Manganese deficiency-Apples | Yara New Zealand

Change crop

Nutrients

Apples - Chlorosis

Symptoms
Symptoms start at young, fully developed and medium leaves. They show yellow green or yellow interveinal chlorosis. Veins and streaks along the veins remain green. Sometimes leaves look like a mosaic, because also fine veins remain green. Later necrotic spots, sometimes white in colour, and necrotic blotches appear.

Reasons
Manganese deficiency

Apples - Chlorosis

Symptoms
Symptoms start at young, fully developed and medium leaves. They show yellow green or yellow interveinal chlorosis. Veins and adjacent tissue remain green. Sometimes leaves look like a mosaic, because also fine veins remain green. Later necrotic spots, sometimes white in colour, and necrotic blotches appear.

Reasons
Manganese deficiency

Manganese deficiency made worse by

Organic soils
Sandy soils
High pH
Cold wet periods
Fluffy soils

Manganese is important for

Vigorous shoot and leaf growth
Fruit quality and yield may be improved

Yara recommended fertilizers for Manganese

YaraVita MANTRAC PRO

Apple: 1 to 1.5l/ha prior to flowering in the case of severe deficiency. Otherwise commence applications 4 weeks after petal fall and repeat 10 to 14 days later. Also, 1 to 1.5 l/ha after harvest before leaf senescence. Water rate: 500-1000 l/ha. For improved green background colour with the variety Granny Smith only: 6 applications of 0.75 l/ha from December drop to around 4 weeks pre-harvest. Water rate: 200 l/ha.