Autumn is an important period for citrus fruit extraction, and management must be strengthened to achieve high yields.
Reapply autumn fertilizer, strong fruit tips. At the beginning of October, a strong fruit-promoting fertilizer was applied. In the vicinity of the canopy drip, dig 1-1.2 meters long, 0.3 meters deep and 0.3 meters wide, and fertilize the ring-shaped grooves. Each adult tree will produce 100-200 kg of compost and 100-200 kg of superphosphate and 1.5-2 kg of superphosphate. Urea 1-1.2 kilograms or ammonium bicarbonate 2 kilograms, the juvenile result tree is halved and the young tree is halved again.
Sparse shoots shoots, ring cut flowers. In the present, for the trees with less fruit and less growth this year, use sharp budding knives to cut 1-3 full-circles in 2-3 branches, reaching deep into the xylem and promoting flower buds to divide flowers. After circumcision, 0.2% potassium dihydrogen phosphate and 0.3% urea are sprayed once every 20 days, followed by a 30-40 ppm 2.4-d solution (30-40 ml of 2.4-d water solution with a concentration of 5%). 3-4 times in a row, it can prevent winter and spring defoliation.
Long high pick, replace good breed. At the appropriate time, the long-term, low-yielding trees growing under the age of 30 years and with normal growth will be planted in high-yielding varieties. Using the method of "single (double) buds belly joint", the buds were evenly grafted on the upright and oblique branches with an upper diameter of about 2 cm in the upper part of the canopy, and then piled up in April of the following year.
Forecast and prevent pests. In October-October, high temperature and humidity are the peak period for the occurrence of citrus diseases and insect pests. It focuses on the prevention and treatment of anthrax, rust wall wind, red spiders, and arrowheads. During the autumn shoots, the 800-fold dose of dassonam liquid 1 -2 times to control citrus anthracnose; in the dry season, when found in young citrus fruit "black charcoal pill" immediately with 0.3-0.4 Baumide's lime sulfur control 1-2 times; for citrus red spider, observe the year New treetop leaves, each with about 5 worms, sprayed with 15% chlorbenzamide 3,000 times liquid; in the full hair period, when the larvae reach 50%, spray 40% speed Emulsion 1200 times 1-2 times.
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