{Olea europaea}

Boron Deficiency in Olive

Boron deficiency induces a characteristic leaf fall and branch dieback in the upper parts of the tree. Secondary shoots develop at the base of the dieback and the number of suckers in the lower part of the trunk increases. The leaves show a distinct apical browning which can extend up to two-thirds of the leaf while the rest of the leaf remains a normal green color. Subsequently, the leaves may become completely yellow and later turn a leathery brown from the apex. In cases of mild boron deficiency, a few fruit may ripen normally but most will drop prematurely or become deformed and corky. As the deficiency becomes more severe, the tree will become increasingly less productive and may ultimately die.

Soil Application (Suggested rates of application)

  Granubor 2 Fertibor
LBS./ACRE 13-35 13-35
KG/HA 14.63 - 39.38 14.63 - 39.38

Foliar Application (Suggested rates of application)

LBS./ACRE 4-13
KG/HA 4.5 - 14.625

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