What to Do About Persimmon Flower and Fruit Drop? Causes and Prevention Methods
When growing persimmons, because they are extremely demanding about their growing environment, improper management can easily lead to flower and fruit drop, which seriously affects persimmon yields. So what should be done about persimmon flower and fruit drop? Follow along with the editor to see the detailed introduction.
1. Reasonable fertilization
When topdressing persimmons, it should not be done too early. Generally, topdressing is done in May during the branch tip dieback period and in July during the fruit enlargement period. Topdressing during these two periods can improve the fruit set rate of persimmon trees and has an obvious effect on increasing yield. In addition, it can also promote the number of flower bud differentiations for the following year and, through flower bud quality, effectively prevent flower and fruit drop.
2. Girdling during the flowering period
Girdling during the flowering period can both improve the fruit set rate and effectively prevent flower and fruit drop. The specific method is: at the early flowering stage of the persimmon plant, use a knife to cut two rings on the trunk 30-50 cm above the ground, about 0.5 cm apart vertically, with the depth reaching the xylem, and peel off the bark between the rings. This completes the girdling. To prevent pathogens from invading through the wound and harming the plant, after girdling, take good care of the wound and bind the wound with plastic sheeting. In addition, note that weak trees and weak branches are not suitable for girdling.
3. Flower and fruit thinning
One of the causes of flower and fruit drop is that the number of flowers and fruits is too large, and the nutrients required for their growth exceed the plant's supply, so they drop due to insufficient nutrients, affecting the quality of the other fruits. Therefore, timely bud removal, pinching, and flower and fruit thinning should be carried out. Specifically: promptly remove overly dense sprouting branches and buds, promptly pinch off excessive vegetative branches that have grown to more than 20 cm, and promptly thin out some flowers and fruits on plants or branches with too many flowers and fruits. This can reduce the plant's burden, concentrate more nutrients in some of the fruits, and promote their growth.
4. Strengthen pest and disease control
A large part of the reason for flower and fruit drop is caused by pest and disease damage. For example, persimmon circular leaf spot, persimmon fruit borer, and persimmon mealybug can cause flower and fruit drop. Their control should be strengthened. Spray Baume degree lime sulfur mixture once in May each year and Bordeaux mixture once in June, which has a good control effect on them.
5. Spraying medication
Spraying a low-concentration mixed aqueous solution of boric acid and ammonium molybdate once during full bloom has an obvious effect on improving the fruit set rate and reducing the probability of flower drop. During the young fruit stage, spraying gibberellin solution has an obvious effect on reducing fruit drop.
The above is an introduction to what to do about persimmon flower and fruit drop. I hope it can help you. If you want to learn more related knowledge, please keep following us.