Phosphorus deficiency-Tomato

Symptoms
Phosphorus deficiency causes small and rigid leaves, the plant habitus is very erect. Growth is sparse, thus the plant shows a spindly appearence. Total height is almost normal. The bottom leaves show interveinal chloroses and necrotic leaflets.

Reasons
Phosphorus deficiency. Deficiency symptoms can also be found when soil P content is sufficient, but the tomato plants are grown at too low temperatures since phosphorus uptake is inhibited under these conditions.

Symptoms
Beginning from the margin, the surface or undersurface of older leaves becomes dark green or purplish red at severe phosphorus deficiency.

Reasons
Phosphorus deficiency on the leaf. Deficiency symptoms can also be found when soil P content is sufficient, but the tomato plants are grown at too low temperatures since phosphorus uptake is inhibited under these conditions.

Symptoms
In some cultivars, the phosphorus deficiency appears as small brown dots which develop interveinally on the lower leaves. Additionally, starting from the leaf margin, chlorotic and subsequently necrotic areas progress. The necroses may have a brown or a dull, dark olive, colour.

Reasons
Phosphorus deficiency on the leaf. Deficiency symptoms can also be found when soil P content is sufficient, but the tomato plants are grown at too low temperatures since phosphorus uptake is inhibited under these conditions.