What is the reason why the planted pomegranate trees fall from flowers and fruits? How to improve the fruit setting rate and prevent rotten fruit? What kind of medicine should I take?

Pomegranate tree generally refers to pomegranate, also known as pomegranate, Shanli leaf, Dan Ruo, Ruo pomegranate wood, Jinlu, Jinpang, Tulin, Tianjia, which are cultivated in the north and south of China. So what is the reason why pomegranate trees fall from flowers and fruits? How to improve the fruit setting rate and prevent rotten fruit? What kind of medicine should I take?

What is the reason why pomegranate trees fall from flowers and fruits?

1. Due to sufficient fertilizer and water, the tree does not accumulate enough nutrients, the proportion of fruiting flowers is not high, and there are many empty flowers, resulting in falling flowers.

2. the cultivation management is extensive, the fertilizer and water can not keep up, the tree is weak, and there is no timely supplement of nutrients before and after flowering, resulting in falling flowers and fruits.

3. The overcast and rainy weather during the flowering period affects the insect activity, and the pomegranate has poor pollination and fertilization, resulting in falling flowers and fruits.

4. During the formation of young fruit, the low temperature caused the fruit drop.

How to improve the fruit setting rate of pomegranate trees? What kind of medicine should I take?

The main results are as follows: 1. To control the growth of the tree and adjust the contradiction between branch growth and fruit: for the tree with vigorous growth, the methods such as cutting off the root, picking the heart, twisting the branch, taking the branch and pulling the branch can be adopted to promote the flower bud differentiation and make it blossom and bear fruit.

2. Strengthen fertilizer and water management: apply fruit-picking fertilizer in autumn, increase organic fertilizer, strengthen tree potential, strengthen fertilizer and water management in bud stage, improve tree nutritional status and increase the proportion of normal flowers. Little or no nitrogen fertilizer is applied to young and prosperous trees.

3. Artificial removal of empty flowers: when the bud just appears, it can distinguish whether it is a normal flower (the bud is in the shape of a gourd), commonly known as "elder brother flower", remove the degraded flower, commonly known as "girl flower", pay special attention to removing the degenerated buds and flowers below the normal flower at the end of the fruiting branch, and retract to the healthy part of the flower branch that are all degenerated flowers, so as to preserve the nutrition of the tree and improve the fruit setting rate.

4. Spraying trace elements: spraying boron fertilizer (0.2%-0.3% borax) or amino acid foliar fertilizer 500-600 times at flowering stage can effectively reduce flower and fruit drop. Spraying 0.2%-0.3% potassium dihydrogen phosphate and other foliar fertilizer during the young fruit stage can enhance the anti-freezing ability of young fruit and play an important role in reducing fruit drop caused by late spring cold.

5. Cut off the useless new branches in the crown: cut off the useless new branches in the crown in time after sprouting in spring, so as to reduce the consumption of nutrients and reduce the drop of flowers and fruits. Cut off useless new branches and cut them as you send them.

6. To control aphids, only 40% dimethoate EC 2000 times, or 30% Taoxiaoling EC 2000 times, or 20% methamphetamine EC 3000 times, or 20% fenvalerate 2000 times, or 20% Chrysanthemum Horse EC 3000 times, the effect is very good.

How to prevent pomegranate rotten fruit?

1. Clear the garden in winter. After winter pruning, remove disease and insect branches and leaves, rotten fruit and stiff fruit in time, scrape off the old warped skin and disease and insect spots on the tree and bury or burn them deeply, so as to reduce the source of diseases and insect pests. Baomei 3Mel 5 degree stone sulfur mixture was sprayed in the whole garden from defoliation to pre-budding, and the trunk was whitened. The whitening agent can be prepared with 10 parts of quicklime, 1 part of salt, 2 parts of raw solution of stone-sulfur mixture, 40 parts of water and 2 parts of clay.

2. Fruit management. After thinning and setting the fruit, plug the calyx tube of the fruit with 50% phoxim 100 times liquid and 70% methyl topiramate 800 times liquid cotton. After spraying once sterilization and insecticide in the whole garden, fruit bagging can effectively prevent diseases and insect pests and mechanical damage, and reduce fruit cracking.

3. Chemical control. During the growth period of pomegranate, 40% carbendazim or 1000 times of methyl topiramate or MMel 45 Dasheng wettable powder were sprayed to control dry rot and brown spot, etc. in the first and middle of May, phoxim poisonous soil or 50% phoxim was sprayed on the ground, and the garden soil was turned over shallowly to control the overwintering larvae of peach borer and peach heart borer. Then, according to the insect situation, 50% phoxim 1500Mel 2000 times or 2.5% enemy killed 3000Mel 5000 times were sprayed every 15 days in mid-late May to control.

Time: 2019-03-18 Click: