Mosquitofish, Gambusia affinis (Baird and Girard), green sunfish, Lepomis cyanellus Rafinesque, and combinations of both species were evaluated in Arkansas rice plots to ascertain the optimum stocking rate necessary for reduction of dark rice field mosquito larvae, Psorophora columbiae (Dyar and Knab). Stocking rates of 2000 mosquitofish/acre produced >90.0% larval reduction. Green sunfish stocked at 480 fish/acre produced >85.0% larval reduction. Green sunfish stocked at heavier rates produced no additional reduction. When both fish species were stocked in combination there appeared to be a slight additive effect. At a stocking rate of 500 mosquitofish and 120 green sunfish/acre, 96.7% larval reduction was obtained which was better than either species stocked alone at all stocking rates. In stocking combinations of both species the benefits of both were obtained. Therefore, it appeared that the combination stockings were the best means of reducing larval populations.