MSMA Herbicide Alternatives: Quinclorac for Grassy Weed Control

Monosodium methanearsonate (MSMA) was removed from the market due to arsenic accumulation concerns. Need a replacement for grassy weed control? Quinclorac is the answer.

Products Containing Quinclorac

• Bayer Lawn Weed and Crabgrass Killer
• Ortho Weed B Gon MAX Plus Crabgrass Control
• Bonide WeedBeater Ultra

Why Quinclorac Works

Quinclorac effectively controls crabgrass, foxtail, and other grassy weeds in established turf. It's safe on most cool-season and warm-season grasses when used as labeled. Unlike MSMA, it doesn't pose arsenic-related environmental risks.

Application Tips

• Apply to actively growing weeds in warm weather (70-90°F).
• Add methylated seed oil surfactant for improved uptake.
• Don't mow 2 days before or after application.
• Water in after 24 hours if no rain expected.

Integrated Approach

Combine with proper mowing height, fertilization, and pre-emergent herbicides for long-term grassy weed management without relying solely on post-emergent treatments.