What is chestnut kernel rot? How to prevent it?

Chestnut fruit rot is due to chestnut tree anthracnose, which is a common disease that damages shoots and leaves, often causing large amounts of fruit to rot. The pathogen likes high temperature and high humidity environment, and humidity has the greatest impact, so the disease is more serious in the rainy season, and the disease is more serious in orchards with extensive management and humid shade.

There are several prevention and control methods:

1. When clearing the garden in winter, combine pruning to remove diseased branches, diseased leaves and diseased fruits on fruit trees, and concentrate on burning with fallen fruits and fallen branches, and spray 600-800 times of 50 carbendazim wettable powder once in the whole garden to reduce the source of pathogens in the second year.

2. Prune the fruit trees to improve the ventilation and light transmittance of the fruit trees, do a good job in the pest control of the orchard in time, and reduce the damage to the fruit trees when working in the orchard.

3. Timely harvesting, during the harvesting and storage period, to avoid fruit injury and reduce the conditions for the invasion of pathogens.

4. In the annual disease growth period of April, May and early August, spray a pesticide on fruit trees for prevention and control, which can be treated with Baumé stone sulfur mixture, or lime half-volume Bordeaux solution, or 65% zeb zeb wettable powder 800 times liquid.

So, how can you tell if a tree is diseased when the fruit is not ripe? There are the following judgments.

1. Symptoms of leaf damage: After the chestnut leaves are harmed by anthracnose, irregular to round, brown or dark brown lesions grow on the leaves, with reddish-brown thin edges, and expand along the leaf veins or petioles, with many small black spots.

2. Symptoms of branch damage: After chestnut branches are harmed by anthracnose, the young buds are water-stained, such as wilting and dying after being scalded by boiling water, and pink conidia are piled up when wet. Chestnut tree twigs are prone to wind breakage after being damaged.

3. Fruit damage symptoms: when chestnut fruit is harmed by anthracnose, brown lesions grow on the fruit, with small black spots, generally starting from the top of the fruit, extending to the bottom of the fruit along the side, the peel turns black, and there are gray-white mycelium. After the onset of chestnut kernels, nearly round necrotic lesions are born, brown or black-brown, and then decay and dry up to form cavities, commonly known as "black pointed fruit".

Anthrax occurs during the growth phase and causes early fruit drop.

Chestnut kernel rot, also known as chestnut black spot disease, mainly occurs during storage and transportation, forming necrotic spots on chestnut seeds, causing chestnut kernels to deteriorate or rot, and seriously affecting the quality of chestnuts. Prevention and control methods: (1) Strengthen cultivation management, enhance tree potential, improve tree disease resistance, and reduce the disease of tree branches, (2) Scrape off dry rot spots on trees in time, cut off diseased and dead branches, and reduce pathogen infection.

3) When harvesting, pay attention to reducing the mechanical damage of chestnut fruit. Rinse the fruit with salt water, remove the floating diseased fruit grains, and remove the good fruit grains to dry and store.

Chestnut kernel rot is an anthrax disease of chestnut trees. If you want to prevent and control, first of all, you must choose the soil is more fertile and wide land when planting, and in the process of fertilization, you must use farmhouse fertilizer, do not use fertilizer bought outside, and often water the plants, and also prevent the occurrence of pests and diseases.

This disease is a knife brown rot. There are many ways to control it, and it can take physical, biological and chemical control. You can also cultivate more cold-resistant high-quality seeds, and you can also strengthen the management of fertilizer and water.

It is a disease that can reduce plant yields, and it is very serious. When planting chestnuts, spray some pesticides on chestnuts first, and then spray pesticides on time according to the growth cycle of chestnuts.

Summary. Hello dear ! Chestnut kernel rot is a disease called internal rot.

The symptoms of this disease are different from those of anthracis and sickle brown rot, and this type of chestnut disease has become common in recent years. Generally, fungicides such as benzomyl and thiophanate-methyl are sprayed to a certain extent. The control effect of spraying San'an plant protection agent is good.

What is chestnut kernel rot? How to prevent it?

Hello dear ! Chestnut kernel rot is a disease called internal rot. The symptoms of this disease are different from those of anthracis and sickle brown rot, and this type of chestnut disease has become common in recent years.

