Grape diseases: description, photos, treatment methods

Knowing grapevine diseases, descriptions with photos, and treatment methods can help you save your grapevine and the harvest it produces. After all, grapes are a plant that has long been a companion to humans, and despite being low-maintenance, they still need help in times of need.

Downy mildew or false powdery mildew

One of the most common grape diseases, a description and photos of which are essential for anyone with a beautiful grapevine. The disease is a fungus, so it reproduces by spores. The fungus is frost-resistant and winter-resistant, quietly "hiding" in fallen leaves or mulch until spring. With the arrival of spring, when humidity increases, the fungus begins to multiply, posing a potential threat to the grapes.

You can visually identify the enemy by closely examining the grape leaves: yellow spots can be seen on the affected areas of the leaf blade, and on the underside of the leaf, these spots will also be covered with a fluffy fungus. As the disease progresses, holes form at the site of the spots. The disease also spreads to the berries, where a white fungal coating forms; these berries are completely unfit for consumption.

To prevent this, you need to know not only descriptions of grape diseases with photos but also treatment methods. Mildew can be combated by treating grapes with products such as Ditan M-24, Acidan, Acrobat MC, and Cikhon, which contains copper oxide and chlorine.

For preventative purposes, it's also appropriate to use the trusty Bordeaux mixture. We also recommend regularly using a plant growth activator, which not only increases yield but also prevents the development of pathogenic flora.

Grape mite

Visually, this disease resembles mildew, but there's one important detail that can help avoid confusion. When grapes are attacked by the mite, raised spots form on the foliage, while with mildew, the spots are covered in a fluffy texture.

Initially, only the lower leaves of the plant are affected, and to prevent the disease from progressing upward, it must be detected and addressed promptly. If the disease is not stopped in time, the lesions on the foliage will turn pink or red. The mite is especially active in hot weather, and can then attack the berries, which become covered in a felt-like texture.

In the fight against grape mites, such preparations as "Bi 58", "Aktara", "Karate Zeon" are helpful.

Powdery mildew or powdery mildew

With this disease, the grape leaves and berries look as if they've been thoroughly dusted with flour. The most favorable conditions for the fungus to thrive are moderate weather; in hot weather, it's inactive and often bypasses the plant. If Oidium reaches the berries, they begin to crack and the seeds fall out.

It is important to carry out not only treatment for this disease, but also preventive measures using the drugs "Topaz", "Skor", "Bayleton".

Alternaria

With this disease, the plant's leaves and shoots become covered with silver-like spots. During damp periods, the spots may turn dark brown.

Effective drugs for this disease include those containing copper: Skor, Cabrio-Top, and RapidGold.

Anthracnose

The first warning sign of the disease is the appearance of small brown spots on young leaves, surrounded by a black border. Because the spots resemble a bird's eye, the disease is commonly called "bird's eye." The disease also affects the plant's fruits, which become covered with similar spots and then crack.

As soon as the first signs of grape disease are noticed, as described and accompanied by photographs, it is necessary to begin applying treatment methods, otherwise the entire crop will be lost.

Any of the following medications can help defeat the enemy: "Skor," "Acrobat," and "Radomil." Treatment is carried out once every two weeks until there are no traces of the disease left.

Bacterial cancer

This is a bacterial disease; bacteria penetrate the tree's bark and thrive there. The bark begins to literally "burst at the seams." This disease is very serious and dangerous because there are currently no guaranteed treatments. It is recommended to first try treating the plant with oxytetracycline, but this rarely helps. If there is no visible improvement, then, unfortunately, the vine must be destroyed.

Where grapevines previously grew infected with bacterial canker, no further planting should be permitted for another four years. Continuous quarantine measures must be carried out in this area.

Gray rot

By looking at descriptions of grape diseases with photographs, you can accurately diagnose "gray mold." Gray mold affects both berries and other parts of the plant, and this disease truly looks like rot—slippery and disgusting.

Curing grapes of gray mold is difficult, but you can try using the medications "Euparen" and "Fundazol." Even if they don't eliminate the gray mold completely, they will help improve the situation.

White rot

A disease that becomes active towards the end of the summer season. It attacks berries, causing them to look as if they've been dipped in a pot of boiling water. The fungal infection spreads at breakneck speed, so treatments such as Colfugo and Fundazol should be used immediately.

When helping your grapevine cope with diseases, it's important to remember that only timely measures can save both the harvest and the entire plant. Compliance with all agricultural practices is also key to the full and healthy development of grapes. proper methods of caring for grapes.