Published in Scientific Papers. Series A. Agronomy, Vol. LXIII, Issue 1
Written by Grozi DELCHEV
The research was conducted during 2015-2017 on pellicvertisol 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.Self-sown plants of Clearfield canola in durum wheat crops are successfully controlled by herbicide Biathlon only. Self-sown plants of Clearfield and ExpressSun sunflower are controlled by herbicides Biathlon, Lintour and Secator. Self-sown plants of coriander are controlled by herbicides Lintur, Granstar super and Secator. Self-sown plants of milk thistle are controlled by herbicides Lintur and Secator. There is synergism in herbicide Traxos and very good efficacy against Bromus arvensis L. There is antagonism in herbicide tank mixture Scorpio super + Lintur and decreasing of the efficacy against Galium aparine L., Chamomilla recutita Rauchert, Myagrum perfoliatum L., Cirsium arvense Scop. and Apera spica-venti P.B. For complete control of all weeds and self-sown plants in durum wheat crops, two herbicides should be combined - both antigraminaceous and antibroadleaved.
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