How to treat the white scale insect of the persimmon tree, and what is the best medicine for the sca

Control method of white scale of persimmon tree

1. Before the persimmon tree germinates in early spring, spray 1 time 5 Baumé stone sulfur mixture or 5% diesel emulsion to eliminate overwintering nymphs.

2. On the basis of scraping the old warped skin, close to before germination, hit 3-5 Baumé stone sulfur mixture, or 29% stone sulfur mixture 200 times of water, or 45% crystal stone sulfur mixture 20-30 times of liquid, which can basically control the damage throughout the year; During the critical period of the second control, in the peak period of overwintering nymphs, 5% scale killing beads or 40% scale star 1000 times liquid were used. The second generation of nymphs can be controlled later, and they can basically not be controlled.

3. The red-edged ladybug and the red-spotted lip ladybug have a certain control effect on the occurrence of persimmon cotton scale, and when the amount is large, the broad-spectrum pesticide should be used as little or as little as possible, so as not to kill and injure natural enemies.

4. Pay attention to the scion**, do not let the scion with insects be introduced. Seedlings that have insects should be disinfected before planting.

5. Manual pruning: timely pruning of persimmon trees' long branches, over-dense branches and weak dead branches can enhance its light transmittance, reduce the probability of being infected with insect pests, and at the same time avoid excessive consumption of nutrients, so that the shape of the plant is more full and beautiful.

For the control of white scale insects, systemic conduction insecticides with high efficiency and low toxicity and long duration of effect can be selected.

1. Protect ladybugs: The black-edged red ladybug and red-spotted ladybug on the persimmon tree are beneficial insects, which will only eat the leaves in a few hours, and can effectively hunt and kill the white scale insects, so I thought.

To prevent and control the damage of white scale insects, it is necessary to protect their natural enemies.

2. Pesticide control: Before germination in early spring, it is necessary to use dimethoate and stone sulfur mixture to coat the branches to eliminate the overwintering eggs, and the remaining eggs will leave the overwintering department in April and May.

bit, before it forms a wax shell, it is sprayed with thiamethoxam.

3. Wrapping the trunk: For the trunk that suffers from serious insect infestation, use waste cotton to wrap it after pruning off the infected parts, and then inject dimethoate solution into the cotton.

Moisten it thoroughly, wrap it with plastic film, and tie the upper and lower ends tightly to effectively kill the white scale insects.

4. Manual pruning: Timely pruning of persimmon trees' long branches, over-dense branches and weak branches can enhance their light transmittance, reduce the probability of being infected with insect pests, and can also be avoided.

Avoid excessive consumption of nutrients, so that the shape of the plant is fuller and more beautiful.

1. Vinegar prevention and control: rub the damaged branches and leaves or fruits with cotton balls or gauze dipped in vinegar, which is convenient and good for no drug residues, and can also play the role of foliar fertilization.

2. Prevention and control of liquor pouring: add 1 times of water with 60° liquor, and the dosage is determined according to the size of the tree. In the temperature rises scale insects.

At the beginning of the activity, peel the soil under the tree to see that the roots can be watered, once every half month, 4 times in a row can eliminate the scale insects.

3. Soda ash. Prevention: spray with soda ash or solution to corrode the scale shell and make it extinct. Use low concentration when the temperature is high, and use high concentration when the temperature is low.

4. Diesel laundry detergent.

Emulsion spraying control: use laundry detergent, diesel, water according to: 200 configuration, first dissolve the laundry detergent with a small amount of water, and then slowly drop into the diesel, stir while adding to form a white emulsion, add water to spray or wash with a brush, cloth dipped in liquid, smear the scale insect part, so that it shells and perishes.

5. Artificial pruning control: insects should be re-cut in winter and summer.

The orchard is then swept and burned. At the same time, fertilizer and water management should be strengthened to promote the extraction of new shoots, renew the canopy, and restore the tree's potential.

Summary. 1. Spraying on the tree for control - 7-8 days after the initial flowering period of persimmon trees (the peak period of adult emergence) spray 25% chlorpyramide No. 3 2500 times; or 2,500 times the profit of extinguishing and sweeping; or more than 1000 times; or permethrin 2000-2500 times.

From mid-month to mid-July, the zombie fruits formed by the victims were manually removed and picked up and buried deeply.

From mid-month to early August, the treatment of the first generation of adult worms (peak emerging) is the same as above. The key part of the spraying is the fruit pedicle.

4. At the same time, the persimmon pedicle insect control was carried out on black jujube trees.

2. Comprehensive control of persimmon scales:

In the first half of the month, the persimmon scale is sprayed on the tree at the peak of the stinging period of 1500-2000 times of the lozenge or 800-1000 times of the speed scale gram and the line of gray butterflies, meticulous and thoughtful.

In the middle of the month, the first generation of eggs of persimmon scales hatched at the peak of 1500-2000 times of chlorchloride; Or 2000-2500 times of high-efficiency cyanide chloride, spraying key parts, branches, leaves, fruits, persimmon pedicles, and treating apple leaf curl moths, tea wing bugs, leafhoppers, etc.

3. Integrated control of persimmon caterpillars

At the end of April and the beginning of April, the trunk is sprayed with a ring; Spray the closed medicine ring in the main stem high rice, 15-20 cm wide, add 50 parts of water (or diesel) to one part of the medicine (pyrethroids), the density of the insect population is large, and spray the second time after 10 days.

In the middle and late months of the month, combined with the above-mentioned spraying to control persimmon caterpillars.

What is the best medicine for scale insects on persimmon trees.

