Nutrients

P Phosphorus
K Potassium
Mg Magnesium
Ca Calcium
S Sulfur
B Boron
Fe Iron
Mn Manganese
Zn Zinc
Previous Next

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

YaraVita® MANTRAC™PRO

Apples: 1 pint/acre prior to flowering in the case of severe deficiency. Otherwise commence at petal fall and repeat 10 to 14 days later. On russet sensitive varieties delay applications until 6 weeks after petal fall. Water rate: 50 to 100 gallons/acre. For improved green background colour (note specified varieties only): 6 applications of 0.25 pint/acre from June drop to around 4 weeks pre-harvest. Also, 1 pint/acre after harvest before leaf senescence. Applies to varieties: Jonagold, Elstar, Cox, Golden Delicious and Granny Smith. Water rate: 30 gallons/acre.

Read more about YaraVita® MANTRAC™PRO

NUTRA-PHOS ZMP

NUTRA-PHOS ZMP

Apple: 5 to 25 lb per acre per application in pre- and post-bloom sprays. Repeat as needed. 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.

Read more about NUTRA-PHOS ZMP

NUTRA-SPRAY MANZINC

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.

Read more about NUTRA-SPRAY MANZINC

NUTRA-SPRAY ZM

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.

Read more about NUTRA-SPRAY ZM