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Weed Management

Bayer Crop Science

Resistance management into practice

Article overview

The Bayer Mode of Action Survey 2023 identified that resistance management is a high priority to most farmers. 98% of 243 participants say is it very important or fairly important to agronomy on farm. With no herbicide completely safe from the spectre of resistance, what practical steps can farmers take to maintain herbicide efficacy?

How real is the danger?

As a rule, pre-emergence herbicides are less prone to resistance than contact-acting chemistry, this is borne out by the survey results which show far more farmers reporting post-em resistance than pre-em. But resistance to some pre-em active is already a problem particularly in Italian ryegrass. Critically, resistance tends to be a ‘one-way street’, it doesn’t go away so prevention is really the only cure.

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