No Mineral deficiency

Stages in development of natural autumn tints.

Stages in development of natural autumn tints.

Nitrogen deficiency

Small; pronounced yellow and red tints.

Phosphorus deficiency

Small; dull purple and bronze tints.

Magnesium deficiency

Severe defoliation of terminal shoots progressing from base to tip.

Magnesium deficiency

Variety, Lane's Prince Albert. Intervenal chlorosis and necrosis.

Magnesium deficiency

Variety, Cox Orange Pippin. Central intervenal necrosis.

Magnesium deficiency

Purple tinting and intervenal necrosis developing from marginal areas.

Potassium deficiency

Bluish green, with slight marginal and intervenal chlorosis, followed by marginal scorching, either brown or grayish brown color.

Iron deficiency

Tip leaves chlorotic; small veins show as fine network in early stages; margins develop brown patches. (cf. Plate No. 282, and Plate No. 282, manganese deficiency)

Manganese deficiency

Variety, Early Victoria. Leaves severe chlorosis over most of tree; young leaves of terminal shoots not as severely affected as older leaves.

Manganese deficiency

Leaves intervenal chlorosis progressing from margins towards midrib.

Zinc deficiency

Center: healthy shoot from zinc deficient tree; Left and Right: shoots showing zinc deficiency symptoms; buds along shoots fail to develop, leaves small and narrow ("Little Leaf" condition) and tend to form rosettes at tips of shoots.