I tested Quicksilver and different herbicides. Left to right. Quicksilver, Quicksilver and a 3-way, Quicksilver and T-Zone, Quicksilver and Speedzone. Weeds were mostly violets with a few chickweed and veronica. T-Zone and Speedzone with Quicksilver were highly effective, but I was not able to judge long term results. Second photo shows injury to the grass, however there was good weed control on dandelion. Treatment combined Drive, Speedzone, T-Zone, and Quicksilver. Clearly, too much herbicide. Third photo shows Drive plus Quicksilver; dandelion rapidly turned completely brown, (after about 48 hours).