The species Bromus secalinus L. (rye broom) is a dangerous, hibernating annual grass weed that infests rye (Secale cereale), winter wheat (Triticum aestivum) and other cereal crops. The present study aims to identify chemical variants for controlling the species Bromus secalinus L. in winter wheat crops, by using a diversified range of post-emergent herbicides, approved for this crop. Research on the chemical control of the species Bromus secalinus (rye broom) was carried out during 2022 and 2023, in an experimental field located in the locality of Peciu Nou, Timiş County. The variants (5 + 1 untreated control variant), each in 4 repetitions, were represented by 5 herbicides approved in Romania for the control of monocotyledonous weeds in wheat crops, at the time of the research. The experimental variants were the following: V1 - control (non-herbicide); V2-Atlantis Flex WG (mesosulfuron-methyl 45 g/kg + propoxycarbazone - sodium 67.5 g/kg + mefenpyr-diethyl (safener) 90 g/kg) - 0.3 kg/ha; V3-Axial One EC (pinoxaden 45 g/l + florasulam 5 g/l + cloquintocet-mexil 11.25 g/l) - 1 l/ha; V4-Herbos 110 EC (fenoxaprop-P-ethyl 110 g/l) - 0.7 l/ha; V5-Hussar Activ Plus OD (iodosulfuron-methyl-Na 10 g/l + 2.4 D (2-ethylhexyl ester) 300 g/l + thiencarbazone-methyl 7.5 g/l, mefenpyr diethyl (safener) 30 g/l) - 1 l/ha; V6-Senior (piroxsulam 7.5 % + cloquintocet-methyl (adjuvant) 7.5 %) 250 g/ha + 1 l/ha Dasoil (adjuvant) – 0.25 kg/ha. We detected 15 segetal species in the field, of which, the species addressed in the study - Bromus secalinus L. (popularly called rye brome), had a share of 24.3 % (i.e. 33.8 plants/m2). The Senior herbicide (piroxsulam 7.5% + cloquintocet-methyl (adjuvant) 7.5%) 250 g/ha + 1 l/ha Dasoil), at a dose of 0.25 kg/ha, almost completely controlled grass weeds, including Bromus secalinus (98.1%), but also the other weeds present (85.9%). The maximum production (6628 kg/ha) was also obtained in this variant.

rye brome, weeds, herbicides, winter wheat crops

agronomy

Presentation: poster