How to treat white spots on persimmons? What s the best way to do it?

Usually when persimmons grow to maturity, they will have many white spots. This is actually the persimmon tree.

Persimmon scale insects.

The fact of the invasion. This pest tends to occur on persimmon trees and can occur several times a year. It is very concealed and not easily spotted.

It usually infringes on the fruits and leaves of the persimmon tree. If there is no prevention and control in the early stage, it will become an ash worm around August and September, which is more difficult to eliminate. White spots on persimmons are not a disease, but a pest.

At first, most people mistakenly think that this is also a disease, but it is actually a trace left by a scale insect.

There are many species of scale insects, such as grass scale insects, persimmon scale insects, etc. Among them, white spots on persimmons.

It is caused by persimmons, which have a great negative impact on persimmon trees. This white spot is caused by persimmon insects growing on persimmons. Cut off the branches damaged by the persimmon insect and spray the branches with bummelane nuts when the persimmon tree sprouts.

If a milky wax scale insect is produced, the wax scale is used to kill the insect. With the method of winter pruning, the branches will be damaged by pests and diseases.

As well as the old bark, cut off and finally burned off the overwintering larvae. In addition, the remaining persimmon pedicles may also have larvae, which should be cut off in time. Before germination, use Pomeranian 5 degree stone sulfur mixture.

Spray the trunk of the tree to kill its larvae. Before the larvae turn into wax shells, spray with insecticides or dichlorvos.

If it has become an ash scale insect, it should be sprayed with a wax scale to kill it. If all the insects crawl out of their shells, this is the most serious period of the insect plague, and the third generation is also the most difficult.

It is best to use dichlorvos or phosphine.

Spraying. The nymph of the persimmon tree.

It usually lurks in the crevices of the root bark or the tip of the persimmon pedicle and overwinters on the persimmon tree. Every year after April, the weather warms up, and the silent nymphs gradually become active, causing damage to the persimmon trees. After May, the larvae enter the persimmon and produce white spots on the surface of the persimmon.

The control of persimmon scales should be carried out gradually from mid to late September each year before persimmon scale planting, and the method of trapping adult persimmon scales can be used. The method is to tie a little straw to the base of the persimmon tree to let the persimmon scales enter the winter, and then remove the straw and clean it before spring arrives.

For the white spots on the persimmons, some nutrient solution should be sprayed appropriately, or some pesticides for the prevention and control of pests and diseases should be used, or sufficient light conditions should be ensured, and proper watering and fertilization should be carried out.

This problem can be solved by turning the soil, spraying pesticides, spraying pesticides, watering, applying farm fertilizer and spraying nutrient solution.

Be sure to spray chemicals, before the larvae have fully grown, so that the root cause of the problem can be solved.

This white spot is a persimmon scale insect growing on the persimmon. To cut off the branches that have been damaged by the persimmon scale insects, spray the branches with Baumé 5 dimethoate when the persimmon tree germinates. If a milky wax shell worm is produced, it is necessary to use wax cocoin to kill the insect.

The white spots on the persimmon are infested by the persimmon scale shellworm, and the larvae can be sprayed with an insecticide before they become wax shells.

It may be that it has been damaged by the persimmon scale insect, and in this case, it is necessary to spray pesticides in time, and usually supplement nutrition in time, water more and fertilize more, and prune in time.

The white spots on persimmons are generally pink white scales, which can be used for some control. It is necessary to spray pesticides, and it can also be combined with the use of trace element foliar fertilizer to mediate the absorption of nutrients by persimmons, promote healthy growth, and effectively prevent and control the occurrence of pests and diseases. This phenomenon can be alleviated.

The white spots on the persimmon tree are infested by the persimmon scale insectThis pest is more likely to occur on persimmon trees, and it occurs several times a year. During winter pruning, the branches that have been infested by insects should be cut and burned, and the persimmon tree should be sprayed with a baume 5 degree stone sulfur mixture before germination.

Before the larvae become wax shells, insecticides or dichlorvos are used to control them. If a white wax shell insect has formed, it should be sprayed with wax scale.

1. What are the white dots on the persimmon tree?

When the persimmon grows and matures, there will be a lot of white spots, which is actually the persimmon tree is attacked by the persimmon scale insect. This pest can easily occur on persimmon trees, it can occur several times a year, it is very hidden, people are not easy to detect, and usually attack the fruits and leaves of persimmon trees.

If there is no prevention and control in the early stage, it will become a white wax shell insect around August and September, and it will be more difficult to eliminate.

Second, the maintenance of persimmon trees

1. Temperature: The temperature suitable for its growth is between nine degrees and twenty-three degrees, and the temperature when the fruit is ripe should be maintained at 19 degrees to 23 degrees.

2. Watering: It is more drought-resistant, if the annual rainfall is more than 500 ml, it does not need to be irrigated additionally, if it is a potted plant, it is generally watered once a week, and the amount of watering each time is not too much, so as to ensure that the soil is completely moist.

