 2500-fold mixed solution of Yiwei yield-increasing bacteria, or a mixed solution of 0.1% magnesium sulfate, 0.2% urea, 0.3% potassium dihydrogen phosphate, and 500-fold Lufeng 95, spraying 3-5 times consecutively, evenly wetting all branches, leaves, and fruit, until water droplets begin to drip.