Abiotic in-crop constraints for wheat

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Contact herbicide damage

Constraint - Contact herbicide damage

Symptoms

  • General wilting of plants
  • Yellowing (chlorosis) of leaves
  • Tip death
  • in severe cases, plant death

Damage

  • Symptoms appear within hours or one or two days of application, depending on the herbicide used, and can be mild or severe.
  • The pattern of damage reflects spray coverage 
  • Contact herbicide spots may be caused by spray drift, but plants will generally recover
  • Serious damage is generally caused by direct spraying and generally causes death within 4 days

Control

There are no treatment options, plants either die or completely recover. As a precaution, spray when the risk of drift is low or when environmental conditions are safe.

Links and Resources

DAFWA - Contact herbicide damage

What to look for in paddock and on plant, what else could it be, where does it occur, and treatment.

DAFWA - Glyphosate damage

Introduction, what to look for on plant and in paddock, what else could it be, and treatment.