09.09.2011 | permalink
WEED management expert Chris Preston is skeptical about whether glyphosate interferes with crop mineral uptake, but he’s in no doubt about the resistance problems that are emerging from injudicious use of a cheap, easy tool. Annual ryegrass, barnyard, windmill and liverseed grasses, and fleabane, have developed glyphosate-resistant populations, and Dr Preston thinks a sixth plant is about to join the list.