Seven herbicides, alone or in combinations, were tested for weed control on watermelon, Citrullus lanatus (Thunb.) Matsum. & Nakai cv. Charleston Gray, and cucumber, Cucumis sativus L. cv. Chipper, during 1967 to 1972. Preemergence applications of nitralin (4-(methylsulfonyl)-2,6-dinitro-N,N-dipropylaniline) controlled most weed species without seriously injuring either crop. The combination of bensulide (O,O-diisopropyl phosphorodithioate S-ester with N-(2-mercaptoethyl) benzenesulfonamide) with either chloramben, methyl ester (methyl 3-amino-2,5-dichlorobenzoate) or naptalam (N-1-naphthylphthalamic acid) controlled a broader spectrum of weeds than any of the compounds applied singly.
Received for publication July 9, 1974. Cooperative investigations of the USDA, Agricultural Research Service, and the University of Georgia, College of Agriculture Experiment Stations. All agricultural chemicals recommended for use in this report have been registered by the Environmental Protection Agency. They should be applied in accordance with the directions on the manufacturer’s label as registered under the Federal Insecticide, Fungicide, and Rodenticide Act, as amended by the Federal Environmental Pesticide Control Act.