To prevent the falling of the persimmon tree
Peeling out the trunk or main branch of a robust tree not only promotes flower bud differentiation and early results, but also reduces physiological fruiting and early fruit ripening. The girdling is generally carried out in the early flowering period. The flowering period is completed. The stripping width is 0.3-0.5 mm. After stripping, stripping is performed with a plastic strip to maintain the humidity of the stripping mouth and promote healing.
During the growth period, the shears have sparsed the dense branches and ineffective branches, leaving more branches on the windward side and less branches on the leeward side to promote ventilation. After the persimmon is trimmed, the buds will germinate in large amounts. In order to reduce its nutritional consumption, useless sprouts should be erased before lignification. For long branches with growth space, especially for leggy branches, they must be picked up at 40 cm.
When sparse results result in 2-4 fruiting branches on the mother twigs, 3 buds in the middle of the mother twigs should be retained in the first 2 results, and the buds on the other result branches should be removed. If the result is that the mother branch produces more than 5 result branches, the result of the first 3 result branches shall be retained. Each result will have 3 flowers in the middle of the mother branch, and the others will be removed.
Chasing the top dry shoots in May and the fruit enlargement in July will obviously promote the fruit setting rate, and also increase the number of flower buds and increase the quality of flower buds in the following year.
Spraying 500 ppm of gibberellin and 1% urea once at the flowering stage and young fruit stage can improve the nutritional status of flowers and fruits, prevent the separation of the persimmon pedicel and stalk, and enhance the absorption of nutrients by flowers and young fruit. Stimulate ovary enlargement and increase fruit setting rate. In the period of rapid fruit enlargement, the application of 0.3%-0.5% urea solution and trace element fertilizer such as ammonium acid to the leaves can reduce the number of falling flowers and fruits.
During the growing season, artificially remove diseased fruit and fruit; Spray 50% dichlorvos 1000 times solution in early June to eliminate the insects; In mid-June, spray 1:5:400 times Bordeaux mixture, or 65% Sen Zinc wettable powder 500-600 times, or spray a 2.5% green kungfu 1500 times liquid + 1.5% bacteria off 800 times, can prevent persimmon anthracnose, angular spot, round spot disease. During the peak of larvae in late May, late July and early August, spray 20% of swampoli EC 2500 times, spraying mainly on the fruits, stalks and fruit buds of persimmon trees, spraying every 10-15 days. Apply 1 time, spray 2-3 times.
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