Rice water weevil (Lissorhoptrus oryzophilus) is a pest of economical importance throughout the rice production growing areas in the United Stated, attacking newly emerged rice plants when they are most susceptible to damage. Adults feed on the leaves causing numerous scars and reducing photosynthesis. However, feeding by the larval stage results in extensive damage to the root system which causes significant economic losses. Rynaxypyr^TM (DPX-E2Y45) is a new insecticide from DuPont, in a new chemical class, the anthranilic diamides. Results indicate Rynaxypyr^TM as a seed treatment is very effective in protecting the roots from rice water weevil damage and providing increased yield. Results from this work will be discussed.