Oilseed rape growers to benefit from additional herbicide - Farmers Weekly

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Oilseed rape growers to benefit from additional herbicide

Specific Off-Label Approval has been awarded to Avadex, allowing oilseed rape growers to take advantage of its activity against blackgrass and broad-leaved weed infestations in winter and spring-sown crops.


Before the awarding of this SOLA to United Oilseeds, Avadex was not available for use on oilseed crops.

Evidence from trial work carried out by Agrovista suggests that, while blackgrass has developed some resistance to many of the more commonly used herbicides available, little or no resistance to Avadex has yet been recorded. The SOLA will, therefore, provide a useful addition to control blackgrass, which is becoming more prevalent.

“With blackgrass becoming an increasing issue for many oilseed growers, getting the basics right in terms of weed control has never been more important,” says Agrovista’s technical manager Mark Palmer.

“As long as it is used correctly, evidence from our trials suggest that applying Avadex as a pre-emergent can significantly improve the efficacy of subsequent herbicide applications by sensitising the weed population,” said Dr Palmer.

More recently it has been used to control wild oats and sensitise blackgrass to subsequent herbicide applications. In addition, Avadex also helps to control additional broad-leaved weeds, including charlock, speedwell, poppy and fumitory.

“The efficacy of Avadex in helping to control blackgrass prompted United Oilseeds to apply for the SOLA, so that our members could benefit from improved weed control,” explains Richard Elsdon, technical manager for United Oilseeds.

“We worked in conjunction with Agrovista’s technical team to develop the recommendation, and used their ongoing trial work to support our application for a licence.”

Avadex can be applied as a pre-emergent only and just one treatment is allowed. Avadex should be applied by a specialist applicator or by a suitably qualified spray contractor.

Oilseed rape growers to benefit from additional herbicide

A new Specific Off-Label Approval licence has successfully been awarded to Avadex, allowing oilseed rape growers to take advantage of its activity against black-grass and broad-leaved weed infestations in winter and spring-sown crops.



Before the awarding of this SOLA to United Oilseeds, it was not available for use on oilseed crops.

Evidence from trial work carried out by Agrovista suggests that, while black-grass has developed some resistance to many of the more commonly used herbicides that are currently available, little or no resistance to Avadex has yet been recorded. The SOLA will, therefore, provide a useful addition to control black-grass which is becoming more prevalent.

“With black-grass becoming an increasing issue for many oilseed growers, getting the basics right in terms of weed control has never been more important,” says Agrovista’s technical manager Mark Palmer.

“As long as it is used correctly, evidence from our trials suggest that applying Avadex as a pre-emergent can significantly improve the efficacy of subsequent herbicide applications by sensitising the weed population,” said Dr Palmer.

More recently it has been used to control wild oats and sensitise black-grass to subsequent herbicide applications. In addition, Avadex also helps to control additional broad-leaved weeds, including charlock, speedwells, poppy and fumitory.

“The efficacy of Avadex in helping to control black-grass prompted United Oilseeds to apply for the SOLA licence, so that our members could benefit from improved weed control,” explains Richard Elsdon, technical manager for United Oilseeds.

“We worked in conjunction with Agrovista’s technical team to develop the recommendation, and used their ongoing trial work to support our application for a licence.”

Avadex can be applied as a pre-emergent only and just one treatment is allowed. Avadex should be applied by a specialist applicator or by a suitably qualified spray contractor.

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