Resistance Surveys

WA’s herbicide resistance status

The 2015 survey assesses the state of herbicide resistance to commonly used herbicides in the Western Australian wheatbelt, for five important weeds. 509 paddocks were visited at harvest. The weed seed samples collected were screened for resistance to commonly used herbicides at recommended field rates with results accessible by region.

For resistance survey information on individual WA cropping zones and then by crop weed species, please go to the map below and click on a zone.

For comprehensive information on  Herbicide Resistance Surveys summary April 2022

For Crop Contamination survey research