Citrus young fruit slow to turn green: causes and remedies

After citrus blossoms fade, if the phenomenon of young fruit turning green slowly appears, you must pay attention to it. This is a dangerous sign, indicating that the plant's nutrition cannot keep up, and a large amount of fruit drop will occur during the second physiological fruit drop. So what causes young fruit to turn green slowly? What should be done? Let's take a look at the detailed introduction below.

I. Causes of slow greening

1. Rainy, overcast weather with little sunlight

During long periods of low temperature and frequent rain, the photosynthesis of the plant's leaves weakens, the nutrients formed are insufficient, and the tree gradually becomes weak. After fruit set, the plant needs a large amount of nutrients, so a situation arises in which nutrient supply falls short of demand, and the young fruit turns yellow. With excessive moisture, the root system's absorption capacity weakens, and combined with less nutrient synthesized by photosynthesis, root growth is hindered, which leads to young fruit turning green slowly or having difficulty turning green.

2. Hindered growth of new shoots

When the leaves of new shoots cannot turn green normally, or when spring shoots are attacked by pests and diseases, the nutrients synthesized by their photosynthesis are reduced, which cannot satisfy the growth and greening of the fruit and will also cause a large number of young fruit to drop.

3. Hormone imbalance

During the growth of young fruit, if the plant's auxin and gibberellin are sown, the fruit stalk will produce abscisic acid, causing fruit drop, while the spring shoots do not turn green, photosynthesis efficiency is low, and fruit drop is caused.

II. Solutions

Fruit thinning, pruning, drainage and irrigation, and pest and disease control should be carried out reasonably, with particular attention to the soil-borne diseases that cause fruit drop, which are extremely likely to occur during rainy periods. Fertilize reasonably according to each growth stage of citrus, supplement what is needed for that stage, and when there is less light, promptly supplement organic fertilizer and growth regulators to promote photosynthesis and make its nutrition balanced, so as to avoid the phenomenon of slow greening. During the period of controlling shoots and promoting flowering in the plant, for weak trees, girdling should not be done too early or too heavily, and hormones should be used as much as possible; for trees with insufficient nutrition, foliar fertilizer spraying can be increased to promote their growth.

The above is an introduction to what to do when citrus young fruit turns green slowly. I hope it can help you. To learn more related knowledge, please follow us.