Phosphorus Deficiency in Canola

Symptoms
Older leaves show a distinct reddish/purple discoloration along the marginal area. The entire leaf blade including the veins shows a reddish tint.

Reasons
Phosphorus deficiency.

Canola - Discolouration

Symptoms
Older leaves show a distinct reddish/purple discoloration along the marginal area. The entire leaf blades including the veins show a reddish tint, as well as the leaf stalks.

Reasons
Phosphorus deficiency.

Phosphorus deficiency made worse by

Acidic or very alkaline (calcareaus) soils
Low organic matter
Cold or wet conditions
Crops with a poorly developed root system
Soils with low P reserves
Soils with a high phosphate capacity
Iron rich soils

Phosphorus is important for

Improved crop establishment
Improved winter hardiness
Improved yield

Yara recommended fertilizers for Phosphorus

YaraVita® HYDROPHOS™

Canola: For a single application, 3 to 5 l/ha at onset of stem extension. For moderate deficiency, 3 to 5 l/ha at 4 to 6 leaf stage and at onset of stem extension. An extra application can be made 10 to 14 days later for severe deficiency. Avoid flowering. Water rate: 30 to 200 l/ha. Colza: Dans le cas d'une seule application, 3 à 5 l/ha au stade début floraison. En cas de carence moyenne, 3 à 5 l/ha au stade 4-6 feuilles et 3 à 5 l/ha au début montaison. Une application supplémentaire peut être effectuée 10-14 jours plus tard en cas de carence sévère. Éviter la floraison Volume d'eau: 30 à 200 l/ha.