Magnesium deficiency starts on older leaves. They show interveinal chlorosis on the leaf margins and some whitish to light brown necrotic dots. If deficiency is severe, interveinal chlorosis progresses from the margins to the middle of the leaflets. The small veins also become chlorotic, but the bigger veins remain dark green first. Subsequently the whole leaves are yellowing and finally the older leaves die. In this case growth is severely impaired and fruit yield is reduced.