1. Spraying on the tree for control - 7-8 days after the initial flowering period of persimmon trees (the peak period of adult emergence) spray 25% chlorpyramide No. 3 2500 times; or 2,500 times the profit of extinguishing and sweeping; or more than 1000 times; or 2000-2500 times of high-efficiency permethrin mid-July, manually remove and pick up the zombie fruit formed by the victim, and bury it deep in mid-month to early August, and the control of the first generation of adults (peak emeritation) is the same as above. The key part of the spraying is the fruit pedicle. 4. At the same time, the persimmon pedicle insect control was carried out on black jujube trees.

Second, the comprehensive control of persimmon scale in the first half of the month, persimmon scale stinging peak period on the tree spraying 1500-2000 times or speed scale gram 800-1000 times and treatment line gray butterfly, meticulous and thoughtful In the middle of the month, the first generation of persimmon scale eggs hatched in the peak period, sprayed 1500-2000 times; Or 2000-2500 times of high-efficiency cyanide chloride, spraying key parts, branches, leaves, fruits, persimmon pedicles, and treating apple leaf curl moths, tea wing bugs, leafhoppers, etc. 3. Integrated control of persimmon caterpillars At the end of April and early April, the trunk is sprayed with a spray ring; Spray closed medicine ring in the main stem high rice, 15-20 cm wide, add 50 parts of water (or diesel) with one part (pyrethroid), the density of the insect population is large, and spray the second time in the middle and late months of the month after 10 days, combined with the aforementioned spraying to control persimmon caterpillar and branch persimmon caterpillar.

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Now there are a lot of them, white, and the belly is red water! It's on the persimmon tree.

It's time to get your medicine done.

Hello, the persimmon tree knot has white insects on it is powdery lice, with a special insecticide, whitefly in the early stage with 10% imidaxcarb 400-600 times liquid, or 10% acetamethyl emulsifiable concentrate 1000 times liquid, or 25% aceloxin emulsifiable concentrate 1500 times spray socks. It can kill eggs, nymphs and adults, and when the amount of insects is large, a small amount of pyrethroid vinegar insecticides can be added to the solution. Generally, 1 time in 5-7 days, spray 2-3 times in a row.

Use 1000 times of 25% acaricidal emulsifiable concentrate, 1500 times of 50% gram aphid emulsifiable concentrate, 2000 times of Uranus emulsifiable concentrate, and 3000 times of 21% extermination, once every 5 to 7 days, and spray 3 to 4 times in a row.

Generally, the control effect will be better with drugs such as prochlorphos, parachlorin, thiamethoxam, or acetamiprid.

1. Manual processing.

If you find a small amount of lice on the persimmon tree, you can dispose of it artificially, you can apply shellac on the persimmon tree, and then dispose of all the leaves, weeds and other lice that are easy to hide around the tree, wait for a week, you can use a brush and other tools to remove the dead insects, and wash the persimmon tree with clean water.

2. Spray the agent.

Many flower friends do not know how to treat lice on persimmon trees, if a large number of lice are found, you can spray pesticides to prevent and control, first of all, you need to transfer the persimmon tree to a well-ventilated and sunny place, and then spray 100 tinctures, insects, disinfectants and other insecticides, spray once every week, spray 3 or 4 times in a row.

3. Self-medicated agents.

If you feel that it is not safe to spray with chemicals, you can also use your own medicine to eliminate lice, generally lice like to grow in a cool, low temperature environment, so you need to move the persimmon tree to a place with sufficient sunlight, and then dilute it with water and liquor in a ratio of 2:1, spray it once every half a month, and spray it continuously 4 5 times to relieve the crisis.

4. Eliminate the source of insects.

When the persimmon tree enters the winter, it will enter the dormant period, and the lice will also hatch the eggs in the bark of the persimmon tree, first of all, the bark of the persimmon tree needs to be scraped off, and all the eggs that overwinter will be disposed of, and then sprayed once with sulfur mixture or 5% diesel emulsion and other agents, put it in the sun, and control the temperature above 10.

Lice prevention method: usually need to stare at the persimmon tree in full sunlight breeding, can not be placed in the shade, if the persimmon tree is given enough sunlight, not only to prevent the harm of lice, but also to make the persimmon tree photosynthesis, promote the persimmon tree to grow better, increase the ornamental value of the persimmon tree, but also make it bear delicious fruits.

Persimmon trees also need to be pruned once a year in spring, and the persimmon trees grow too densely, do not bear fruits, old branches, and diseased and insect branches are all cut off, which can not only reduce the consumption of soil nutrients by persimmon trees, but also make persimmon trees better photosynthesized and prevent the harm of lice.

The white insects on the persimmon tree, usually pay attention to prevention, keep the persimmon orchard clean, cut off the remaining diseased and insect branches on the tree, scrape off the old rough bark on the trunk, and destroy it after cutting it off. Protecting natural enemies can have a certain degree of control over insect pests. The use of pesticides, before the persimmon tree germinates in early spring, you can spray 5 Baumé stone sulfur mixture or 5% diesel emulsion, which can eliminate the overwintering nymphs.

Like this, it's basically bad to the meat. Most of my family are pesticide earlier, maybe it's okay, but now it's late. But it's still edible, and the skin is removed.

It is persimmon scale, the special drug is to kill phosphorus (alias methylthiothion, didapine, quick culling, GS13005, NC-2964) or 800 times dimethoate plus 2 percent laundry detergent, or add avermectin, once every 7 days, the leaf surface has a cuticle and it is best to hit the back of the leaf, so it is better, remember to scrape the bark at the beginning of next year, and wipe the lime to kill the eggs.