Moderate resistance risk
Group Q resistance exists in Australia in annual ryegrass resistant to amitrole. This has only occurred in 3 populations and this type of resistance is rare in Australia.
To assist in delaying the onset of resistance, consider alternating Group Q herbicides with herbicides from other modes of action for example. (Group L) eg paraquat, (Group N) eg glufosinate or (Group M) eg glyphosate.
Consider using alternative methods of weed control to reduce weed numbers before applying herbicides.
All the above recommendations should be read in conjunction with the Integrated Weed Management (IWM) strategies
CHEMICAL FAMILY ACTIVE CONSTITUENT (FIRST REGISTERED TRADE NAME)
GROUP Q Bleachers: Inhibitors of carotenoid biosynthesis unknown target
Isoxazolidinones: clomazone (Command®)
Triazoles: amitrole (Alliance®*, Amitrole®, Illico®*)
* This product contains more than one active constituent
List of chemical families, approved active constituents and, in parenthesis, the trade name of the first registered product or successor. Refer to the APVMA website (www.apvma.gov.au) to obtain a complete list of registered products from the PUBCRIS database.
Content last updated: June 28, 2017