What should I do if there is white juan disease in the grape soil?

Pathogens can invade from grape root wounds, grafting joints, mechanical injuries, insect bites, frost damage, root burning, etc. After the disease, the growth of the grapes was significantly weaker, and the fertilization did not improve. When the roots were peeled open, it was found that many brown sclerotia had grown from the rotten roots, which had a mushroom smell.

Therefore, in order to prevent the probability of disease, it is necessary to avoid building vineyards in waterlogged depressions and places with heavy soil clay, but choose to build vineyards in places with good irrigation and drainage system equipment and low groundwater level, which can prevent white silk disease from the source of soil and water.

In order to prevent the spread of diseases, the soil can be disinfected by root irrigation. Commonly used disinfectants are: 10% di-effect 200 300 times solution, 50% dycenum 400 500 times solution, 70% methyl tobuzine 800 1000 times solution, 50% benzolite 1000 times solution, about 10 kg per plant.

Frost damage and burns caused by excessive fertilization are all gateways for germs to invade. These pathogens are transmitted mainly through wounds caused by field tillage, underground pests and soil nematodes. Therefore, soil pests and underground nematodes are the vectors of this disease.

There are white silky hyphae (hence the name white silk disease) at the aboveground rhizome, and white silk filaments are often formed at the base of the stem near the ground and on the soil surface near it. As the diseased tissues decay, water and nutrients cannot be transported, so the aboveground leaves of the diseased plants first turn yellow, and then gradually die. Or 800 times the liquid of methyl phosphorus, etc., you can also choose azoxystrobin, pyraclostrobin and other agents mixed with some of the agents, note that when the above two agents are mixed with emulsifiable concentrate, there may be pesticide damage, you should be cautious!

When the onset is severe, it should be prevented and treated every 7 days, and 2-3 times in a row.

Deeply plough and change the soil, strengthen field management, and drain the water in the ground in time after rain. The pathogen overwinters in the soil or on diseased residues with sclerotia or hyphae, and can survive in the soil for 5-6 years. It can also invade the ovary stalk or pod.

Seeds can also carry bacteria. The germs spread in the fields by running water or insects. It is prone to high temperature, high humidity, heavy soil clay, poor drainage, low-lying land and rainy years.

Immediately after the rain, the diseased plants quickly withered and died. The disease is severe in continuous cropping and early sowing.

When you buy seedlings, you can soak carbendazim for a while, you can also eat more organic fertilizers, do a good job of drainage, reduce the possibility of insect bites, lower the groundwater level, you can cut the rotten roots clean, and apply some copper sulfate solution.

1) When transporting fruit seedlings, strict inspections should be carried out to completely eliminate diseased seedlings. (2) Seedling disinfection: seedlings can be put into 1% copper sulfate solution or 2% lime milk, soaked for 1 hour, washed and planted, or 70% thiophanate-methyl wettable powder and 50% carbendazim wettable powder can be used in 8001000 times of the solution.

New vineyards should avoid waterlogging and clay soils; When building a park, a drainage and irrigation canal system should be built to reduce the groundwater level to reduce the disease conditions.

The management of the vineyard can be strengthened, the organic fertilizer and phosphorus and potassium fertilizer can be increased, and the soil in the garden can be improved, and the acidic soil can be neutralized with calcium hydroxide 100 150 kg per mu, or use more fully decomposed organic fertilizer, such as low-lying waterlogged plots to pay attention to drainage; Reasonable pruning of grape vines, timely thinning of flowers and fruits, and adjustment of fruit tree load; And strengthen the prevention and control of underground pests and nematodes.

Be sure to inspect the seedlings before planting, throw away those diseased seedlings, and then the seedlings can be sterilized by putting them in a copper sulfate solution.

In fact, the best way to avoid such a disease is to pay attention to the timely fertilization of the entire breeding process, so as to achieve a very good state, and then let the pest and disease be well treated.

It should be that the concentration of salt in the soil is too high, coupled with frequent irrigation during the high temperature period, and the salt accumulation after water evaporation and improper fertilization caused by Baijuan's disease, when fertilizing, it should be as uniform as possible, avoid contact with the root system, and it is recommended to use water-saving irrigation method for irrigation.

Summary. 3 fans.

