SELECTIVITY AND STABILITY OF SOME HERBICIDES FOR ANNUAL GRAMINACEOUS WEED CONTROL APPLIED DURING STEM ELONGATION STAGE OF DURUM WHEAT (Triticum durum Desf.)

The experiment was carried out during 2018-2020 in the experimental field of Field Crops Institute -Chirpan with durum wheat cultivar Progress (Triticum durum Desf.). The influence of 6 antigraminaceous herbicides was tested -Palace 75 WG (piroxulam) -250 g/ha; Axial 050 EC (pinoxaden) -900 ml/ha; Traxos 045 EC (pinoxaden + clodinafop) - 1.3 ml/ha; Topic 080 EC (clodinafop) -450 ml/ha; Puma super 7.5 EB (phenoxyprop-ethyl) -1 ml/ha; Hussar max WG (mesosulfuron + iodosulfuron) -250 g/ha. Herbicides were applied at the beginning of stem elongation stage -during 1st, 2nd and 3rd stem node stage of durum wheat. The highest grain yield was obtained by treatment of herbicide Topic during 1st stem node stage of durum wheat, followed by herbicides Puma super, Axial and Hussar max. During 2nd stem node stage of durum wheat, the highest grain yield was obtained by treatment of herbicide Puma super, followed by herbicides Traxos, Axial and Topic. During 3rd stem node stage of durum wheat, the highest grain yield was obtained by treatment of herbicide Puma super, followed by herbicides Topic and Traxos. Technologically, the most valuable are herbicides Puma super, Hussar max, Traxos and Palace, applied during 1st stem node stage; herbicides Hussar max, Topic and Puma super applied during 2nd stem node stage and herbicides Hussar max, Puma super, Topic and Traxos applied during 3rd stem node stage.