How to manage chestnut trees during the fruit expansion period? Key technical points explained in detail
How to manage chestnut trees during the fruit expansion period? Please give an introduction. Summer and autumn are the period when chestnut fruits expand rapidly, so fertilizer and water management and pest and disease control must be strengthened to allow the fruits to expand fully, the flesh to be plump, no fruit drop in the middle period, and good fruit quality, thereby achieving high yield and quality. The specific management measures are as follows:...
How to manage chestnut trees during the fruit expansion period? Please give an introduction
Summer and autumn are the period when chestnut fruits expand rapidly, so fertilizer and water management and pest and disease control must be strengthened to allow the fruits to expand fully, the flesh to be plump, no fruit drop in the middle period, and good fruit quality, thereby achieving high yield and quality. The specific management measures are as follows:
1. Timely fertilization: In summer and autumn, fertilizer must be applied to the roots once a month, mainly with a complete nitrogen-phosphorus-potassium fertilizer. For each tree bearing more than 50 kg of fruit, apply 0.75-1 kg of urea and 0.5-0.7 kg of monopotassium phosphate each time, or apply 1-1.5 kg of nitrogen-phosphorus-potassium compound fertilizer, broadcast after rain or drenched with 80-100 kg of clean water.
2. Mulching the tree plate: In summer and autumn, the tree plate must be covered with dry rice straw or other weeds, with a grass thickness of 8-10 cm, to reduce water loss, keep the soil moist, prevent high-temperature and drought weather from damaging the underground root system, improve absorption capacity, and ensure normal absorption of sufficient fertilizer and water.
3. Pest and disease control: During the chestnut fruit expansion period, trees are susceptible to anthracnose, powdery mildew, dieback disease, chestnut fruit moth, chestnut gall wasp, chestnut weevil, and other pests and diseases, causing a large number of rotten and dropped fruits. A mixed solution of 1000x Lorsban and 800x thiophanate-methyl, or a mixed solution of 1000x dichlorvos and 600x carbendazim, must be sprayed once a month inside and outside the canopy to effectively control the occurrence and damage of the above pests and diseases and protect the fruits.
4. Foliar topdressing: During the chestnut fruit expansion period, a foliar spray must be applied once every 10-15 days of a mixed solution of 0.1% magnesium sulfate, 0.2% urea, 0.3% monopotassium phosphate, 1000x triacontanol, and 1500x Shennongsu chelated fertilizer, or an 800x fruit tree-specific Gaomeishi organic humic acid active liquid fertilizer aqueous solution, to improve the nutritional level of the tree, promote rapid fruit expansion, make the flesh plump, and avoid empty burrs.
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