The field efficacy of pre-and post-emergence herbicides and rotational use of different group of herbicides were tested against Phalaris minor in wheat on farmers’ fields during the year 2015–16 and 2016–17. Clodinafop is being used by 64% farmers at Makowal and 44% at village Mallu Nangal from the last five years. None of the farmer was using pre-emergence herbicide. The higher herbicide dose (76% at site I and 80% at site II) coupled with hallow cone nozzle and less quantity of water (200–225 l/ha) resulted in poor control of P.minor. At site I, continuous use of clodinafop resulted in poor weed control efficiency (58.7%) with lower grain yield (4.46 t/ha). Sequential application of preemergence herbicide pendimethalin followed by post-emergence application of clodinafop provided effective control of P.minor (WCE 76.8%) and significantly higher yield (5.1 t/ha) over the existing farmers’ practices (2 sprays of clodinafop at 45 and 65 DAS). At the second site, compared to clodinafop with pendimethalin, mesosulfuron + iodosulfuron, fenoxaprop + metribuzin or sulfosulfuron resulted into higher yield with effective weed control efficiency. Highest yield was recorded with spray of mesosulfuron + iodosulfuron (5.1 t/ha) which was statistically at par with pendimethalin (5.06 t/ha), fenoxaprop+ metribuzin (5.01 t/ha) and sulfosulfuron at 15 DAS (4.98 t/ha).
Clodinafop, Herbicide resistance, Phalaris minor, Wheat
