Abstract
A trial was conducted at the Gurabo Substation, Gurabo, Puerto Rico, to evaluate different methods (biological, manual and chemical) for controlling jointvetch (Aeschsynomene sensitiva Sw.) and waterprimrose [Ludgia erecta (L.) H. Hara] in rice. The sequential applications of either propanil [N-(3,4-dichlorophenyl) propanamide] or thiobencarb [S-(4-chlorphenyl) methyl diethylcarbamothioate] as early postemergent, followed by a mixture of 2,4-D [(2,4-dichlorophenoxy) acetic acid] and bentazon [3- (1 -methylethyl)-(1H)-2,1,3-benzothiadiazin-4-(3H)—one 2,2-dioxide] were found to be the two best treatments. Both treatments oufyielded all others except the weeded check. The sequential application of propanil followed by Collego™ (a mycoherbicide) gave only fair weed control and produced a poor yield.