How long after Glyphosate application does effect typically appear?

• A. 12-24 hours
• B. 2-7 days
• C. 2-3 weeks
• D. Immediately

Answer: (B)

Glyphosate works systemically, so the plant must take it up and move it to growing points before you’ll see the effects. Because of this, you don’t get an instant change after spraying. Under typical field conditions, the first visible signs—yellowing, wilting, and browning of treated tissue leading toward death—show up over several days, usually within two to seven days. Some plants or larger plants may take longer to respond, and complete kill can take two to three weeks in some cases, but the common timeframe for initial effects is about 2–7 days. Immediate effects (a few hours) aren’t expected, and waiting two to three weeks for the first indication is longer than typical.