Sulphur deficiency | Apples

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Nutrients

Apples - Chlorosis

Symptoms
Leaf growth is reduced and leaves are pale green / yellow in colour. Chlorotic leaves eventually develop necrotic blotches near the margin. Symptoms start at younger leaves.

Reasons
Sulphur deficiency Nitrogen deficiency can produce similar symptoms but starts at older leaves.

Sulphur deficiency made worse by

Acidic soils
Light, sandy soils (leaching)
Low organic matter
Poorly aerated soils (waterlogged soils
) Areas with low industrial emissions

Sulphur is important for

New growth healthy and green
Fruit number and size increased
Overall yield is greater

Yara recommended fertilizers for Sulphur

YaraVita THIOTRAC 300

Apple: 3 to 5 l/ha before the start of flowering. Repeat at fruit set and 10 to 14 days later if necessary or after harvest before leaf fall. Water rate: 500 to 1000 l/ha. WARNING Do not apply during flowering. This product contains an active ingredient which, when used at rates around 15 l/ha, has been found to cause fruit thinning. These rates may also cause leaf scorch and Yara does not warrant this application.