What Causes Deformed Kiwifruit? Detailed Explanation 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? And how should it be prevented and controlled? Follow the editor to take a look.

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 result 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 penetration, the fruit tree's flower bud differentiation will be poor. During pruning, improper pruning that fails to properly handle the relationship between vegetative growth and reproductive growth can also affect the later growth and development of the fruit, causing deformed fruit.

II. Prevention and Control Measures

1. Pay attention to thinning flowers and buds

Because kiwifruit generally does not show physiological fruit drop as long as pollination is sufficient, flower buds can be thinned. During the bud emergence stage of the plant, the side buds of double buds and 3-bud clusters, the buds at the base of fruiting branches, and diseased and pest-damaged buds can be thinned out, 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 thin out small fruits, deformed fruits, diseased and pest-damaged fruits, and injured fruits to ensure normal fruit growth later.

2. Nutrient selection during flower bud differentiation

Kiwifruit flower bud differentiation has two periods: first, flower bud differentiation from June to August each year, which is physiological differentiation; second, differentiation after germination the following 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 expansion

Many farmers often use hormones to forcibly enlarge cells and promote fruit expansion. To make the fruit larger, they generally soak the fruit early. At this time, if cell division is still inadequate, deformed fruit will result. Therefore, when soaking fruit, attention should be paid to concentration and timing, and nutrient supplementation should also be noted.

4. Pay attention to nutrient supplementation during young fruit development

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

  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 stay tuned to us.