Management measures of apple after late spring cold

In recent years, the cold weather in late spring has become more and more frequent, resulting in varying degrees of yield reduction or no harvest in many apple orchards. If the apple orchards are harmed by the late spring cold, then the apple trees will be malnourished and a large area of fallen leaves will appear. Flower bud differentiation will be affected, and the next year will be a small year. So what should Apple do after it suffers from the late spring cold? Come and have a look with the editor.

1. Pause thinning of flowers and fruits

Orchards suffering from late spring cold should temporarily stop the work of flower and fruit thinning, and after fruit setting is stable, they should be planted flexibly according to the fruit setting rate, the severity of freezing injury, the advantages and disadvantages of young fruits and the strength of trees. After the late spring cold, the orchard should make full use of the late blooming fringe fruit and the central fruit of axillary flower bud to ensure yield and increase income. In addition, it should be noted that the young fruits with mild frost damage of premature senescence will have frost ring symptoms after growing up, which will affect the commercial value of the fruit, which can be thinned out as appropriate.

2. Spraying plant regulators

Affected by the early high temperature weather and the late frost injury in the full flowering period, the quality of setting fruit in time is far lower than that in previous years, mainly because there are few seeds formed by pollination and fertilization of high temperature apples, and some seeds are frostbitten by late frost. in the later stage, physiological fruit drop may be caused by a small number of seeds and poor quality. It can spray gibberellin in time, effectively improve the fruit setting rate, promote the expansion of young fruit, and improve the commercial value of fruit.

3. Topdressing to enhance the tree potential

In view of the orchards with different degrees of freezing damage, the frozen young fruits and tender leaves are in the stage of restoring growth and need to consume a lot of reasons, so we should apply high nitrogen or balanced trace water soluble fertilizer in time according to the tree potential to promote the growth of roots, branches and leaves and the expansion of young fruits, which is of great help to restore tree potential and increase yield.

4. Timely summer shearing

Because of the decrease in load, the branches of many fruit trees begin to grow a little, but in order to avoid excessive consumption of nutrition, they should pick the heart, twist and pull branches in time, and timely and appropriately cut or peel the overgrown fruit trees, which is beneficial to the differentiation of apple flower buds. However, coring, twisting and pulling branches are time-consuming and laborious, and ring-cutting is very easy to hurt trees, so it is recommended to combine plant growth retarders on the basis of summer pruning to control growth and promote flowers, so as to reduce the workload and cost of summer pruning.

The above is the introduction of the management measures of Apple after the late spring cold. I hope it can help you. If you want to know more about it, please follow us.