Mo deficiency in Caryopteris

Mo deficiency in Caryopteris

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Scientific Name
Molybdenum (Mo)
Atomic Number
42
Atomic Weight u
95.95
Elemental Group
Micro elements (B, Cl, Cu, Fe, Mn, Mo, Ni, Zn) | Micronutrients
Available Forms

Available forms of Molybdenum (Mo) for use in Container Nursery Stock

  • Ammonium molybdate ((NHâ‚„)₆Mo₇O₂₄·4Hâ‚‚O) – highly soluble, commonly used in fertigation or foliar sprays.
  • Sodium molybdate (Naâ‚‚MoO₄·2Hâ‚‚O) – soluble, quick correction via substrate or foliar application.
  • Molybdenum trioxide (MoO₃) – less soluble, used in slow-release or granular fertilizers.
  • Chelated molybdenum (Mo-EDDHA, Mo-DTPA) – stable in a range of pH conditions, effective in complexed micronutrient formulations.
  • Molybdic acid (Hâ‚‚MoOâ‚„) – occasionally used as a source in substrate amendments.

Molybdenum (Mo) Deficiency in Caryopteris – Container Nursery Stock

Symptoms

  • Older leaves may show pale green or yellowing between veins (interveinal chlorosis).
  • Leaf margins may curl or become distorted.
  • Stunted growth, reduced branching, and smaller leaves.
  • Flowering may be reduced or delayed.
  • In severe cases, leaf necrosis or dieback can occur.

Causes

  • Molybdenum is required for nitrate reduction and other enzymatic processes; deficiency usually occurs in acidic soils (pH < 5.5).
  • Low levels of available Mo in the substrate or poor uptake due to waterlogged or compacted soil.
  • Excessive use of other fertilizers, especially ammonium-based, can reduce Mo availability.

Correction

  • Foliar application of soluble molybdenum salts (e.g., ammonium molybdate or sodium molybdate).
  • Adjust substrate pH to a slightly acidic to neutral range (6.0–7.0) to improve Mo availability.
  • Incorporate Mo-containing fertilizers into the growing medium.

Prevention

  • Routine addition of Mo-containing micronutrients in balanced fertilization programs.
  • Monitor substrate pH and maintain in optimal range for Caryopteris growth.
  • Avoid overuse of fertilizers that may antagonize Mo uptake.

Mo deficiency in Caryopteris

Scientific Name
Molybdenum (Mo)
Atomic Number
42
Atomic Weight u
95.95
Elemental Group
Micro elements (B, Cl, Cu, Fe, Mn, Mo, Ni, Zn) | Micronutrients
Available Forms

Available forms of Molybdenum (Mo) for use in Container Nursery Stock

  • Ammonium molybdate ((NHâ‚„)₆Mo₇O₂₄·4Hâ‚‚O) – highly soluble, commonly used in fertigation or foliar sprays.
  • Sodium molybdate (Naâ‚‚MoO₄·2Hâ‚‚O) – soluble, quick correction via substrate or foliar application.
  • Molybdenum trioxide (MoO₃) – less soluble, used in slow-release or granular fertilizers.
  • Chelated molybdenum (Mo-EDDHA, Mo-DTPA) – stable in a range of pH conditions, effective in complexed micronutrient formulations.
  • Molybdic acid (Hâ‚‚MoOâ‚„) – occasionally used as a source in substrate amendments.
Mo deficiency in Caryopteris

Molybdenum (Mo) Deficiency in Caryopteris – Container Nursery Stock

Symptoms

  • Older leaves may show pale green or yellowing between veins (interveinal chlorosis).
  • Leaf margins may curl or become distorted.
  • Stunted growth, reduced branching, and smaller leaves.
  • Flowering may be reduced or delayed.
  • In severe cases, leaf necrosis or dieback can occur.

Causes

  • Molybdenum is required for nitrate reduction and other enzymatic processes; deficiency usually occurs in acidic soils (pH < 5.5).
  • Low levels of available Mo in the substrate or poor uptake due to waterlogged or compacted soil.
  • Excessive use of other fertilizers, especially ammonium-based, can reduce Mo availability.

Correction

  • Foliar application of soluble molybdenum salts (e.g., ammonium molybdate or sodium molybdate).
  • Adjust substrate pH to a slightly acidic to neutral range (6.0–7.0) to improve Mo availability.
  • Incorporate Mo-containing fertilizers into the growing medium.

Prevention

  • Routine addition of Mo-containing micronutrients in balanced fertilization programs.
  • Monitor substrate pH and maintain in optimal range for Caryopteris growth.
  • Avoid overuse of fertilizers that may antagonize Mo uptake.