Apple planting and pest control

First, thin fruit, set fruit (a) time. 10 to 15 days after the flower falls from the apple, the first physiological fruit drop begins and ends within 10 days. (b) Method. According to the strength of the tree and the number of fruit sets, the appropriate distance between fruits can be determined, usually 20 to 25 cm. Choose a strong inflorescence of sitting fruit, leaving only one fruit per inflorescence and sparing out excess young fruit. When setting the fruit, you should choose to keep the fruit-shaped center fruit, and leave the fruit growing in the middle, long fruit branches and fruit tops, and leave the fruit growing sideways. Generally, the fruit that grows upward is not left.

Second, topdressing, watering After 14 days of falling flowers, the application of urea, 10 kg of urea per mu of fruit, 20 kg of urea in the fruit of the tree. Watering after topdressing, and loosening the soil.

Third, pruning (a) topping. In the middle and late May, the young shoots on the main branch of the young tree and the prongs on the back of the branches grow to 20 cm long and are topped. When there are too many erecting ridges, they should be removed first, and then controlled by measures such as re-picking. (2) Thinning. The young shoots on the back of the young trees are stripped 2/3, the tops are 1/3, and the new shoots are about 20 cm long. For the new shoots from the front end of the auxiliary branch, the long shoots on both sides should be removed, and the middle tip should be left to extend uniaxially to promote the development of the rear short branches. The result tree mainly removes the prosperous new shoots from the cut, and removes excessive branches around the crown and the top to improve the lighting conditions. (3) Ring stripping. Ring stripping of saplings. When the weather is dry, the ring stripping should be wrapped in newspapers in time, and the newspapers will be removed after 7 days. (4) Remove the sprouts.

Fourth, pest control (a) defoliation, lobular disease. In the middle and late May, 800 times of liquid M-45, Bao Li'an, Bacterium 2, 25% of Diflubenzuron No. 3, Avermectin, etc. can be used for prevention and treatment. (2) Round sickness. From the seventh day of flowering, spray and control once every 10 to 15 days until the fruit is harvested. The drug can be selected from 800 times of liquid M-45, methyl thiophanate, 85% of epidemic double spirit, fruit disease once, and Bordeaux mixture. (3) Red spider. When there are 2 to 3 red spiders on each leaf, spray them in time. The medicine can be selected with 15% broom, 15% sputum, 10% sputum, sputum, triazosin, avermectin and the like.

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