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herbicide x species matrix demonstration

Key Points

  • The site is mainly Annual ryegrass with minimal broadleaf weeds.

  • Limited data was available at the time of writing but there are good visual responses from the pre and post applications. Collated data will be available once all treatments are available for assessment.

  • The trial also demonstrates effective control methods for volunteer crops that may become troublesome post knockdown.


This demonstration is designed to showcase the effect of several different herbicide treatments across a range of crop types.  It is non-replicated but showcases the likely effects with some safe on the various crops and some herbicides actually controlling the crops, as would be the case if they were self-sown weeds.

The late post-emergent application was used to demonstrate the differences in burn down between group G (14) herbicides as well as trying to demonstrate “where to add the G in a double knock”.

This should provide a very interactive experience and open discussion of the options available to growers.



Pre and post applications at the time of writing have show results in line with expectations of growers and agronomists. Pre-emergent chemistry has worked well in most cases with good levels of control across the tratments given the rain and good conditions for herbicidal activity in field. The safety of different herbicides for plantbacks and possibly re-seeding opportunities is clearly demonstrated with the likes of propyzamide effect on the wheat and barley. These effects help growers to discern what options they have after using certain pre emergent herbicides in field in the event of a windblow or failed establishment.


Post emergent effects also demonstrate the ability of a range of herbicides to control volunteers in crop and demonstrate the ability of a range of commonly used EPE treatments to control broadleaf and grass weeds in crop as well as demonstrating the differences in crop safety. Assessments for total control as well as crop safety will be conducted in conjunction with the knockdown trial assements following application. Knockdown treatments are being applied later in the season to demonstrate the differences between these in paddock. Optimal viewing of these treatments is usually 2 weeks post application and relevant assessments will be conducted following.

Name: Tristan Clarke
Phone: 0417 253 586

Name: Bevan Addison

Phone: 0427 422 852


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