The research was conducted during 2015 - 2017 on pellic vertisol soil type. Under investigation was Bulgarian durum wheat cultivar Elbrus (Triticum durum Desf.). Factor A included untreated control and 4 antigraminaceous herbicides – Axial 050 EC (pinoxaden) - 900 ml/ha, Topic 080 EC (clodinafop) - 450 ml/ha, Traxos 045 EC (pinoxaden + clodinafop) – 1.20 l/ha and Scorpio super 7.5 EB (fenoxaprop-ethyl) – 1 l/ha. Factor В included untreated control and 4 antibroadleaved herbicides – Biathlon 4 D (tritosulfuron + florasulam) – 55 g/ha, Lintur 70 WG (triasulfuron + dicamba) – 150 g/ha, Granstar super 50 SG (tribenuron-methyl + tiphensulfuron-methyl) – 40 g/ha and Secator OD (amidosulfuron + iodosulfuron) – 100 ml/ha. All of antigraminaceous herbicides, antibroadleaved herbicides and their tank mixtures were treated in tillering stage of the durum wheat. Herbicide tank mixtures Scorpio super + Lintur and Traxos + Granstar super do not proven increase germination energy of the durum wheat seeds. Laboratory seed germination do not prove increased by combination of antigraminaceous herbicide Scorpio super with antibroadleaved herbicide Lintur only. Length of coleoptile is decreased by herbicide tank mixtures Scorpio super + Lintur and Traxos + Granstar super. Herbicide tank mixture Scorpio super + Lintur decreases lengths of primary roots and also increases waste grain quantity. Herbicide tank mixture Traxos + Secator lead to obtaining of the highest grain yield. High yields of durum wheat grain also are obtained by herbicide tank mixtures Traxos + Biathlon and Axial + Biathlon.

durum wheat, herbicides, herbicide tank mixtures, grain yield, sowing characteristics

field crops and pastures

Presentation: poster