What about low-calorie food, apples, flowers and fruits? What kind of medicine should I take? How to improve the fruit setting rate?

In the growth process of fruit trees, the phenomenon of falling flowers and fruits occurs from time to time, which reduces the production of fruit trees and greatly reduces the income of fruit farmers. What about the apple falling flower and fruit? What kind of medicine should I take? How to improve the fruit setting rate?

What should I do when apples fall from flowers and fruits?

First, vigorously popularize the application of base fertilizer in orchards in autumn and improve the storage nutrition of trees.

In recent years, some fruit growers do not pay attention to the application of base fertilizer in autumn, and the orchards are neglected before and after fruit harvest, resulting in a serious lack of tree storage nutrition. The root system of fruit trees has a growth peak in autumn, and supplementary nutrition must be given before and after fruit harvest. The application of base fertilizer in autumn is mainly organic fertilizer, and a small amount of chemical fertilizer is applied according to the weight of fruit. The best time to apply base fertilizer is from late September to early October. Because the storage nutrition of fruit trees mainly comes from the products of leaf photosynthesis before and after fruit picking, in order to improve the storage nutrition of fruit trees, it is necessary to popularize the application of base fertilizer in orchards in autumn.

Second, improve pollination conditions

1. Configuration of pollination trees or pollination branches in order to solve the problem of purification of current varieties, pollination trees should be allocated at the proportion of 10:2 in the newly developed orchards. In orchards that hang fruit or are about to hang fruit, one or two pollination branches per tree should be used to solve the problem of poor pollination. Xinhongxing and Wang Lin are the best pollination varieties in Fuji series.

2. Popularize the pollination of squash bees. The pollination effect of wall wasp is very good, and Zhaoyang District also popularized it in 2005 and 2006, but later, due to the problems of bee management and preservation, the promotion of this technology was not successful in Zhaoyang District. In order to avoid falling flowers and fruits in a large area, we should re-increase the introduction and promotion of this technology, and continue to summarize and improve it in the promotion.

3. Put bees in the orchard. There are few fruit farmers keeping bees in Zhaoyang District. If apple flowering can organize non-local beekeepers to put bees in our village orchards, it is not only beneficial to fruit farmers, but also beneficial to beekeepers and get more with one stone. At the same time, it can also drive some fruit farmers in our region to keep bees and gradually achieve the goal of self-sufficiency in orchard pollination.

4. Popularize artificial pollination. Collect unopened "bell flowers" before flowering, heat them in greenhouse or incubator to 20-25 ℃ to dry and take powder, put them in a bottle and store them in a low-temperature dry place. When waiting for flowering, use brush and other tools for point pollination, each dipped in pollen can be 5-10 flowers, the effect of this method is very good.

What kind of medicine does apple drop flower and fruit to play?

1. Spraying fertilizer at flowering stage. When 30% of the central flower blossoms, 0.2% Mel 0.3% urea solution is sprayed; 0.1% Mel 0.2% borax solution is sprayed at the flower bud or flowering stage, the two can be mixed and sprayed, which can effectively increase the fruit setting rate; or 1:2 biogas liquid can be used to protect flowers and fruits.

2. Spray sugar at flowering stage. Spraying brown sugar water or white sugar water with a concentration of 2% Mui 3% at flowering stage to induce insect pollination can improve fruit setting.

How to improve the fruit setting rate of Apple?

1. Strengthen field management, strengthen field management to improve tree nutrition level the main storage nutrients needed for deciduous trees at flowering stage should first pay attention to harvesting and topdressing, irrigation, pest control and other measures to improve photosynthetic efficiency, accumulation, storage and quality of flower buds, and to strengthen spring management and early topdressing, irrigation and tillage to ensure flower sitting and cultivation.

2. To create good pollination conditions, cross-pollination varieties should be rationally arranged on the basis of pollination trees and take a series of auxiliary measures.

(1) the number of bees released in the flowering period; the number of bees in the tree insect-borne flowering period increases the sitting rate in the orchard; bees should be placed in the apple garden 0.33-0.67hm2 before flowering. Due to the beehive flying habit, the beehives should be placed at a distance of 100-150m between the beehives in each row or every few rows.

(2) High-grafted flower-branch pollination varieties lack of high-grafting pollination varieties with flower bud branches to increase pollination rate. According to the principle of allocation of pollination trees, the whole tree height of single variety garden plant is changed to pollination varieties.

(3) the pollination varieties of flower branches pollinated by hanging cans are lack of cut pollination varieties at the early stage of garden flowers, flower branches, water pots or wide-mouth bottles are needed to improve the pollination efficiency of pollination trees.

3. Work-assisted pollination Pollination should be carried out when pollination is carried out according to the lack of pollination varieties or good climate conditions at flowering stage. pollination must be carried out according to the study that each flower is often conducive to fertilization and sitting must be predicted in advance according to the changes of temperature and humidity in spring during the phenological period. according to the pollen germination rate, pollen dilution 5-10 times (adding talc or starch), column pollination, liquid pollination. Add 5% sugar solution and add 0.3% urea, 0.1% boric acid 5kg sugar solution plus pollen 10-12g pollination solution should be used along with the use.

4. with the application of regulators, the basal detachment of the original pedicel and the endogenous hormones (gibberellin, vegetarian, etc.) were used to increase the content of some substances in the flowering period or flower spraying process to prevent the stalk production and delamination from increasing the setting rate.

5. Summer pruning, pest control and other measures to improve the sitting rate.