An Australian turf herbicide resistance chart showing herbicide groups, such as the sulfonylureas, and pre emergent herbicide groups. Use this along with our weed ID chart and the free Guide to turf chemicals. This also shows herbicide sites of action to better help turf managers delay the development of resistance.

There is also an example of a pre-emergent and post emergent strategy to manage this. For example granular pre emergent herbicides will come under Groups 3, 14 and 15.

The new Monument herbicide alternative, Recondo herbicide is classed as a Group 2 post emergent herbicide. Duke herbicide is also in this herbicide group.

As we discuss in factors that affect herbicide performance, herbicide resistance in turf is a plant’s inherited ability to survive a herbicide application that would normally kill a weed. It does mean poor performance of a herbicide. Resistant weeds can often survive herbicide application at rates much greater than the recommended rate.

In Australia, over 25 weed species have populations that are resistant to at least one herbicide ‘mode of action’ (MOA) group. In turfgrass, globally this has become an increasing issue, with over 40 reports as of 2019. This means free guides like this herbicide group chart are invaluable in getting the best long-term results from your herbicides.

This link goes to a pretty cool herbicide classification tool.

An Australian turf herbicide resistance chart showing herbicide groups and sites of action to better help turf managers delay the development of resistance
Herbicide resistance chart

Herbicide Resistance Chart

Jerry Spencer senior turf agronomist and soil scientist
Senior Turf Agronomist at Gilba Solutions Pty Ltd | 0499975819 | Website

Graduated from Newcastle University with an Hons Degree in Soil Science in 1988, Jerry then worked for the Sports Turf Research Institute (STRI) as a turf agronomist before emigrating to Australia in 1993.

He followed this by gaining a Grad Dip in Business Management from UTS. He has worked in a number of management roles for companies as diverse as Samsung Australia, Arthur Yates and Paton Fertilizers.

He has always had a strong affinity with the Australian sports turf industry and as a result he established Gilba Solutions as an independent sports turf consultancy in 1993. Jerry has written over 100 articles and two books on a wide range of topics such as Turf Pesticides and Nutrition which have been published in Australia and overseas.