The response of winter barley to drift doses of imazamoxResponse of the winter barley (Hordeum vulgare L. var. Aydan Hanım) to imazamox drift rates was determined in trial experiments conducted Ankara province (Gölbaşı, Halaçlı village) in 2014 and 2016. The herbicide at the doses of 0.625, 0.315 and 0.08 g active ingredient (a.i.) da -1 was applied to winter barley plants during the first node stage using a CO2 pressurised knapsack sprayer. The field trials were set randomised block design with 4 repetitions. Phytotoxicity and yield loss caused by the lowest rate of herbicide was very limited while the yield loss caused by the high doses were very high. Parcel yields used at the highest herbicide dose (0.625 g a.i. da -1 ) was reduced by 55% compared to the untreated control in 2016 when precipitation was higher than normal. There was a closely relation between efficacy of the drift doses of herbicide and weather conditions. High amount of precipitation during the active growth stage can increase the detrimental effects of the herbicide. Keywords

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