Mosquito larvacide available at De Queen City Hall.– The Arkansas Department of Health has provided the City of De Queen with tablets which can be used to treat standing water for mosquito larvae. The product, called Natular DT, can kill mosquito larvae for up to 60 days. Each tablet will treat about 50 gallons of water, or 25 square feet, six inches deep. These are available at no cost at the front desk at De Queen City Hall.  Pick up some today and help “fight the bite.”