What causes deformed kiwifruit? A full analysis of prevention and control measures

Kiwifruit is a relatively popular fruit, but in recent years, a large number of deformed fruits have appeared in kiwifruit production, seriously affecting the marketable rate and reducing farmers' economic returns. So what causes deformed kiwifruit? How should it be prevented and controlled? Let's take a look together.

I. Causes of deformed kiwifruit

The main cause of deformed fruit in kiwifruit is incomplete pollination and fertilization, poor flower bud differentiation, and reduced flower quality, which results in deformed fruit. There are also many direct causes of poor pollination and fertilization in kiwifruit. For example, if the orchard is poorly established, relatively shaded, and has poor ventilation and light transmission, the fruit tree's flower bud differentiation will be poor. During pruning, improper pruning can fail to properly handle the relationship between vegetative growth and reproductive growth, which can also affect the later growth and development of the fruit and cause deformed fruit.

II. Prevention and control measures

1. Pay attention to flower and bud thinning

Because kiwifruit generally does not experience physiological fruit drop as long as pollination is sufficient, flower buds can be thinned. During the bud emergence stage of the plant, the lateral buds of double buds and triple flower buds, the buds at the base of fruiting branches, and diseased and insect-damaged buds can be removed, which can control the fruit load very well. Fruit thinning can be carried out within 40 days after the flowers fade, and the earlier the better. Mainly remove small fruits, deformed fruits, diseased and insect-damaged fruits, and damaged fruits to ensure normal later fruit growth.

2. Nutrient selection during flower bud differentiation

Kiwifruit flower bud differentiation has two periods. One is the flower bud differentiation from June to August each year, which is physiological differentiation, and the other is differentiation after sprouting the next year and before flowering. To achieve large flowers, uniform flowers, and reduced deformed flowers, attention should be paid to the supply of nutrients such as boron, zinc, and phosphorus. Phosphorus deficiency leads to fewer flowers; zinc deficiency leads to weak and uneven flowers; boron deficiency leads to deformed flowers.

3. Be cautious with hormones for fruit enlargement

Many farmers often use hormones to forcibly enlarge cells and promote fruit expansion, and in order to make the fruit larger, they generally soak the fruit early. At this time, cell division is still insufficient, which will cause deformed fruit. Therefore, when soaking fruit, pay attention to the concentration and timing, and also pay attention to supplementing nutrients.

4. Pay attention to supplementing nutrients during the young fruit development stage

After the flowers fade, it is a period of rapid cell division. At this time, fruit retention energy requires a large amount of phosphorus. If the root system is not well developed and the soil is acidic or alkaline, phosphorus absorption will be poor. At this time, young fruit development will be hindered, fruit drop will increase, and the fruit is also very prone to deform.

  The above is an introduction to the causes of deformed kiwifruit and prevention and control measures. We hope it can help you. If you want to learn more related knowledge, please follow us.