The lower part of the red sun kiwi fruit has shrunk, what is the reason? But the fruit trees are lux

Sprinkle the potion and there's bugs in it.

It should be a symptom of kiwi anthracnose hazards:

1. Initially produce round or irregular brown lesions on the leaves, **gray-white, brown edges, obvious junction between disease and health, and many small black spots scattered on the lesions;

2. The initial water-stained brown spots of the fruit are expanded, and then they expand into dark brown dry rot lesions, and the lesions are slightly concave, and when wet, the diseased part secretes flesh-colored conidia blocks.

The occurrence of anthracnose in kiwifruit.

The germs mainly overwinter on the diseased body, and spread by wind and rain in the spring of the following year, invade from the stomata and wounds, and become seriously ill at room temperature and high humidity. This disease is one of the main diseases in the southern kiwifruit cultivation area with a lot of rain and high humidity.

Methods for the prevention and control of kiwifruit anthracnose.

1. Strengthen the management of soil fertilizer and water in the orchard, reapply organic fertilizer, reasonable load, scientific plastic pruning, create good ventilation and light transmission conditions, maintain strong tree potential, and reduce the occurrence of diseases.

2. Combined with autumn fertilization and winter pruning, clean up fallen leaves and fruits, thin out branches that are infested by diseases and insects, and eliminate the source of overwintering.

3. Before germination, the whole garden sprays 60 times of the decay to eliminate the germs on the surface of the tree.

4. Before flowering, the whole garden is sprayed again, 800 times of potassium dihydrogen phosphate or 800-1000 times of 75% mancozeb, 800 times of the mixture of foliar fertilizer, and the prevention of gray mold, and spray again after 10 days.

5. In the early stage of the disease, you can choose to spray Liangguoan 150 times garlic oil 1000 times + difenoconazole mixture for prevention and control in the whole garden, pay attention to the interval of 2 days, spray 3 times in a row.

Kiwi as a fruit, we usually like to eat fresh, but the kiwifruit purchased in the market rarely meets the requirements of immediate consumption, and most of them need to be stored for a period of time or processed after some ripening measures before they can be eaten. Why is that? In fact, most people can understand the reason why kiwifruit is hard harvested.

Compared to fruits such as apples, pears, peaches, etc., kiwifruit has some unique characteristics. When harvesting, if the harvest is sufficient, it is easy to soften and affect the sales effect; On the other hand, it is easy to rot when sold, which affects the taste of the fruit and dampens consumers' desire to buy. Therefore, most kiwifruit producing areas advocate harvesting kiwifruit when it is not ripe.

After a large number of harvest tests, it was found that when the total sugar content of the fruit reached 7-8%, different varieties of kiwifruit planted in different regions could be determined according to the total sugar content index of the fruit. However, due to factors such as climate, there are often differences in different regions. This time can also be determined according to the appearance of the fruit.

For example, the green flesh of the kiwi fruit has a green background color, fluffy browning, green flesh, and black seeds. Which method is the most suitable for postharvest ripening of kiwifruit? Ethylene ripening kiwifruit principleKiwi ripening, no matter what ripening method is used, ethylene is essential.

The main principles of ethylene ripening kiwifruit are: ethylene treatment increases the respiration intensity of kiwifruit, improves the permeability of protoplasm to oxygen in fruit tissues, and promotes biochemical processes such as fruit respiration with aerobic participation; Ethylene can also enhance the activity of enzymes in fruits and change the direction of enzyme activity, thereby greatly shortening the ripening time of fruits and accelerating fruit ripening.

We often use ethylene to ripen kiwifruit, either by flushing ethylene gas to increase the concentration of ethylene in the environment to achieve the purpose of ripening, or by soaking the fruit with ethephon to improve the ripening effect of kiwifruit. For the above two methods, the ethephon soaking method is widely used because of its simple operation and quick effect. Here's how:

Soak the fruit with 1000mg kg ethephon for 2 minutes at room temperature and treat it for two weeks**. The aerial parts of kiwifruit do not grow gradually, the leaves turn yellow and begin to fall off, and the fruit begins to swell, and it is not easy to be gently squeezed but not completely softened, and it can be harvested. Kiwifruit should not be harvested too early or too late, because if harvested too early, there will be less nutrients in the fruit.

The fruit is harvested too late, the storage and transportation capacity is poor, and the low temperature is susceptible to frost damage, which affects the planting efficiency.

Due to the different ripening times of different planting plots in the same orchard, the bulk harvest is mainly to prevent the unripe kiwifruit from being picked. Kiwi is hard to come by. How should I put kiwi fruit is not good to buy.

You can ripen it with apples. Because apples are naturally ripened fruits, there is a certain amount of ethylene in the body, which can accelerate the ripening of kiwifruit and make it soft. Or ripen kiwifruit with medicine.

An appropriate amount of water can be added directly to the ethylene, then diluted and sprayed on the surface of the kiwifruit. After spraying, store the kiwifruit and it will soften in about 1-2 days. Be careful not to eat unripe kiwi because unripe kiwi cannot be eaten and has a bitter taste.

Eating it destroys the mucous membranes in the human mouth and the proteins in the food.

I think that picking the kiwi when it is hard will not spoil easily, and it can be left for a longer time, so that we can eat fresh kiwi when we buy it.

Because kiwifruit is picked when it is hard, and then transported to various places before it slowly becomes ripe.

Kiwifruit fruit drop may be due to early frost and early snow in autumn, which affects the accumulation and transportation of nutrients, improper pollination time, ineffective pollination due to low temperature, insufficient pollen dosage, and insufficient activity resulting in pollination unable to sit still.

