Manganese deficiency-Apples | Yara United States

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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

NUTRA-SPRAY MANZINC

Apple: 10 to 30 lb per acre per application at pre-bloom and post-harvest. Apply foliar sprays as needed. In horticultural oil sprays, 3/4 to 1 lb. may be included for each 1% of oil emulsion. Apply aerial applications in at least 5 gallons/acre and ground applications in at least 10 gallons/acre; however, when total application gallonage is 25 gallons per acre or less, DO NOT mix more than 1 lb. of this product per gallon of water.

NUTRA-SPRAY ZM

Apple: 10 to 30 lb per acre per application at pre-bloom and post-harvest. Apply foliar sprays as needed. In horticultural oil sprays, 3/4 to 1 lb. (0.3 to 0.5 kg) may be included for each 1% of oil emulsion. Apply aerial applications in at least 5 gallons/acre and ground applications in at least 10 gallons/acre; however, when total application gallonage is 25 gallons per acre or less, DO NOT mix more than 1 lb. of this product per gallon of water.