Seven insecticides were applied separately and in combination with the herbicide propanil (3,4-dichloropropionanilide) to young rice. None of the insecticides applied alone caused leaf burn. Toxaphene and endrin, in combination with propanil, did not increase leaf burn over that which occurred from propanil alone. Malathion, phosphamidon, Guthion (O,O-dimethyl S-4-OxO-1,2,3-benzotriazin-3(4-H)-ylmethyl) phosphorodithioate and Dylox, (O,O-dimethyl 2,2,2-trichloro-1-hydroxyethyl phosphonate) in combination with propanil, increased leaf burn over that which occurred from propanil alone. In general, increased leaf burn resulted in decreased yields of rough rice.