Chemical control of Cyperus rotundus in pineapple.
Field trials indicated that bromacil at 4.0 kg/ha applied post-emergence was the only effective herbicide against C. rotundus, increasing pineapple yields by 25.9% in relation to the control. Terbuthylazine + terbumeton, terbuthylazine + etazine, each at 4.5 kg/ha; bentazone at 2.5 kg/ha; metribuzin at 3.5 kg/ha; fluorodifen at 3.6 kg/ha; and dalapon at 8.5 kg/ha all gave poor results.<new para>ADDITIONAL ABSTRACT:<new para>In 5-year trials with the pineapple cv. Espanola Roja numerous herbicides were applied post-emergence. Only bromacil at 4 kg/ha gave good control of C. rotundus and increased the yield, from 20.42 t/ha in the manually/mechanically weeded plots to 25.71 t/ha.