Many summer residents interested in the question, why shrink sleeve grape. Multi-stemmed vine may die for many reasons. Winegrowers pay attention to the sleeves eutipoz and mechanical damage to the vines.
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The causes of death of the vine
An experienced gardener once remarked that a single multi-lateral vine withers. He knows several possible causes of this phenomenon.
Vine damaged mechanically. In the process of hiding the vines in winter may cause small cracks to 2-3 sleeves. The damaged areas penetrate pathogenic pests and their toxins affect the vital functions in the tissues of the vine.
Many gardeners use the term "slaughtered his shoulder." In the process of multi-lateral vine pruning inept dies, ie. K. Violated conductive tissue function.
Experienced gardeners know that just should remove unnecessary shoots, leaving a small growth of 1 cm. He slowly dries up, and his cut is completely dried up, so the vines tissue remain intact.
"Stabbed the vine" - a tree stump, which is completely rotten inside. Vines have one feature - they are not able to delay the wound crust, as do trees. Sometimes a damaged hose wrapped with film material in the hope that the wound is covered with calluses.
Often heal damage is not possible. When the formation of many arms vine vines mechanical injuries occur frequently. Tampering may occur at the long sleeve grown sheeted on a trellis. Premature aging caused by the death of vines core, the kidneys do not bloom if going to rise, then they are weak, so these vines are removed.
On the vine inside - a lot of dry wood, there is no power supply from the bush, there are traces of mottled necrosis.
Infectious diseases sleeves
Sometimes, multi-lateral vine dies as a result of infection of an infectious disease of the bush. The process can destroy not only the grape sleeve, but the whole plant. Black rot causes crop damage in 80% of cases, completely destroying the berries. They turn brown, wet, covered with a black coating. The disease is the result of mechanical damage to the fruit, located on grape sleeve, due to inclement weather, insects and exposure to high temperatures.
Black cancer - a dangerous disease that affects the vines. In the early stages of infection does not appear, therefore, spreads rapidly, if the owner begins to instill cuttings of grapes. Diseased plants produce weak shoots, the vine suffers, there is a reduction of the distance between nodes.
Change the appearance of the bushes: the leaves are small, they do not shine, covered with a dull patina. Once the temperature exceeds +25... + 28˚S, berries become dark, there are numerous defects. Many shoots dry, sometimes the whole vine dies.
In winter, the virus is in a multilateral vine, active against all sorts of plants. Winegrowers use a proven way to combat the pathogen of black cancer: remove damaged shrinks the sleeve, and then burn them outside the location of the vineyard area.
To prevent yield loss, it is necessary to take preventive measures: timely watering, fertilizing in a timely manner, spraying the plants with a solution of 1% Bordeaux mixture.
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