Fruit drop due to abnormal weather usually occurs after flowering, but also in the case of flower drop. Since macaques are most sensitive to weather and climate when pollinating, 15-28 degrees is the most suitable temperature for kiwifruit to pollinate and fertilize, and if it is lower than 15 degrees or higher than 28 degrees, it will affect its pollination. And the suitable humidity is above 55%, but the pollen will break when exposed to water and cannot be pollinated.

Fruit trees are malnourished.

The soil has low organic matter content and shallow root system, which hinders the growth and development of fruit trees. The lack of nutrients in fruit trees leads to a decrease in growth and nutrients, which can also lead to a decrease in fruit set.

Fruit drop after flowering, this stage of fruit dropping, occurs after flowering and is often accompanied by the phenomenon of flower drop. The fertilization stage of kiwifruit is sensitive to meteorological factors, and the temperature of kiwifruit flowering stage is generally 18 25, and the temperature is lower than 15 or higher than 28, which is not conducive to pollination and fertilization. In case of long-term rainy weather, we should consider dehumidification, and we can dig trenches in the orchard to divert water for dehumidification.

In case of cold weather, consider using fireworks to raise the temperature of the orchard. In addition, it is also very important to do a good job in the integration of water and fertilizer in orchards and intelligent detection systems.

There are many factors that cause poor fruit nutrition, for example, if the tree is empty of nutrients in the old year, due to bad weather stress (drought, waterlogging, high temperature, etc.), the amount of fruit hanging is too large, and the nutrients produced by the leaves cannot meet the needs of the fruit, etc., the above reasons can cause fruit drop due to insufficient nutrition. After the fruit is harvested, the fruit tree is not maintained, resulting in insufficient tree nutrition, if the fruit hangs again, and the number of hanging fruit is large, resulting in premature leaf aging, reduced photosynthetic function, poor quality of flower bud differentiation, it will seriously drop the fruit.

<> most of the fruit farmers according to the old experience, there is no irrigation before flowering, and the plan is to wait for the pollination to end the irrigation, the result is that the kiwifruit flowering is not normal, the performance is that the petals can not open large, the petal color is yellow, the female flower stigma is dry, can not secrete mucus, resulting in poor pollination. Pests and diseases lead to fruit drop. If fruit drop is found, find the cause in time, spray the medicine appropriately, reduce the incidence and reduce the occurrence of diseases.

Reasonable fertilization, timely irrigation, and prevention of pests and diseases. The higher the frequency of using pesticides on the foliar surface, the faster the photosynthesis of the leaves declines, and it looks like a leaf, but the organic nutrients produced are less, so protect the leaves, control the vegetative growth, and reproductive growth is natural. The second is that the nutrient accumulation after fruit picking is insufficient, if there are too many fruits, the leaves are prematurely senescent, the photosynthetic function is reduced, and the quality of flower bud differentiation is poor, there will be a phenomenon of large and small years.

The reasons for the fruit drop of kiwifruit are summarized as the following six points: 1. Single nutrition. Second, serious "overload". Third, the tree is vigorous. Fourth, ignoring prevention. 5. Abuse of hormones. Sixth, the bagging is early.

Weather factors: Plants encounter bad weather during the critical period of pollination, resulting in poor pollination and inability of their ovary to fertilize normally, resulting in fruit drop. Improper manual pollination:

Hand-pollinated pollen is of poor quality or has low activity, making pollination ineffective and leading to fruit drop. Improper fertilization: long-term application of a single fertilizer or the application of low-quality, hormone-high content fertilizer, resulting in the growth and development of the fruit is affected, resulting in fruit loss.

Single cultivar or improper pollination tree configuration.

Single when choosing cultivars.

1. Lack of pollination of fruit trees, wrong cultivation and pollination methods, etc., will affect the quality of pollination and fertilization of fruit trees, resulting in most kiwifruit varieties can not flower and bear fruit, even if some flower, they do not set fruit.

Affected by the weather, it is also possible that the trunk is too good to bear the weight of the kiwi, which is a very tasty fruit, and its taste is sweet and sour.

This is because the ripening period of kiwifruit is very short, and you know it when you usually eat kiwifruit, and if you don't eat it for two days, it will be ripe.

First, if the flowering period is chaotic, if it encounters low temperature frost or dry and hot wind, it will make pollination ineffective, and flowers will appear but not realized.

The second is that the nutrient accumulation after fruit picking is insufficient, if there are too many fruits, the leaves are prematurely senescent, the photosynthetic function is reduced, and the quality of flower bud differentiation is poor, there will be a good old grade size phenomenon.

This is severe frost damage. For plants with severe frost damage, the trunk needs to be cut about 5 cm above the ground to allow it to re-germinate.

After learning about the general control measures of the macaque trees that cause the deformed fruit of kiwifruit.

1. Selected varieties and reasonable cultivation.

2. Scientific and balanced fertilization.

When fertilizing in autumn, reapply organic fertilizer, mix an appropriate amount of phosphate fertilizer and a small amount of nitrogen fertilizer, and add some medium and trace element fertilizers and microbial fertilizers appropriately in conditional areas, so that the fertilization types are complete. Fertilization is mainly radial or furrow fertilization.

3. Create suitable growth conditions.

After learning about the general control measures of the macaque trees that cause the deformed fruit of kiwifruit. 1. Selected varieties and reasonable cultivation 2, scientific and balanced fertilization in autumn fertilization, reapply organic fertilizer, and mix an appropriate amount of phosphate fertilizer and a small amount of nitrogen fertilizer. Fertilization is mainly radial or furrow fertilization.

3. Create suitable growth conditionsPay attention to the creation of growth conditions in the flowering and young fruit stages, and do timely watering and top dressing to prevent the negative impact of bad weather on the growth of kiwifruit.