How to treat a large area of willow rot disease, what medicine to use?

1. Dry rot: mainly occurs in the main pole, large branches and bifurcations. At the beginning of the disease, it is dark brown, water-stained lesions, slightly swollen, cortical tissue decays and softens, there is a smell of sake lees under the skin, water oozes out when pressed by hand, and then loses water and sinks, sometimes the bark of the diseased part is ulcerated, and even becomes filamentous, and the lesions sometimes have obvious black-brown edges.

Under the right conditions, scaling up is faster than lateral. When the diseased part surrounds the trunk for a week, the upper part of the tree dies, the cortex decays, the fibers are separated like hemp, and the xylem sapwood is also discolored. In the later stage, many pinhead-sized protrusions are developed on the lesions, that is, the conidia of the pathogen.

In wet weather, yellow, orange, or red filamentous conidia angles are extruded from the conidia orifice.

2. Blight disease: mainly occurs on seedlings, young trees and branches of large trees. At the beginning of the disease, it is dark gray, and the diseased part expands rapidly, and after a week of surrounding, the upper branch dies.

The main methods for the prevention and control of willow rot are as follows:

First, after scraping off the scars or longitudinal scratches on the lesions, use 30 times the liquid of the original solution of the cure of decay or the crystals of stone sulfur mixture and "107" super glue, and apply the lesions once;

The second is to use 50% antibacterial special 50 times solution, 70% methyl tobuzine 30 times solution, 40% carbendazim 100 times solution, 40% formarsine 50 times solution, 70% mancozeb 100 times solution, 10% alkaline water (sodium bicarbonate) and other fungicides for prevention and control, once every other week, two to three times in a row.

Third, the seriously diseased young trees should be uprooted in time and burned in a centralized manner; Scraped diseased bark is buried or incinerated to remove the source of disease; In winter and summer, the main trunk is whitened with quicklime and sulfur powder; Minimize wounds and seal or paint wounds.

The fourth is to strengthen the tending and management of young trees, timely irrigation, enhance tree potential, and improve disease resistance.

When the disease is mild, the lesions on the branches can be cut at a distance of centimeters longitudinally and horizontally, cut the knife marks as deep as the xylem, and then apply 15% caustic soda or 1:10 1:12 soda, or methyl tobuzin.

Select strong seed strips without pests and diseases for propagation, appropriate thinning of plants, strengthening ventilation, controlling irrigation, and timely drainage; Sowing seedlings, seedlings should be planted in time, seedlings should be fixed, daily tending management should be strengthened, and the ability to resist pests and diseases should be improved;

Remove and burn pest branches and dead branches and leaves to prevent the breeding of pests and diseases. It can also be used to kill adults, larvae and eggs; Maintain natural enemies and other methods of prevention. It can also be used for the prevention and control of dimethoate, trichlorfon, pine borer, imithion emulsion, Bordeaux liquid and other drugs.

Summary. Hello dear I am happy to answer your questions, I hope my answer can help you, the answer is as follows: the occurrence of poplar rot disease is closely related to the amount of bark moisture, the bark water content is low, which is conducive to the growth of mycelium.

Therefore, afforestation should be planted at any time, watered with sufficient water, shortened the seedling return period, and enhanced resistance. Soaking with water before planting can make the seedlings absorb enough water, and whitening the trunk in time after planting can effectively reduce the occurrence of rot disease.

Hello dear I am happy to answer your questions, I hope my answer can help you, the answer is like a fiber: the occurrence of poplar rot disease is closely related to the amount of bark moisture, the bark water content is low, which is conducive to the growth of mycelium. Therefore, afforestation should be planted with the shortage, watered with sufficient water, shortened the seedling return period, and enhanced resistance.

Soaking with water before planting can make the seedlings absorb enough water, and whitening the trunk in time after planting can effectively reduce the occurrence of rot disease.

Poplar rot fungus has the characteristics of acid-loving and acid-like spots, smearing lesions with 10% alkali (rolling vertical sodium carbonate) to change the living conditions of pathogens, and the effect is obvious. In winter or early spring, apply 50-100 times of 40% Fumei arsenic to the lesions, or the spray effect is very good, and you can also use 3-5 degrees of stone sulfur mixture or 50% antibacterial special 500-1000 times liquid spraying, the effect is better. It is necessary to completely remove diseased seedlings and trees to reduce infection.

For the mildly susceptible diseased plants, use a knife to obliquely draw the left and right parts of the lesions and the browned part of the skin into a net, and the knife is deep into the xylem, and then apply 110 times alkaline water or 200 times antibacterial special or Baume 5 degree stone sulfur mixture on the lesion part. Seriously susceptible plants should be removed in time, and seriously infected forests should be completely removed.

In early spring, spray stone sulfur mixture on the trunk of poplar trees to eradicate the source of germ. You can also apply 10% sodium carbonate to the lesions, ** the effect is obvious, some of the susceptible plants are mild, you can use a knife to spread the skin and the brown part of the skin, the left and right obliquely cut into a net, deep until the xylem, and then apply 200 times of the lesions with antibacterial special or Baume 5 degrees of stone finch limb sulfur mixture.

I want to smear the trunk with alkali, what type of alkali should I use?

Sodium carbonate. Is caustic soda OK, dilute it.

