Growing more than an inch per day, the rhizome may extend in a thick, underground mat up to ten feet from the original plant. The Roundup formulation used contained no surfactant. 2 Percentage of top growth control 14 days after treatment. 3 Percentage of buds not producing regrowth after 14 days. However, drift concerns increase at lower spray volumes .
Ammonium sulfate can help overcome water quality problems.
Preharvest Roundup Roundup applied preharvest gives acceptable control of quackgrass.