Generally, fungicides such as benzomyl and thiophanate-methyl are sprayed to a certain extent. The control effect of spraying San'an plant protection agent is good.

Internal rot is divided into several types, 1. Black spot type. The appearance of chestnut seed coat is basically normal, and the surface of chestnut kernel produces irregularly shaped black-brown to gray-black lesions, which are deep into the kernel, and there are gray-white to red-black striped cavities on the lesion profile. 2. Brown spot type.

There are brown necrotic pits of different shades on the surface of the kernel, which are deep into the inside of the kernel, and the kernel profile is white, light brown, yellowish-brown, and there are gray-white to gray-black striped cavities inside. 3. Soft rot type. There are round lesions on the appearance of chestnut seed coats, and round brown to black soft rot spots on the inner kernels, and chestnut kernels in the diseased area become paste-like, and in severe cases, the whole chestnut kernel becomes paste-like rotten fruit.

At the same time, it is necessary to strengthen the management of the orchard, prune reasonably, and keep the orchard well ventilated and transmitted. Drain water in time after rain to prevent moisture from being trapped in the orchard, pay attention to ventilation, etc.

When planting, you must choose fertile, and then when planting, the seeds and soil must be sterilized first, so that it will be conducive to the growth of chestnuts. Then during planting, you should also water more water, add more phosphorus fertilizer, so that it will be conducive to its growth, and then during planting, we should also do a good job of weed treatment in the field, which can reduce the invasion of pests and diseases.

First of all, you can loosen the soil, prepare for drainage, you can also prune the branches, so that the plants can better ventilate and dissipate heat, and also prepare some special pesticides, so that you can kill some pests and diseases and reduce this situation.

In such a situation, try to use more antibacterial and insect control agents, and it should be reasonable in the later stage**, and we should also dissolve the rotten juice.

Chestnuts can be disinfected and sterilized when planting chestnuts, and the growth temperature of chestnuts should be strictly controlled, and chestnuts should be fertilized frequently, and the fruit growth and health of chestnuts should be ensured in the process of planting, so as to prevent some chestnut kernel rot.

This is a fungal infection caused by a fungal infection, usually through the decay of the epidermis of the trunk, which eventually causes the fungus to enter and cause changes.

It is anthracnose, a pest and disease that has a very large impact, and it also greatly affects the yield, causing very serious consequences.

Spot disease is very likely to suffer from this disease, be sure to pay attention to the condition of the plant, otherwise it is easy to cause problems with other indices.

The branches of chestnut trees infected with root rot grow slowly and die in severe cases. The growth of the leaves is stunted, yellow, brittle, thin, and even yellowing and early falling. The growth of male and female flowers or spines is stunted due to malnutrition, and they tend to turn yellow and fall off in the later stage, resulting in reduced yield.

3 Partial branch death or whole plant death within 5 years.

Registration certificate number: Microbial Fertilizer (2018) No. 6221.

Standard certificate number. gb20287-2010

The general name of the product. Microbiological agents.

Technical indicators: the number of viable bacteria is greater than or equal to 1 billion ml.

Ways to solve chestnut root rot.

Strengthen field management: remove diseased plants, leaves, roots and weeds in a timely manner, and burn them together. Reasonable dense planting to control the light transmittance in the field.

Strengthen water and fertilizer management to make seedlings strong and disease-resistant. In addition to the application of plantar fertilizer, the resistance of plants should also be improved by spraying foliar fertilizers such as polypeptidase, multi-element, and leaf roots.

It is found that dead seedlings rot root disease is recommended usage and dosage. + Root protection seedling (cattle) tree + + Changxiao Lingzao microbial FSH + 40100 kg of root and seedling immunizer mixed with water to spray downward conduction on the leaf surface, the front and back are the same as fine spraying, dead seedlings and rotten roots can be supplemented with root treatment, can also be seriously ill, according to the condition can be increased dosage. After 3 days, the microbial soil cell agent was sprayed, irrigated, drip irrigated or sprinkled to condition the soil, enhance soil permeability, change the surrounding environment of the root system, take root and strengthen the seedlings, and improve the root immunity.

