I live in S.E. Louisiana and have St. Augustine grass that has been crowded over with clover and dollar weeds. We have temps in the 80's. Atrazine used to be available at Ace Hardware and cannot find any at Walmart. Any idea if it has been discontinued or banned in this state? Has the label been changed, product renamed? If its not available...any recommendations on another product that will be just as effective? Any help would be greatly appreciated!