Blueberry

Boron deficiency in blueberries

Similar boron deficiency symptoms have been described for both V. corymbosum (highbush blueberry) and V. angustifolium (lowbush blueberry). The first sign is the development of small necrotic lesions associated with the veins of the youngest unexpanded leaves. The lesions merge, causing the leaf to curl backwards. This is followed by terminal dieback and new shoot development. Leaf fall is likely and the remaining lower leaves become dark blue-green. Internodes are short.