Autumn tube should be strengthened for high yield of growing citrus.

Autumn is an important period for strong citrus fruit shoots. Strengthening the management of citrus orchards can achieve high and stable yield year after year. The techniques are as follows:

Irrigation and heat preservation, drought resistance and heat preservation. In the early days, the orchards should be irrigated sooner or later, and each fruiting tree should not be less than l00kg~150kg each time. The use of weeds, artemisia stalks, vines and other ground cover can also protect moisture, drought and fruit.

Thinning buds and raising shoots, ring cutting to promote flowers. In the middle of September, the trees with few fruit and prosperous growth this year were cut three whole circles on the branches of grade 2 and 3 with a sharp bud grafting knife, reaching to the xylem to promote flower bud differentiation. After ring cutting, 0.2% potassium dihydrogen phosphate and 0.3% urea were sprayed every 20 days or so, plus 2.4ml D solution of 30PPM~40PPM for 3-4 times in a row to prevent defoliation in winter and spring.

Multi-head high connection, change the improved seed. In early autumn, low-quality and low-yield trees with normal growth and less than 30 years old were replaced with high-end grafting to develop new varieties such as high-quality navel orange, extra-precocious Wenzhou mandarin and Qingjian. By using the method of "single (double) bud ventral grafting", the buds were uniformly grafted on the erect branches and oblique branches with a diameter of about 2cm in the middle and upper part of the crown. After he survived, he was put down the stake in April of the following year.

Forecast, prevention and control of diseases and pests. It is hot and humid from August to October, which is the peak period of citrus diseases and insect pests. emphasis should be placed on the control of anthracnose, leaf miner, rust tick lice, red spider and sagittal scale, etc. in the autumn shoot emergence period, when the new buds show large grains of rice, spray 0.5% enemy kill 2000 times liquid, add 20% Dysenamine 1000 times mixture to control citrus leaf moth and anthracnose, spray once every 10 days, 4-5 times in a row. In the summer drought period, when sporadic citrus young fruits were found to have "black charcoal", the stone-sulfur mixture of Baume 0.2mur0.3 degree was immediately used to control it once or twice; in September, it was ten days, when the young scale was in full bloom, and when the young scale hatched to about 50%, the crown was sprayed with 20% fast gram emulsion or 40% speed EC 1500 times to control it once or twice.