Strategies for increased yellow nutsedge (<i>Cyperus esculentus</i>) control in turfgrass with halosulfuron, sulfentrazone, and physical removal

Abstract Yellow nutsedge is one of the most widely distributed and troublesome weeds in world. Field greenhouse studies were conducted to optimize strategies for increased yellow control turfgrass with halosulfuron sulfentrazone. In field study perennial ryegrass mixture, single or sequential applications (3 wk after initial) sulfentrazone made on June 3, 23, July 15, August 5 2013, 2014, 2015, 2016. Percent was rated within same growing season September 17 following year 3 carryover control. confirm that a 3-wk interval resulted &gt;95% nutsedge–turfgrass mixture. study, both herbicides reduced root rhizome dry mass from 39% 98%, number new tubers tuber fresh weight 38% 100%, prevented re-emergence. Sequential either herbicide early postemergence recommended optimal Herbicide application using should be as possible postemergence, preferably at three- five-leaf stage 200 250 degree days (GDD, 10 C base). Mowing can an effective method reduce growth. 7.6 cm weekly by 55% formed 63% study. Physical removal plants such hand-pulling manage (200 GDD). End-users maximize integrating treatments cultural practices mowing hand-pulling.