Nutrients

N Nitrogen
P Phosphorus
K Potassium
Mg Magnesium
Ca Calcium
S Sulfur
B Boron
Cu Copper
Fe Iron
Mn Manganese
Mo Molybdenum
Zn Zinc

Lettuce - Necrosis

Symptoms
Symptoms of zinc deficiency on lettuce start on older or medium leaves. They develop papery, grey-green necrosic spots with brown borders on leaf margins. Necrotic areas increase quickly and flow together. Leaf parts which are not subjected to light remain green. Growth is restricted. Zinc deficiency in an early stage of development causes rosetting, no heads are formed.

Reasons
Zinc deficiency on leaves compared to optimum supply

Lettuce - Growth retardation

Symptoms
Symptoms of zinc deficiency on lettuce start on leaf margins of older or medium leaves. They develop papery, grey-green necrotic spots with brown borders, mostly without preceding chlorosis. Necrotic areas increase quickly and flow together. Leaf parts which are not subjected to light, remain green. Growth is restricted. Zinc deficiency in an early stage of development causes rosetting, no heads are formed.

Reasons
Zinc deficiency. Generally the leaves are smaller with Zn deficiency, and the plants are stunted in growth.

Lettuce - Growth retardation

Symptoms
Symptoms of zinc deficiency on lettuce start on leaf margins of older or medium leaves. They develop papery, grey-green necrotic spots with brown borders, mostly without preceding chlorosis. Necrotic areas increase quickly and flow together. Leaf parts which are not subjected to light, remain green. Growth is restricted. Zinc deficiency in an early stage of development causes rosetting, no heads are formed.

Reasons
Zinc deficiency. Generally the leaves are smaller with Zn deficiency, and the plants are stunted in growth.

Lettuce - Growth retardation

Symptoms
Symptoms of zinc deficiency on lettuce start on leaf margins of older or medium leaves. They develop papery, grey-green necrotic spots with brown borders, mostly without preceding chlorosis. Necrotic areas increase quickly and flow together. Leaf parts which are not subjected to light, remain green. Growth is restricted. Zinc deficiency in an early stage of development causes rosetting, no heads are formed. Growth of roots is slightly restricted.

Reasons
Zinc deficiency on leaves and roots

Lettuce - Chlorosis

Symptoms
Symptoms of zinc deficiency on lettuce start near leaf margins of older or medium leaves. They develop papery, grey-green necrotic spots with brown borders, mostly without preceding chlorosis. Necrotic areas increase quickly and flow together. Leaf parts which are not subjected to light, remain green.

Reasons
Commencing zinc deficiency on leaves

Zinc deficiency vs. optimum made worse by

  • Organic soils
  • High pH soils
  • Soils rich in phosphorus
  • Soils receiving high phosphorus application
  • Cold wet conditions

Zinc is important for

  • Enzyme activation, but also for synthesis of growth regulators

Yara recommended fertilizers for Zinc

YaraVita® MANCOZIN™

YaraVita® MANCOZIN™

Lettuce (field grown): 1 pint/acre at the 4 to 6 leaf stage. Water rate: 20 gallons/acre.

Read more about YaraVita® MANCOZIN™

YaraVita® PHOZTRAC™

YaraVita® PHOZTRAC™

Lettuce (field grown): 1 to 2 quarts/acre applied 2 or 3 times commencing 10 to 14 days after transplanting or emergence with 7 to 10 day intervals between applications. Water rate: 3 to 50 gallons/acre.

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YaraVita® ZINTRAC™

YaraVita® ZINTRAC™

Lettuce (field grown): 1 pint/acre when crop is 6 inches tall. Repeat application at 10-14 day intervals if necessary. Water rate: 3 to 20 gallons/acre.

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NUTRA-PHOS CALZINC

NUTRA-PHOS CALZINC

Lettuce (field grown): 2 to 10 lb. per acre per application. Make several applications at intervals of 2 to 3 weeks starting at thinning period. 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.

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NUTRA-PHOS Zn-K PLUS

NUTRA-PHOS Zn-K PLUS

Lettuce (field grown): 2 to 10 lb. per acre per application. Make several applications at intervals of 2 to 3 weeks starting at thinning period. 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.

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NUTRA-SPRAY MANZINC

NUTRA-SPRAY MANZINC

Lettuce (field grown): 3 to 5 lb. per acre per application. 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.

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NUTRA-SPRAY ZM

NUTRA-SPRAY ZM

Lettuce (field grown): 3 to 5 lb. per acre per application. 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-SPRAY ZM