Yes, be careful not to overdose.

Can you give me a guide on the concentration?

Or soda ash OK.

Caustic soda is sodium hydroxide, the chemical formula is Naoh, commonly known as caustic soda, caustic soda, is a strong alkali with high corrosiveness, generally in the form of flakes or granules, soluble in water and forms an alkaline solution, and deliquescent dissipation, easy to absorb water vapor in the old air. It has strong alkalinity, and has strong corrosiveness to **, fabrics, paper, etc.

It is recommended to use sodium carbonate.

There is no specific dosage formula, so I am afraid that if it corrodes to the roots, it will not be saved.

Summary. **Drugs.

1) 10% sodium carbonate can be applied to the lesions, and the effect is obvious.

2) Generally, in winter or early spring, 50-100 times of 40% Fumei arsenic can be applied to the lesions, and 50% antibacterial special 500-1000 times liquid can also be sprayed, and the effect is better.

3) For the less susceptible diseased plants, you can use a knife to cut the lesions and the browned part of the skin into a network obliquely from left to right, deep until the xylem, and then apply 200 times antibacterial or Baumé 5 degree stone sulfur on the lesion part.

What medicine is good for poplar rot disease.

Hello dear, I'm glad that I can answer for you. The following pesticides can be used**110% alkaline water (sodium carbonate) 2

40% Fumei arsenic wettable powder 50 times liquid 340% antibacterial special wettable powder 50 times liquid 45% Tian'an water agent 5 times liquid 5

60% sodium humate Hu Zhi 75 times liquid 6 70% thiophanate-methyl wettable powder 1 part plus vegetable oil 5 parts ** drug.

**Drug (1) can apply 10% sodium carbonate to the lesions, **The effect is obvious. 2) Generally, in winter or early spring, 50-100 times of 40% Fumei arsenic can be applied to the lesions, and 50% antibacterial special 500-1000 times liquid can also be sprayed, and the effect is better. (3) For the less susceptible plants, you can use a knife to cut the lesions and the browned part of the skin into a net obliquely from left to right, and then apply 200 times of the degenerate mold fungus or talk about Baumé 5 degrees of stone sulfur sail to slow the part.

The willow tree talks about Qiqing has a great role in greening the environment, and the willow tree is very tenacious in the disease, it is relatively easy to plant, and it is worth protecting! So what should you do if the willow tree is diseased? Don't worry, I'll help you analyze!

How to prevent and control willow diseasesAbout the prevention and control methods of willow diseases: (1) The dead or seriously infected trees and dead branches should be cut down or pruned in time, and the trees and branches that are cut down should be burned in a concentrated manner to prevent the spread of germs. In the future, it is necessary to select suitable disease-resistant tree species, and do a good job of renewing and planting diseased tree sections in a timely manner.

2) Strengthen the management after planting to promote the healthy growth of the forest, poplars and willows on both sides of roads, rivers and ditches, and use white coatings (5kg of quicklime, sulfur powder, 2kg of salt, 36kg of water) to prevent sunburn or. How to prevent and control willow diseases (3) If necessary, the upper part of the main trunk of the diseased tree should be cut and the bark of the diseased tree should be coated with 50% carbendazim wettable powder, 25 times liquid or 10% lye, plus a small amount of diesel. For larger lesions, anti-rust paint or 5% anthracene oil emulsion stock solution or arsenic flat solution or non-dephenolized washing oil or 3 times alkaline water can be applied to the lesions.

4) Advocate the use of Corruption No. 1. Method: Use a scraper to scrape the scars on the tree into a stubble prism, and scrape into the bark, and use a brush to evenly apply the liquid medicine to the scars, and 200-250 scars can be used per kg of No. 1 original drug.

For prevention, the original drug can be diluted 20-25 times and evenly applied to the main stem or side branches. Generally, the ring peeling mouth of the young tree should not be coated with the original drug, so as to avoid pesticide damage. Although the willow tree is adaptable, we should also improve its branches and leaves in time, so that we can improve the willow's ability to resist pollution and improve its ability to resist pruning.

There are also many functions of willow trees, for example, catkins can be made into pillows, or wicker can be woven into baskets or frames, so we call on everyone to take care of trees!

Hello dear, timely pruning, removal of diseased leaves, removal of diseased residues, centralized burning and treatment of hail bumping. In the rainy season and before the rain, do a good job of cleaning and draining the ditch, keep the drainage smooth, reduce the relative humidity, and reduce the hair element. Early spraying of drug control with disease control, can be sprayed with 50% colloidal sulfur 200 times liquid, or 45% stone sulfur mixture crystalline source talk or ointment 300 times liquid, or 50% thiophanate-methyl sulfur suspension 700 times liquid, or 25% powder rust rather wet powder 2500 times liquid spraying prevention and control, 10 15 days spray 1 time, even prevention 3 4 times for the appropriate Oh pro.

It is caused by the larvae of the longhorn beetle.

It can be spawned at its peak in July and August.

Spray the trunk with 100-200 times of 50% thiophos or 200-400 times of 40% dimethoate EC.

For new fecal holes.

Place grams of aluminum phosphide tablets into the cavities.

Or use 80% dichlorvos 100 times solution.

Injected into the cavity.

Then plug the cavities.