Ortho to rescue. OR NOT! Take a look at this product which claims to control poa annua (annual bluegrass). Look at the fine print on the front of the bottle. http://www.scotts.com/smg/catalog/productTemplate.jsp?proId=prod10550011&itemId=cat50064&tabs=usage Ingredients .05 percent sulfentrazone. What gives? I am mystified. The professional product "Dismiss" does not claim to control poa annua.