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Creation date: 08 July 2014

Rustler registered in Canola

Rustler®, a selective herbicide from Cheminova, has been registered for use in Canola. Rustler provides selective control of annual ryegrass, other grasses and some broadleaf weeds. The registration makes Rustler SC the only propyzamide herbicide registered for use in Canola in Australia.


View the updated RUSTLER LABEL (pdf) or visit www.rustlerherbicide.com.au


Portfolio Manager for Cheminova Australia, Cameron Clarke, said the registration for Canola came through at the start of June, in time for use this season. “Rustler SC is an attractive addition to a grower's toolkit in the fight against annual ryegrass in canola. Adding to it's appeal is the efficacy demonstrated on other problematic grass weed species such as barley grass, silver grass and wild oats. It also has activity on seedling sorrel, wireweed and chickweed.”


The June registration was good news for Cam Conboy of Gorst Rural in Lake Bolac, Victoria.


“Rustler is a versatile herbicide. We will use it early on to target germinating weeds when the crop is establishing, making it a key partner in our canola weed control programs.”


Extensive annual ryegrass herbicide resistance in southern Australia has meant there are limited post-emergent herbicide options for annual ryegrass control in break crops. Finding alternate and effective pre- and post-emergent options has been crucial.


“Post-emergent herbicide applications in canola can be difficult if paddocks get wet” said Cam. “Rustler, in combination with Atrazine and/or Trifluralin, provides an option to hit weeds hard up front. It gives the crop a strong chance of establishment without the risk of wet weather causing delay in getting weeds under control.”


Since canola is usually seeded from late April through June, it is placed into cold or cooling soil, leading to slow early growth in a 'normal' season. Crops are therefore very susceptible to competition from weeds, which can affect nutrient uptake by the canola plants and thus affect yield. Given that the best results with Rustler are obtained when applied during cool and moist conditions, the product is a good fit in canola.


Herbicide resistance now affects over 20 species of Australian weeds, foremost among them being annual ryegrass. Farmers are being encouraged to adopt integrated weed management to address the resistance problem — largely through the rotation of herbicide groups and the avoidance of treating large numbers of weeds with a single herbicide.


Rustler SC is a group D herbicide. As the only registered propyzamide in canola the product provides an additional option for control of problematic weeds as part of an overall resistance management strategy.


The active ingredient in Rustler SC, propyzamide, is relatively insoluble and even in moist soil tends to move less than 5cm down the soil profile. For best control, target weed seeds that germinate in the treatment zone — in the top 5cm of the soil.


Key factors for achieving the best results with Rustler SC:

  • Apply to moist soil, or prior to rain or irrigation
  • Use when soil temperatures are low
  • Non-till or minimum soil disturbance prior to planting
  • Apply to a firm, clod-free seedbed
  • Target germinating grasses and weeds


Rustler SC is registered for use in canola as a pre-emergent herbicide and should be incorporated by sowing (IBS). It should be rotated with other chemistry groups as part of a resistance management strategy.

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