3. Fertilization: It can tolerate barrenness, but it does not mean that it does not need to be fertilized, under normal circumstances, fertilization is applied once every two weeks during the growth period, and water-soluble fertilizer can be applied to the sea, and no fertilization is required during the non-growth period, and fertilization is needed once before winter to ensure that it can survive the winter safely.

4. Light: It likes to live in a sunny environment, if it is an indoor maintenance plant, it can be allowed to receive all-day sunlight without human intervention. If it is a plant that is maintained indoors, it needs to be maintained in a sunny place, and the light time should not be less than 8 hours a day.

In fact, this is one of the main pests of persimmon trees - persimmon scales.

Persimmon scales use adults and nymphs to suck the juice of young branches, leaves and fruits, so that the young branches die, the leaves shrink and deform, and the fruit softens in advance to cause early fall, and seriously affects the quality and sales of persimmon fruits, causing great economic losses to fruit farmers. The body of the persimmon scale is red, but the adult worm will cover the back with a white felt-like shell, about 3 mm long and 2 mm wide, so the affected persimmon tree appears to have many white spots on the tree.

Originated in the Yangtze River basin of our country, it is now in the western part of Liaoning, the Great Wall line through the south of Gansu, folded into Sichuan and Yunnan, south of this line, east to Taiwan Province, and is cultivated in various provinces and regions. It is cultivated in Korea, Japan, Southeast Asia, Oceania, Algeria in North Africa, France, and the United States.

Persimmon cultivation in China is extensive, except for the cold areas such as Heilongjiang, Jilin, Inner Mongolia and Xinjiang in the north, most provinces and regions are planted. Guangxi, Hebei, Henan and Shaanxi are the four main producing areas of persimmon, and the output accounts for about half of the country.

The persimmon has white spots, mainly caused by persimmon cotton scale insects, persimmon cotton scale insects will reproduce larvae after growing on the persimmon tree, if not treated in time, there will be more and more, so once found, to timely insecticide control, you can use dimethoate to smear the branch control, spray Baume 5 degrees stone sulfur mixture insecticide, and prune off the diseased branches in time in winter.

Persimmon cotton scale insect will give birth to a white wax layer on the surface shell after adulthood, with the protection of the wax shell, it is generally difficult to kill it, so it is necessary to kill the insect in time before the larvae grow wax shells, spray 1000 times dichlorvos or 1500 times insecticide to kill the larvae, for the adult insects spray 1000 times insecticide can also be removed.

At the beginning of spring, before the persimmon tree germinates, about the white spots on the persimmon, the persimmon tree should be sprayed with Baumé 5 degrees stone sulfur mixture, and the bottom layer of the branch and the leaves should be sprayed, which can eliminate most of the overwintering larvae, and then apply dimethoate oxide on the branch for control.

Pruning off most of the dead and diseased branches in winter, and then stripping off the old bark can effectively reduce the survival rate of pests and diseases. For some diseased branches, leaves and fruits, they should also be pruned in time, and the diseased parts that are pruned should be burned.

There are some ladybugs that are the natural enemies of persimmon scale insects, if there are these insects can kill persimmon scale insects on a large scale, mainly black beak red ladybug and red dotted lip ladybug, so if you find these ladybugs on persimmon trees, try to protect them well, so that your persimmons can grow better.

If you can eat it, you should peel it and eat it.

The white spots on the persimmon are scale insects, which begin to sting from mid to late April, crawling to young leaves, petioles, and leaf backs to suck the juice.

The first and second generations mainly harm leaves and twigs, the first.

The third and fourth generations mainly harm the fruits, with the third generation being the most serious. Initial medication is required to cure. However, persimmons attached by scale insects can be eaten, which does not affect the safety and taste of persimmons, and can be removed.

Control of scale insects:

1. Scale insects are often sessile and parasitic, with tiny insect bodies, mainly carried by host branches, scions, fruits and even tree trunks and spread over long distances. Therefore, the procurement, transportation process and protection areas of seedlings, scion and fruit should be quarantined to prevent the spread of the virus.

2. Strengthen orchard management, timely cultivation and loosening soil, fertilization and irrigation to meet the needs of fruit trees for water and fertilizer, which can enhance tree potential and improve the insect resistance of fruit trees. Combined with plastic pruning, the insect-bearing branches can be burned intensively, which can greatly reduce the number of insect mouths. Under natural circumstances, scale insects are less active, their own transmission and diffusion ability is limited, and their distribution has certain limitations.

3. The natural enemies of scale insects include pathogenic microorganisms and natural enemy insects, of which the latter is the most important. For example, ladybugs are the main predatory natural enemies of scale insects, and the harm of Australian ladybugs, big red ladybugs and black margin red ladybugs can be effectively prevented and controlled by providing shelter or artificial assistance, releasing Australian ladybugs, big red ladybugs and black marginal red ladybugs.