What kind of insect is the persimmon turtle on the persimmon tree?

It's the kind of insect that looks white, very disgusting, squeezing it with your hands, and there will be red blood, looking at more disgusting insects, it can be said that persimmons have been harmed by this kind of bug, and this kind of bug also likes to harm the fruit, you say angry people are not angry. In fact, persimmon trees are relatively simple to manage. Generally, other insect pests rarely occur, and in terms of the climate season in Hebei, persimmon trees are only harvested in summer.

As a result, scale insects are prone to occur after the expansion phase begins.

That is, persimmon cotton scale.

Persimmon scale insect pest: the insect pest is also a common insect pest on the persimmon tree, it is necessary to carry out timely spraying control, I like to have persimmon scale on my own persimmon tree, I will often choose the speed scale gram for effective spraying insect pest area, persimmon tree is my favorite kind of tree, persimmon tree one of the ancient trees that rural people on our side like to plant in the yard the most, persimmon tree fruiting is very much, the meaning is also very good, many friends like to plant persimmon trees at home.

Spray stone sulfur mixture.

Destroy nymphs. It is also possible to scrape off the dead bark of the persimmon tree before wintering to eliminate the nymphs that are lurking in the dead bark and preparing for wintering. During the stinging and hatching period of nymphs, spray in time to eliminate larvae.

The inch moth is so bad, the prevention and control must be explained. In the winter of each year, the pupal period is arranged, the ploughing soil is loose, and the pupa is dug by the way. Dig the dry edge of the ground, wander around two feet, within one inch of depth, carefully sieve the pupae, destroy the pupal place, and fail to defeat the pupae.

Perhaps the persimmon tree is not favored by people, because its eating method is more complicated than that of apples, pears and other fruits, but it is drought-tolerant and humidity-tolerant, simple to manage, and has the characteristics of early fruiting, high yield, and long economic life, which is also very popular with people. Persimmon is a very nutritious fruit, but many people don't like to eat it, because unripe persimmons taste very astringent, and the tongue will be numb. Normally, persimmon trees are very sparse with pests and diseases.

But we can't avoid it, sometimes we don't do a good job of stopping management.

This should be a very harmful bug, very bad for human logarithms, and we should do our best to control it.

It is a harmful insect that is white in color, and if this insect grows on persimmons, it will seriously affect the yield of persimmons.

This is a white insect, it is particularly harmful, it will cause the branches to produce viruses, deformities, premature aging, and will also make the yield of persimmons drop a lot.

Persimmon trees give birth to persimmon turtles, which can be cleared in time in winter, especially in orchards where persimmon scales occur seriously, scrape off the bark of the upturned trees, and clean up all the dead branches and fallen leaves on the ground, destroying its living environment and reducing the number of occurrences in the coming year.

In addition, in winter, overwintering insects can also be eliminated by clearing the garden with chemicals, such as 50% chlorpyrifos 1500 times and 10% high chlorine. Pyripropyl ether 1000 times spray, etc., have a good effect. Secondly, the early stage of persimmon budding, that is, the end of April and the beginning of May, is the time when the persimmon turtle wintering nymphs come out to be active, and it is necessary to seize the period to eliminate the overwintering nymphs.

Persimmon cultivation techniques.

Planting. Persimmon trees are tall and have a long economic lifespan. The planting distance varies according to the variety, region, site conditions, etc., and the row spacing of 5-8 meters is generally appropriate.

The seedless variety of persimmon has the characteristics of unisexual fruiting, and does not undergo pollination to improve the seed setting rate and the yield and quality of fruits.

Parenting management. Fertilizer pipe water:

Proper fertilization is the key to improving persimmon yield. The greatest demand for persimmon trees is nitrogen fertilizer, followed by phosphorus and potassium fertilizer. Young trees should be fertilized with more nitrogen fertilizer to accelerate the expansion of the canopy and enter the fruiting period as soon as possible. After entering the fruiting period, while applying nitrogen fertilizer, it is necessary to appropriately increase phosphorus and potassium fertilizer to promote fruiting and prevent and reduce flower and fruit drop.

The type of fertilization should advocate organic fertilizer-based, inorganic fertilizer as a supplement, organic fertilizer is not only low cost, but also long fertilizer efficiency, comprehensive nutrition, can change the aggregate structure of the soil, not easy to produce excessive element hazards, etc., human and animal manure, green manure, cake fertilizer, manure, garbage, weeds, straw, etc. are good organic fertilizers, but in the application of organic fertilizers should pay attention to rotting and preventing fertilizer loss. Inorganic fertilizer is often used as top dressing, but the dosage, application time and method should be mastered. Some chemical fertilizers, especially calcium, magnesium, iron, boron, zinc, copper, manganese, molybdenum and other trace element fertilizers can be fertilized by foliar spray fertilizer.

In addition, when planting a large area, more leguminous plants such as Acacia purpurea, alfalfa, milk vetch and aggregate grass can be considered as green manure to reduce planting costs and solve the contradiction of insufficient fertilizer sources.

Thinning: Most of the persimmon trees have an obvious central trunk, the main branch level is obvious, the tree growth is strong, some varieties have poor upward growth ability, many branches and the crown is open, the former can be formed into a sparse trunk shape, and the latter can be formed into a natural happy shape. When thinning branches, according to the age and growth of the tree, the method of different branch renewal and homo-branch renewal can be adopted respectively, and the weak and drooping branches can be cut off in a timely manner, and more strong branches can be left to cultivate new vegetative branches to maintain the original fruiting appearance.

