Cousin had trouble with annual mercury last year and he had to got twice with debut.
At BBRO day last week the lady from upl did mention which chem for annual mercury but I didn't listen as it isn't something Ive come across. It might have been quinmeric or dimethanim p
What he saidTopkat, which is quinmerac plus dimethanamid p has a label use against annual mercury and is suitable for sugar and fodder beet. If that helps. Up to leaf 9.