From the analysis of the root characteristics, the possibility of white striped feather disease is greater, this disease first harms the fine roots, and gradually develops to the lateral roots and taproots, the affected root tissues become brown and rot, and even the surface is entangled by the white mycelium cord composed of pathogenic hyphae, and there are hyphae and mycelium cords in the soil around the diseased roots. After the root tissue of the victim is decayed, the epidermis is still intact like a sheath on the outside of the xylem. In later stages, the xylem decays and black sclerotia grows on the surface of the diseased tissue.

The powdery powder you are talking about is a white cord of pathogenic hyphae that become black until the vine dies. This disease is mainly based on prevention, but it has been infected, and it is necessary to timely treat the soil, tree moisture, organic fertilizer and medicine (specifically go to the pesticide store for consultation).

The roots of the grapes look like powdery powder, and some of the roots have rotted.

Hello This is a very good question, I need a little time to answer, please be patient.

3 fans from the root of the analysis of the special frightened, the possibility of white stripe feather disease is greater, this disease first damages the fine roots, and gradually develops to the lateral roots and taproots, the damaged root tissue becomes brown and rotten, and even the surface is entangled by the white mycelium composed of pathogenic hyphae, and there are also hyphae and mycelium in the soil around the diseased roots. After the root tissue of the victim is decayed, the epidermis is still intact like a sheath on the outside of the xylem. In later stages, the xylem decays and black sclerotia grows on the surface of the diseased tissue.

The powdery powder you are talking about is a white cord of pathogenic hyphae that become black until the vine dies. This disease is mainly based on prevention, but it has been infected, and it is necessary to timely treat the soil, tree moisture, organic fertilizer and medicine (specifically go to the pesticide store for consultation).

Summary. The roots of the grapes look like powdery powder, and some of the roots have rotted.

Hello, it's a pleasure to serve you I'm sorting out the answers, please wait a while This is called grape white rot, also known as rot disease.

Hello! What kind of medicine do you use?

Grape powdery mildew is a disease that occurs on grapes caused by the fungus Lepsichord. It mainly harms young organs such as leaves, new shoots and fruits, and old leaves and colored fruits are less damaged.

Grape powdery mildew occurs all over China, with severe cases in North China. Generally from mid-June to mid-September, powdery mildew can occur as long as the climatic conditions are suitable. When the temperature is 29-35, the disease develops rapidly, drought, drought after rain or alternating dry and wet, the epidemic planting suitable for the disease is too dense, too much nitrogen fertilizer is applied, pruning and picking the secondary shoots are not timely, the branches are long, the orchard is closed, the ventilation and light transmission are poor, the plant epidermis is fragile, and it is easy to get sick.

Young shoots, young leaves, and young fruits are more susceptible to disease in older and mature tissues.

The control methods of grape powdery mildew are mainly agricultural control and chemical control. Firstly, high-resistance varieties were selected and orchard management was strengthened to enhance tree potential. In the early stage of the disease, the diseased leaves should be removed and cleaned in time to eliminate the source of infection.

Prune reasonably to ventilate and transmit light to the tree. Combined with pharmaceutical prevention and control. In the early stage of powdery mildew, the agent is sprayed with 800-1000 times of 20% powdery rust.

In order to prevent the emergence of drug resistance and improve the control effect, methyl tobuzin, compound carbendazim, antibacterial special, white powder, etc. can be used alternately.

The basket is full of solid beads and slippery, and the entrance is sweet and cold. Wen Yuan knew this, and Lu Huamo asked Jin Pan"。This is a poem about grapes written by the Yuan Dynasty poet Zheng Yun.

Indeed, grapes are loved by many people because of their round and lovely appearance, sweet and sour taste, appetizing and spleen-invigorating, and preventing cardiovascular diseases. Grapes are one of the oldest fruit trees in the world and are now widely cultivated. But when grapes are eroded by a common disease, white rot, yields drop and growers suffer.

So how to better prevent and **, let's take a look.

The first <> white rot is called hemoglobin, and when grapes are picked, pruned, or exposed to extreme weather or insect pests, holes appear in the plants, giving bacteria a chance to enter. Especially in extreme weather, large-scale damage to plant leaves, stems and other parts will lead to a high incidence of white rot. The disease is closely related to the grape growth process and becomes more severe when the grapes enter the coloring and ripening stages.

