Toxicological assessment of fungicides for pathogens of <i>Pyrenophora tritici-repentis (Died</i>) in winter wheat
The article describes the laboratory experiments made to determine median toxic concentration (TC<sub>50</sub>) of fungicides taken from different chemical groups such as triazoles, strobilurins, morpholines and used both separately and in mixtures with fungicides for pathogens of <i>Pyrenophora tritici-repentis (Died</i>). One-component drugs from triazole group have been given, as 'Reks S' - CS of 125g/l, 'Tilt' - EC of 250 g/l and 'Folikur' - EC of 250 g/l. From strobilurin group we took 'Optimo' - EC of 200 g/l and some mixed fungicides, as 'Alto turbo' - EC of 250+160 g/l, 'Alto super' - EC of 200+80 g/l, 'Broader' - EC 150+150 g/l, 'Abakus ultra' - SE of 62,5+62,5 g/l, 'Konsul' - CS of 125+125 g/l, 'Amistar extra' - SC of 80+200 g/l and 'Reks ultra' - SE of 84+250 g/l. Toxicity of studied fungicides for pathogens of <i>Pyrenophora tritici-repentis (Died)</i> varied from strong toxic 0,33 mg/l to less toxic 2,29 mg/l according to median toxic concentration (TC<sub>50</sub>). The given results comply with previously published data about fungicide efficiency for pathogens of <i>Pyrenophora tritici-repentis (Died)</i> on winter wheat