What is the role of magnesium in apple production?
Magnesium effect at growth stages
Stage | Magnesium effect |
Bud Burst – Start of Flowering | Promote strong early growth of new plant tissues and maximum tree productivity |
Fruit Set to Fruitlet at 30mm | For reduced fruit drop |
Post Harvest | Replenish reserves and strengthen new buds |
Magnesium deficiencies in apples
Interveinal chlorosis and bright yellowing develops first on older leaf margins and tip and spreads back to the main vein. The leaves often have a characteristic herringbone pattern of chlorosis on new year’s growth. Symptoms are normally most obvious later in the season during fruit fill.
In severe instances, leaves curl up, die and drop prematurely, leaving a few tufted leaves at the tip of the branches.
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