Why do fruit farmers who grow apples leave some apples on the trees?

There are many reasons for apple fruit falling, which can be divided into internal and external causes. The internal causes mainly include some factors inside the apple tree, while the external causes mainly refer to environmental conditions. The specific contents are detailed below. Variety

Apple is a kind of alien pollination plant. Some old varieties planted all the year round will be gradually eliminated, and new improved varieties will be planted. If fruit farmers plant the eliminated varieties, even if they manage them well in the later stage, it may lead to poor pollination and fruit drop.

solution: for fruit farmers who want to grow apples, if they don't know which varieties to grow, they can ask local fruit farmers with planting experience and ask them for advice, or when buying fruit seedlings, they can find acquaintances to introduce them. Don't plant obsolete varieties, although they are cheap, they can't grow them. Storage capacity of trees

When apples are planted at flowering stage, they need a lot of nutrition to supply. At that time, most of the nutrition comes from the apple tree itself. Therefore, the storage capacity of trees is very important. For fruit trees with strong storage capacity, the phenomenon of fruit dropping is not obvious. On the contrary, if the storage capacity is weak and the nutrition supply is insufficient, the phenomenon of fruit dropping will be aggravated.

solution: strengthen fertilization in autumn, so as to improve the nutrition of tree storage. The time is about from late September to early October, and organic fertilizer can be used together with compound fertilizer. Drought and waterlogging prevention

When the apple is in the young fruit stage, it is sensitive to water. If there is no rain for a long time, the young fruit will fall because it can't absorb enough water. On the contrary, if it is rainy, water will accumulate in the orchard, which will hinder the growth of roots, affect the transmission ability and lead to fruit drop.

solution: do a good job in water management in the orchard. In case of drought, irrigation and watering should be done in time, especially in the young fruit period. If there is water accumulation in the field, drainage should be done in time. Here, it should be noted that the ditch may be blocked by leaves, so do a good job in cleaning the channel. Sparse flowers and fruits

In the orchard, if the apple trees bloom more, it is not a good thing. On the one hand, it will form a competitive relationship with each other and increase the consumption of nutrients and water, which is not conducive to the growth of all fruits. On the other hand, it will also affect pollination, reduce the fruit setting rate and increase the probability of fruit dropping.

solution: do a good job of thinning flowers and fruits in the orchard, so as to reduce excessive consumption of nutrients and help reduce fruit drop. In addition, artificial pollination can be used to improve the fruit setting rate. Pests and diseases

Some pests and diseases on apple trees are also common causes of fruit drop, especially the effects of diseases, such as anthracnose, rot, ring rot, etc. Most apples that fall due to diseases will be accompanied by rot, so check the fallen fruits to determine whether they are caused by diseases.

solution: for the fruit drop caused by pests and diseases, fruit farmers should spray chemicals in time to prevent and control, such as controlling apple anthracnose. The available chemicals include mancozeb, prochloraz, thiophanate-methyl, etc., or the compound chemicals such as azoxystrobin, prochloraz, dicyandiamide, pyrazolyl ester and penconazole, prochloraz, etc.