Cold, hard truth on herbicide resistance

Updated February 9 2018 - 2:52pm, first published 1:55pm
Close-up of a Bent grass golf green infested with a mixture of herbicide resistant (green) and susceptible (yellow) winter grass. (Photo: Jyri Kaapro, Bayer Crop Science).
Close-up of a Bent grass golf green infested with a mixture of herbicide resistant (green) and susceptible (yellow) winter grass. (Photo: Jyri Kaapro, Bayer Crop Science).

A PREVIOUSLY low-key weed, winter grass (Poa annua) is challenging the herbicide resistance crown held by annual ryegrass, with glyphosate-resistant populations being confirmed in Victoria.

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