Resistance behaviour of Septoria tritici to some fungicides in the territory of the Czech Republic

• Published in: Acta Agrobotanica Vol. 58; no. 1; pp. 79 - 84
• Main Authors: Tvaruzek, L.,Agricultural Research Institute Kromeriz (Czech Republic), Horakova, P.,State Phytosanitary Administration, Brno (Czech Republic), Ji, L.,Hebei Agricultural University, Baoding (China)
• Format: Journal Article
• Language: English
• Published: Warsaw Polish Botanical Society 01.01.2005
• Subjects: Agar; Azoxystrobin; DINAMICA DE POBLACIONES; DYNAMIQUE DES POPULATIONS; ED 50; flusilazole; FONGICIDE; FUNGICIDAS; FUNGICIDES; http://www.fao.org/aos/agrovoc#c_25427; http://www.fao.org/aos/agrovoc#c_27261; http://www.fao.org/aos/agrovoc#c_3146; http://www.fao.org/aos/agrovoc#c_4788; http://www.fao.org/aos/agrovoc#c_6111; metconazole; METHODE; METHODS; METODOS; MYCOSPHAERELLA GRAMINICOLA; PESTICIDE RESISTANCE; Pesticides; POPULATION DYNAMICS; RESISTANCE AUX PESTICIDES; resistance to fungicides; RESISTENCIA A LOS PLAGUICIDAS; Septoria tritici; Territory; Czech Republic
• ISSN: 0065-0951; 2300-357X
• DOI: 10.5586/aa.2005.012

Reduction of colony diameter using two DMI-fungicides and one strobilurine fungicide was evaluated in the Septoria tritici population. In an in vitro assay, 57 strains of S. tritici originating from different parts of the Czech Republic were grown on agar plates containing different concentrations of fungicides. The mean EC50 values of strains were analysed for flusilazole (Capitain), metconazole (Caramba) and one strobilurine fungicide: azoxystrobin (Amistar). ED 50 values for metconazole were low. There were highly significant correlation in reaction of pathogen strains to metconazole and flusilazole. Some isolates showed significant higher level of resistance to azoxystrobin. The data will be used in a continuing survey of resistance development in the S. tritici population originating from the territory of the Czech Republic