DeFrank, J.; Clement, C.R. 1995. Weed control in pejibaye heart of palm plantations in Hawaii. HortScience, 30(6):1215-1216.
Abstract: Pejibaye (Bactris gasipaes, Palmae) is being evaluated for production of fresh heart of palm in Hawaii. Precocity, yields and weed control were evaluated in response to woven black polypropylene mat (control), oryzalin, oxyfluorfen and paraquat. Control plots attained 100% of plants harvested by 26 months, followed by oxyfluorfen (97.5%), oryzalin (77.5%), and paraquat (60%). Estimated heart of palm yields (3731 plants·ha 1) were similar with oxyfluorfen 1.2 kg ai/ha (707 kg·ha 1), polypropylene mat (612 kg·ha 1), oxyfluorfen 0.6 kg ai/ha (600 kg·ha 1) and oryzalin 4.5 kg ai/ha (478 kg·ha 1). Based on precocity, yields and weed control efficiency, the performance rating of these weed control treatments was: mat oxyfluorfen > oryzalin > paraquat. Chemical names used: 4-(dipropylamino)-3,5-dinitrobenzenesulfonamide (oryzalin); 2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl)benzene (oxyfluorfen); 1,1'-dimethyl-4-4'-bibyridinium ion (paraquat); N-(phosphonomethyl)glycine (glyphosate).