When the temperature and humidity are high, it is easy to induce white rot.

Summer is the most suitable season for white rot to spread due to abundant rainfall and high temperatures. After heavy rains, the relative humidity can reach 95%. White rot is most common during the week after the rain, especially after a storm.

The route of infection of the bacteria is the soil splashing of raindrops on the spikes of the fruit. Improper management, failure to drain and weed in a timely manner, unreasonable trellis layout, and messy branches can all lead to the epidemic of white rot.

The fungus first invades the fruit stalk and ear, causing a round light brown lesion on the surface of the fruit to appear in the form of water stains, and then the lesion gradually darkens and rots, spreading to the fruit to cause the same symptoms. In the later stages of the disease, faint particles appear on the stalks, ears and surface of the affected fruits, which are the vectors of bacterial transmission, called conidia, and when the temperature and humidity are suitable, the bacteria will spill over and spread to other plants. Diseased fruits tend to fall off after rotting, and when dried, brown or grayish-white stiff fruits will form.

White rot should not only be treated, but also prevented, that is, the diseased strains should be treated, and the accompanying healthy strains should also be prevented from being infected by the diseased strains. The combination of prevention and control is the best way to minimize damage. Here's how best to prevent and**.

The grapes were ripe immediately, but powdery mildew was severe.

Pesticide control: 1) During the overwintering period, spray or coat the branches with a dilution of 3 to 5 degrees of stone sulfur mixture in Baume. Note that susceptible flowers such as melon leaf chrysanthemum cannot be applied. Spray sulfur powder on the ground, generally use 25 grams to 30 grams per 70 square meters to eliminate the source of overwintering bacteria.

2) The growth period can be sprayed with protective agent before the onset of the disease, and the systemic agent should be sprayed after the onset of the disease, according to the symptoms of the disease, the growth of flowers and trees and the climatic conditions and the characteristics of pesticides, the interval is 5 to 20 days to apply the pesticide once, and the application is 2 to 5 times. For a season of flowers, one systemic agent can only be applied 1 to 2 times. The type of pesticide should be changed frequently to avoid the development of resistance to pesticides.

3) When the disease is in full bloom, it can be sprayed with 15% powdery rust 1000 times, 2% antimycomycin water 200 times, and 10% polyantimycin 1000 to 1500 times. Repeated use of traditional medicines reduces the effect of antibodies produced by germs, so it is recommended to use them alternately. In addition, you can also use 1000 times of liquor (alcohol content 35%), spray once every 3 to 6 days, spray 3 to 6 times continuously, and rinse the leaves until there is no white powder.

4) Flowers and trees planted in greenhouses, greenhouses and other protected areas, in addition to spraying the above-mentioned various agents, can also be sprayed with fumigants and dust. Before or after planting, the empty shed should be disinfected, 250 grams of sulfur powder and 500 grams of sawdust should be used for every 100 square meters, evenly mixed, divided into 10 piles, lit with red-hot briquettes or charcoal, not burned with open flames, and closed for a day and night. In the process of fumigation, fire should be strictly prevented.

Long-term smoke is prone to drug damage, so it should be used with caution. During the plant growth period, 45% chlorothalonil tobacco agent was used before the onset of the disease.

Powdery mildew can occur from seedlings to heading. It mainly harms wheat leaves, but also stems and ears. Small yellow dots begin to appear on the leaves, which then expand into round or oval lesions with a white powdery mold layer on the surface.

In general, there are more upper blades than upper blades, and the back of the blades is more than the front. The mildew is dispersed separately in the early stage, and then combined into a large mold spot, which can even cover the whole leaf, seriously affecting photosynthesis, disturbing the normal metabolism, causing premature aging and yield loss.

Grape powdery mildew is harmful to the leaves, fruits, vines, etc. of grapes, and green young tissues are the most susceptible to the disease. The leaves are damaged, producing grayish-white patches covered with white powder. In severe cases, the white powder can cover the whole leaf, wither and fall off.

The young fruit is damaged, and the star-like pattern appears on the green patch first, and the powdery mildew fruit is not easy to grow, small and sour.