How to prevent persimmon fruit falling?

How to prevent persimmon fruit falling?

The call of Liu Guoqing, a reader of Guocun Town, Shanyou County, reported that last year, the persimmon tree had a serious fruit drop. At present, it is still in the period of persimmon tree flowering. I do not know how to prevent persimmon trees from falling. The reporter consulted relevant fruit tree technicians. According to reports, the persimmon tree is a common problem in the production of persimmon trees in recent years. When it is serious, it can cause an unrequited harvest. The fruit grower should strengthen prevention and treatment:

During the flowering period, girdling takes place during the early flowering period and the flowering period is completed. The girdling applies to strong trees, strong branches or large fruiting groups. The width of the ring stripping mouth is 0.3-0.5 mm. After peeling, it is stripped with a plastic cloth strip to keep the mouth moisture and promote healing.

Reasonable summer shear in the growth period to sparse over dense branches, invalid branches, leaving more wind on the wind surface, leaving leeward surface branches, promote air and light. After the pruning of common persimmon trees, the buds will germinate in large quantities. In order to reduce nutrient consumption, useless sprouts should be removed before lignification. Long branches with growth space, especially leggy branches, should be picked up at 40 cm.

Sparse flower buds When the results of the results of the branch on the 2 to 4 branches, retain the first two results of the mother bud in the middle of the three buds, other results of the buds on the branches were all sparse, leaving for the preparation of branches. If the result is more than 5 result branches from the mother branch, the first 3 result branches should be retained. Each result will have 3 flowers in the middle and the rest will be removed.

When the Qiaofei Water enters the tree where the result is at its peak, it is necessary to strengthen the management of fertilizer and water, apply the base fertilizer early in the spring, and apply the base fertilizer in autumn, but the topdressing cannot be premature. In general, during the top dead shoots in May and the fruit enlargement in July, the two fertilizers have a significant effect on improving the fruit setting rate, and can also increase the number of flower buds and increase the quality of flower buds in the following year. Watering.

Chemical regulation Spraying 500ppm of gibberellin plus 1% urea at full flowering stage and young fruit stage can improve the nutritional status of flowers and fruits, prevent stratification of shikidi and stalk, and enhance absorption of nutrients by flowers and young fruit. , stimulate ovary enlargement, increase the fruit setting rate; fruit rapid expansion period, spraying 0.3% ~ 0.5% foliar urea solution and ammonium and other trace elements fertilizer, can reduce flowering and fruit drop.

In the growing period of pest control, artificially remove diseased fruit and fruit; in early June, spray 50% dichlorvos EC 1000 times to eliminate the insects; in mid-June, spray 1.5 times 400 times Bordeaux mixture, or 65% Sen Zinc wettable powder 500 ~ 600 times liquid, 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 and spraying every 10 to 15 days. Apply 1 time, spray 2 or 3 times.

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