Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Chemical control of Cyperus rotundus in pineapple.

Abstract

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.