Written by cpm
Thinking of spraying stubbles with a field rate of glyphosate below 540g/ha? Think again, say experts, as that’s exactly what’ll lead to resistance. CPM assesses what the research means for post-harvest stubble management. Even those who don’t believe the risk exists should nonetheless follow the WRAG guidelines. By Tom Allen-Stevens With reduced sensitivity to glyphosate now confirmed in populations of both blackgrass and brome grasses, grassweed researchers have stressed the critical importance that all arable farmers in the UK adopt Weed Resistance Action Group (WRAG) guidelines in their stubble management this year. “Growers who are blasé about glyphosate resistance are the ones most at risk of being the first in the UK to suffer from grassweed populations that develop it,” warns Lynn Tatnell of ADAS, who leads the five-year, AHDB-funded project on managing resistance risk to glyphosate. More than 16,000 seedlings were grown on in glasshouses to test the effectiveness of glyphosate. “Even those who don’t believe the risk exists should nonetheless follow the WRAG guidelines – glyphosate is such a critical aspect of grassweed control, the industry cannot afford to allow resistance to develop.” The warning follows research led by Rothamsted Research and published in the March 2019…
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