Definition - What does Vine Disorder mean?
Vine disorders are problems which arise when vines show functional problems, both physically and/or physiologically. These disorders may occur due to certain elements in the vines' environment, genetic predispositions or by improper vine management. Many of these disorders are preventable and reversible with the right steps. They are also relatively easy to recognize.
WineFrog explains Vine Disorder
Vine disorders should not be confused with vine diseases.
Disorders of grape vines are identifiable with the right knowledge. They are side-effects which occur due to imbalance in their environment.
- Shanking - can be seen when some grapes in a bunch do not color properly. They will lose their flavor and wrinkle. This can occur when vines are grown under cover and have been watered too little or too much or if excess buds were left on the plant to overwinter.
- Weedkiller damage - is recognized by distorted and twisted growth. The affected growth should be removed.
- Magnesium deficiency - will show yellow leaves between the veins, which later turn brown. This is solved by using a special spray containing Epsom salts and water.
- Oedema - effects vines which are grown under cover. Raised growths will appear underneath the leaves. These growths are waterlogged cells in the leaf. It occurs when the foliage takes up too much water than it can lose in transpiration. This can happen with overwatering and high humidity.