Boron deficiency in Apples

Symptomen
Terminal buds die off. The youngest leaves first turn slightly chlorotic, then margins become scorched and roll inwards.

Redenen
Boron deficiency

Symptomen
Fruits show corking disorders and are often small and deformed.

Redenen
Boron deficiency Symptoms can be confused with calcium deficiency. But boron deficiency causes symptoms in early state of fruit development, while calcium deficiency gives symptoms a few weeks before harvesting or in store.

Symptomen
Fruits are small and deformed and necrotic with sunken areas which give a dimpled appearance

Redenen
Severe boron deficiency Symptoms can be confused with apple scab (caused by Venturia inaequalis)

Symptomen
Fruits with boron deficiency (left hand side) compared with healthy fruits. Fruits show corking disorders and some are small and deformed.

Redenen
Boron deficiency Symptoms can be confused with calcium deficiency. But boron deficiency causes symptoms in early state of fruit development, while calcium deficiency gives symptomes a few weeks before harvesting or in store.

Symptomen
Surface of fruits shows corky areas and cracks. Fruits are often small and deformed.

Redenen
Severe boron deficiency Symptoms can be confused with apple scrap (caused by Venturia inaequalis)

Symptomen
Corky spots appear on the bark of lateral shoots.

Redenen
Boron deficiency

Symptomen
Surface of fruits shows corky areas and cracks. Fruits are often small and deformed.

Redenen
Severe boron deficiency Symptoms can be confused with apple scrap (caused by Venturia inaequalis)