Magnesium deficiency

Strong central purpling with narrow green marginal band.

Potassium deficiency

Leaves brown marginal scorch and slight intervenal chlorosis, which follow purple tinting of marginal areas.

Iron Deficiency

Terminal leaves strongly chlorotic. (cf. Plate No. 299, manganese deficiency)

Manganese deficiency

Somewhat faint intervenal chlorosis as well defined pattern. (cf. Plate No. 298, iron deficiency)

Potassium deficiency

Dark brown marginal leaf scorch with forward curling of margins and some intervenal chlorosis. (cf. Plate No. 301, chloride injury)

Chloride injury

Bright reddish brown marginal scorch. (cf. Plate No. 300, potassium deficiency)

Phosphorus deficiency

Leaves dull purple tints becoming red later.

Magnesium deficiency

Leaves broad red marginal bands which fade to cream color.

Magnesium deficiency

Broad red marginal bands, later fading to cream.

Potassium deficiency

Bluish green color, margins generally curled backward; develop purple tints followed by grayish brown marginal scorch; purpling disappears as scorching develops.

Potassium deficiency

Marginal leaf scorch and intervenal browning; leaves tend to curl backward towards under surfaces, but scorched margins turn forward.

Iron deficiency

Terminal leaves severe chlorosis followed by marginal and intervenal necrosis. (cf. Plate No. 308, manganese deficiency)

Manganese deficiency

Leaves intervenal chlorosis beginning near margins and progressing towards midribs as well defined pattern; terminal leaves green or less chlorotic than older leaves, in contrast to iron deficiency. (cf. Plate No. 307, iron deficiency)

Iron deficiency

Leaves severe chlorosis; green network of fine veins distinct in early stages. (cf. Plate No. 310, manganese deficiency)

Manganese deficiency

Somewhat faint intervenal chlorosis beginning at margins and progressing towards midrib; where severe, chlorotic areas yellowish appearance. (cf. Plate No. 309, iron deficiency)

Magnesium deficiency

Varity, Muscat of Alexandria (green fruited variety). Central or marginal intervenal chlorosis followed by intervenal necrosis.

Magnesium deficiency

Varity, Gros Colmar (black fruited variety). Strong intervenal purpling fading to red, and intervenal necrosis.