Determination and Mapping of Resistant Wild Oat (Avena sterilis L.) Populations to Most Commonly Used Herbicides in Wheat Fields for Osmaniye, Turkey

This study was determined the resistance levels of ACCase [Acetyl CoA Carboxylase] (Clodinafop-propargyl) and ALS [Acetolactate Synthase] (Mesosulfuron-methyl + Iodosulfuron-methyl sodium and Pyroxulam) inhibitor herbicides for wild oat ( Avena sterilis L.) in Osmaniye and Cukurova. 103 sampling points have determined and have sampled for two years to reveal the resistance index. Wild oat frequency percentage was found 81.84% in 49 fields, 67.03% in 63 fields and 80.7% in 80 fields between 2013 and 2015 respectively. As a result of this study, resistance maps were created for used herbicides in Osmaniye. Cross-resistance was seen in 51 fields from 103 sampling points. In addition, Multiple resistance for ACCase and ALS inhibitors have observed in 5 fields.