Expert organization in plant nutrition
Expert organization in plant nutrition
Aquaculture Pests Diseases Flowers Products Deficiencies Subject


Boron deficiency in pears and apples causes similar damages.

The flower suddenly fades as if it is damaged by the cold and becomes black brown.

But they do not fall as they stand on the branch for a while. Although frost damages create the same appearance, flowers affected by frost are immediately shed.

In case of severe deficiency, leaf output is delayed. Vegetative growth points die, shoots become short, leaves are small and distorted shape.

However, chlorosis is not seen in the leaves. Apple and pear fruits suffer from major deformations and fungus inside and outside. Fruits are smaller than normal and sometimes crack.

External fungus caused by boron deficiency should not be confused with bitter speckle disease caused by calcium deficiency. Bitter spots appear on the branch either too late, or more often after harvest, during storage.

A typical symptom of zinc deficiency in pears and apples is the formation of shrunken, shrunken leaves and rosettes.

The reason for this measurement is that the lengths of the nodes are considerably shortened. Leaf edges sometimes become wavy.

Yellow leaf mosaic stains occur between the veins, with the vascular edges of the leaf surface remaining green.

If deficiency is not too severe, yellow mosaic stains occur.

If deficiency is not too severe only affects the leaves, shoot development continues normally.

However, if deficiency is severe, shoot development stops completely.

The number of fruit buds in shoots decreases or disappears completely.

Blackening is seen in the fruit meats of stone fruits.

According to the variety of apple trees, zinc deficiencies show great differences between them in terms of sensitivity.