I just tested some Quiclsilver on weeds across the street. I used it on mallow, purslane and spurge. The solution was old--had been mixed up in a hand sprayer about 2 weeks ago--and it has been above 85 most days. It was amazing--within 24 hours.purslane --just destroyed. Mallow destroyed. Spurge not too much effect. Mallow does not respond to Three-way. Conditions on Sept 1--warm and dry. I would expect Speedzone, Surge and Octane to work about the same.