AIDS grows in the roots.

Disease control is very important for friends in the planting industry. We can refer to the above methods, or we can formulate appropriate and reasonable disease prevention and control methods according to the actual situation of our own planting. If the above methods are not suitable for your situation, and you do not have a good method, it is recommended that you contact us in time according to your situation to formulate a reasonable prevention and control plan.

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The first is topdressing to enhance plant resistance, the second is irrigation to avoid the serious impact of drought on crops, and the third is weeding to increase ground temperature and promote plant growth.

First of all, the roots should be dug out in the early stage of the disease and treated with drugs**, and then foliar spraying** should be carried out on larger trees, and the leaves should be pruned in a timely manner.

The first is top dressing, regular weeding, raising ground temperature, timely removal of diseased leaves, diseased roots, burn together, and strengthen water and fertilizer management.

First of all, the roots should be dug out and treated with medicine in the early stage of development, and then foliar spraying should be performed on larger trees, and the leaves should be pruned as appropriate.

Chestnut rot disease is often produced, according to everyone's planting experience, it is generally nothing more than: poor soil layer structure, chestnut tree weakness, shallow roots, fruit tree pruning or large crown diameter disease is more serious. In particular, the small seedlings of the new grafting method, the extensive management method chestnut orchard, once the outbreak produces a joint piece, it will lead to a greater difficulty coefficient of management methods for everyone, and the situation is serious It is very likely to destroy the chestnut orchard, resulting in greater damage, which is one of the key problems to be solved in the planting of chestnut trees.

From the other name of this type of disease, you can feel its lethality - chestnut plague.

There is a certain transmissibility. Therefore, we should attach great importance to planting households, understand the ins and outs of this disease, do a good job in preventing it, and reduce the difficulty coefficient of unnecessary management methods. Rotten pathogenic bacteria impregnated chestnuts, leaves, branches, and fruits.

After the leaf is damaged, annular or irregularly shaped lesions appear, which are dark brown, and there will be black spots on the edge of the lesions in the middle and late stages, that is, the conidia disc of the pathogen, and the middle is grayish-white. After the branch is damaged, the gray-black lesions are round and smooth, and they are sunken and rotten after lack of water, and they are easy to be broken by the wind, and they will slowly wither at the end stage. The diseased part of the damaged bud is dark brown and rotten.

Most of the fruit damage occurs gradually from the top, and at first there are ring-shaped dark brown lesions, and the fruit is dry and wrinkled. Chestnut rot disease has a direct impact on the natural environment of planting, such as we plant in areas with fertile and thick soil, rot disease will appear very little, or it is impossible to produce, and planted in a relatively thin soil layer or excessively poor area, because the tree is weak and shallow, it is very easy to breed this kind of rot disease, and it is very easy to produce rot disease in areas with high altitude, thick permafrost and very large temperature difference in early spring.

Chestnut tree rot disease damages chestnut tree branches. In the early stage of the disease, the lesions on the branches are dark brown, slightly protruding, water-like, the disease organs are dark brown and rotten, and dark brown sap is often discharged. In the middle and late stages, the lesions are shrunken and dented, and the upper side is densely covered with orange-yellow hard granules, which are the conidia of pathogenic bacteria.

After rain or when the gas is wet and cold, tendril-shaped yellowish conidia horns emerge. Autumn causes dark brown hard grains in the diseased area, which are the subplots of pathogenic bacteria. The branches are diseased, the lesions are brown and black, the expansion is rapid, and the branches are blighted.

In the middle and late stages of the diseased department, gray-black hard granules are caused, which are the conidia of pathogenic bacteria.

Strengthen the management of soil, fertilizer and water, increase the application of fully decomposed organic fertilizers, and use nitrogen, phosphorus and potassium fertilizers organically. Continuously improve the soil, fertilize the soil, enhance the tree strength, and improve the disease resistance.

In the process of planting chestnut trees, it is necessary to strengthen field management, but also pay attention to plant spacing, soil management should be strengthened in the rainy season, and attention should be paid to dredging water sources.

It is necessary to sterilize and disinfect in time, use chemicals, and strengthen ventilation to ensure the permeability of the soil.