Essentials of Apple Thinning Flowers and Fruits

1. Strict standards for flower thinning, fruit thinning and fruit fixing

When thinning flowers, the inflorescence separation stage thins out dense and poor-quality inflorescences; thins out the inflorescences except for the extra-long fruit branches and permanent main branch extensions of 50 cm; thoroughly removes the axillary flower buds and retains the leaves on the fruit moss; In the full blooming period, the center flower and side flower are selected, and the remaining flowers are thinned out.

When thinning the fruit, give priority to retaining the central fruit. In the case of insufficient central fruit, you can choose a larger side fruit with thicker remaining fruit and flat shoulders. Resolutely put an end to double fruit and three fruit. When thinning the fruit, try to remove the fruit as much as possible to reduce the damage caused by the cause and effect when harvesting. The side fruit, deformed fruit, diseased fruit and damaged fruit should be completely eliminated.

Two, scientifically determine the amount of fruit retained

According to the variety, fruit setting, tree vigor, site conditions, fertilizer and water conditions, determine the amount of fruit retained per mu. On this basis, clarify the amount of retained fruit per plant and each main branch. One is to determine according to the size of the fruit. Large-fruited varieties (such as Fuji, Qinguan, etc.) leave one fruit at 20-25 cm; medium and small-fruited varieties (such as Gala, Qianqiu, etc.) leave one fruit at 15-20 cm, and the amount of fruit can be slightly more than 10%. ~20%. The second is to determine according to the tree situation. If the tree is strong, stay more, and if the tree is weak, stay less.

Three, matters needing attention

1. For orchards with particularly large flowers, the amount of remaining flowers and fruits must be strictly controlled to achieve a reasonable load.

2. The tools must be carefully disinfected before fruit thinning to avoid spreading germs.

3. To strengthen the management of the flowering period, combined with the prevention and control of pests, appropriate amount of urea, potassium dihydrogen phosphate, humic acid, active calcium and other foliar fertilizers can be added when spraying to supplement nutrition and improve fruit setting rate and fruit setting quality .

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