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Knockdown Herbicide Resistance. Increase in glyphosate resistance in 7 years. Heap, 2018. # stopped counting; * Multiple Resistance BCDMZ. Glyphosate resistance mechanisms. Wild radish – multiple resistance to B, I, F, M. Paraquat resistance. Glufosinate – Group N. Amitrole - Group Q.
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Increase in glyphosate resistance in 7 years Heap, 2018
Glyphosate resistance mechanisms Wild radish – multiple resistance to B, I, F, M
Preventing resistance to knockdown herbicides • Use tank mixes of two different modes of action at robust rates that are effective on the target species – remember synergy is rare – keep both rates high! • Prevent any survivors of spraying from setting seed. • Use a double knock – 2 effective herbicide applications or non-herbicide tactics in close succession – 1 to 14 days apart • monitor spray effectiveness • Rotate modes of action See WEEDsmart “Big 6” for cropping