The season of thinning is generally carried out after the fruit is harvested, and the persimmon tree can be repaired when it blooms in summer, and the long branches germinated by hidden buds in the crown can be topped or truncated in time to promote the germination of the lower buds to form fruiting mother branches. For large aging trees, long branches can be used to fill gaps in the canopy or the entire canopy can be renewed by thinning branches.

Overcoming Physiological Fruit Drop:

First of all, find out the cause of the fruit drop, and then take corresponding measures.

The main methods to overcome fruit drop are: reasonable fertilization and irrigation, timely control of pests and diseases, artificial pollination, ring stripping of bark, etc.

The insects on the persimmon tree are called persimmon scales, commonly known as tree lice, felt scales, etc., which are one of the most common and most harmful pests on persimmon trees. After the persimmon tree was damaged, in addition to weakening the tree and reducing the yield, it also seriously affected the quality of persimmons. The main natural enemies of persimmon scales are the red-edged ladybug and the red-spotted ladybug.

Extended information: The first instar nymphs are good at crawling, crawling to the young shoots, new shoots, petioles, leaf backs, etc. to suck the sap, and after the second instar, they begin to feed fixedly, fixing on the persimmon pedicle and the surface of the fruit, forming a wax quilt at the same time, and gradually growing up and differentiating into male and female. In mid to late May, it becomes an adult copulator.

The female then forms a white oocyst on her back and begins to lay eggs. The first two generations mainly hurt leaves and new shoots, the last two generations mainly damaged persimmon fruits, and the third generation was the most serious. After the shoots are killed, they form black spots at least and die at worst; When the leaves are seriously damaged, they are deformed and fall early; After the persimmon fruit grows up, it turns from green to yellow to soft, and the fixed part of the insect body is gradually dented, the wood plug is turned black, and it can cause fruit cracking in serious cases, which has a great impact on yield and quality.

Varieties with many branches, leafy leaves, thin skin, and juicy are badly affected.

To eliminate persimmon turtles on persimmon trees, chlorpyrifos and high chlorine can be used. Pyripropyl ether treatment.

Persimmon tree disease control.

Persimmon spot disease. Harmful symptoms: persimmon corner spot disease is a fungal disease, which harms persimmon leaves and persimmon pedicles, causing the fruit to soften and fall off in advance.

The leaf lesions undergo a change stage of light brown, dark brown, reddish-brown and gray-brown, which is irregular and polygonal, with a diameter of 3 to 7 mm. The lesions on the persimmon pedicle are black-brown, mostly at the four corners of the pedicle, round or irregularly shaped, and some also have black edges. The pathogen overwinters on persimmon pedicles or fallen leaves in hyphae and produces conidia for infection in June and July of the following year when the temperature is suitable.

The incidence is more severe in summer rainfall years.

Prevention and control methods: Qingyuan. From the time the leaves fall to the next year's budding, the remaining dead branches, pests and diseases on the tree are thoroughly removed, and the fallen leaves are cleaned.

Enhance the disease resistance of the tree. The main thing is to improve the soil, increase the application of phosphorus fertilizer and potassium fertilizer, and irrigate in a timely manner to prevent water accumulation. Spraying control.

Since the beginning of June, spray 1 to 2 times 1:5:300 to 600 Bordeaux solution (i.e., 1 part of copper sulfate, 5 parts of quicklime, 300 to 600 parts of water), or 600 times of 30% copper oxychloride, or 80% zeb 800 times of solution.

Persimmon round spot disease. Harmful symptoms: persimmon round spot disease is a fungal disease, often mixed with horn spot disease.

A black spot the size of a needle is born on the leaf, with a black spot around it when it expands to 1 mm, and a reddish-brown center. The lesions are 1 to 7 mm in diameter, round or oval, and the lesions are polymerized and connected when they are more than a mole, and after the lesions turn red, a green halo appears around the lesions, and a large number of small black spots are produced on the back of the lesions on the fallen leaves in the later stage. Round brown lesions also occur on persimmon pedicles, which are small in diameter and occur late.

The pathogen overwinters on fallen leaves with mycelium, and is infected by wind and rain from late June to early July of the following year, and the rainfall from June to August induces a major occurrence of the disease.

Prevention and control methods: the same as angular spot disease.

Persimmon powdery mildew. Harmful symptoms: persimmon powdery mildew is a fungal disease, which harms leaves and causes early defoliation, as well as new shoots and fruits. The fungus overwinters on the fallen leaves, begins to infect the young leaves the following year, and continues until autumn when the typical powdery patches appear on the dorsal surface of the old leaves.

Prevention and control methods: clear the garden in winter to reduce the source of infection, spray stone sulfur mixture in spring, and spray 1:5:400 Bordeaux liquid from June to July.

Persimmon scales. Also known as persimmon felt scale, nymphs and female adults are harmful to fruits and new shoots, affecting the yield and quality of persimmons. Four generations occur in a year, overwintering on the cortical cracks of 3 or 4-year-old branches or the coarse bark crevices of the trunk and the stems of dried persimmons.

In mid to late April of the following year, they leave the wintering site and climb to the young shoots, new shoots, petioles, and leaf backs to suck the sap, and then fix the persimmon on the pedicle and the surface of the fruit. <

Persimmon scale, also known as persimmon felt scale. Nymphs and female adults are used as pests to damage fruits and shoots, which affects the yield and quality of persimmons. Four generations occur in a year, overwintering on the cortical cracks of 3 or 4-year-old branches or the coarse bark crevices of the trunk and the stems of dried persimmons.

In mid to late April of the following year, they leave the wintering site and climb to the young shoots, new shoots, petioles, and leaf backs to suck the sap, and then fix the persimmon on the pedicle and the surface of the fruit.