Just began using it because it was recommended by Lesco rep. Label says avoid using on st. augustine during green-up. i missed that point on the label before my first two tank mixes. i mixed at 1.5 oz/1000. I haven't seen any injury, but does anyone have positive or negative experience w/ this product on st. augustine during green-up? speedzone southern has 10.49% 2,4-d. any concerns or positive/negative experiences? i know it's a product to avoid above 85 or so. also, what rate do you use in a backpack. label was vague. i mix for 1.5 gal/1000 in tank. what product do you like for post emergent wc in st.augustine? Thanks!