Wine Grape
- Apples
- Apricot
- Banana
- Barley
- Beans
- Broccoli
- Cabbage
- Cherries
- Citrus
- Lettuce
- Maize
- Oilseed Rape
- Onions
- Peach
- Plums
- Potatoes
- Raspberries
- Soybean
- Strawberries
- Table Grape
- Tomato
- Wheat
- Wine Grape
Wine Grape - Necrosis
Symptoms
With severe magnesium deficiency the leaf margins show necrosis, dry and drop off prematurely. Especially older leaves are concerned.
Reasons
Magnesium deficiency
High applications of K or ammonium can induce Mg deficiency symptoms even on soils that contain enough Mg.
Magnesium deficiency made worse by
- Sandy soils
- Acidic soils
- Potassium rich soils
- Soils receiving high potash applications
- Cold wet periods
Magnesium is important for
- Combats chlorosis giving healthier greener foliage
- Increases alcohol content in berries
- Increases sugar levels in berries
- Prevents and controls grape stem necrosis