Will spraytopping or croptopping with glyphosate be effective on glyphosate resistant plants?
No. Research has shown that seeds will remain viable if glyphosate is applied as a spraytop or croptop to glyphosate resistant annual ryegrass. Spraytopping or croptopping with glyphosate should not be undertaken on populations known or suspected to be resistant to glyphosate and an alternative mode of action herbicide should be used.
