Compatibility of herbicides against grassy weeds in wheat

Field and pot studies were conducted to determine the compatibility of dicamba in tank mix combination with sulfosulfuron and clodinafop against weeds of wheat (Triticum aestivum). Dicamba alone was effective against broad-leaf weeds only. No significant difference for broad-leaf weed control was observed between dicamba doses of 240 and 360 g/ha. Dicamba in combination with clodinafop and sulfosulfuron controlled the broad spectrum weed flora. The efficacy of dicamba in combination with clodinafop and sulfosulfuron was not affected for broad-leaf weed control. However, Phalaris minor control with clodinafop was reduced when dicamba applied as tank mix combination. The efficacy of sulfosulfuron was not affected by dicamba when applied as tank mixture and as a result this mixture (sulfosulfuron + dicamba 25 + 120 g/ha) had the highest wheat grain yield (4.99 t/ha). P. minor dry weight reduction with clodinafop 60 g/ha alone and in tank mix combination with dicamba 240 g/ha was 97.3 and 58.3%, respectively. In pot studies also, the tank mixing of dicamba did not affect the sulfosulfuron efficacy but clodinafop efficacy was significantly reduced against P. minor. The P. minor biomass reduction with clodinafop 30 and 60 g/ ha was 84.8 and 99.6%, respectively and when dicamba 240 g/ha was added, the fresh weight reduction reduced to 62.6 and 78.6%, respectively, compared to untreated control.