Herbicide residues after drought

information sheet
Released/reviewed: Dec 2006

Herbicide carryover problems are exacerbated in drought years due to reduced herbicide breakdown. This is of particular concern in alkaline soils.

Residual herbicides of concern include the group B herbicides (including the sulfonylureas,
Broadstrike®, Spinnaker® etc.) and group C (e.g. atrazine and simazine) products. Topics covered include:

  • herbicide carryover
  • herbicide information
  • herbicide breakdown
  • assessment.