By smoothing the reviews, I thought, great is what I need, after two sprays at intervals of 3 days, no effect, everything remained in a state, it may be necessary to wait for you more, but I begin to doubt, it's been eight days !! ?? to be continued ............. Voila past 15 days, impeccable it works, but beware it is a total non-selective weed killer !! very effective in the aisles, weeding between slabs etc ....... but if not careful if you use it on your lawn !! 15 ml per 1 liter of water and impeccable!