In:
Journal of Phytopathology, Wiley, Vol. 162, No. 7-8 ( 2014-08), p. 442-448
Abstract:
Sensitivity of 159 isolates of Z ymoseptoria tritici collected from durum wheat fields in Tunisia in 2012 was analysed towards pyraclostrobin, fluxapyroxad, epoxiconazole, metconazole, prochloraz and tebuconazole using microtiter tests. All isolates were found to be highly sensitive to pyraclostrobin with EC 50 〈 0.01 mg/l with the exception of three isolates from the same field with higher EC 50 values ( 〉 0.5 mg/l). These three isolates carried a mutation in the cytochrome b gene encoding the G143A substitution. This is the first report of quinone outside inhibitors (QoI) resistance in Z. tritici in Tunisia. Sensitivity towards r fluxapyroxad was in a narrow range with EC 50 values ranging between 0.013 and 0.125 mg/l, which can serve as baseline sensitivity data for the future. Demethylation inhibitors sensitivity varied across a broad range with the data indicating a slight shift in sensitivity when compared to a previous study on the 2010 population. No highly sensitive strains were isolated from samples from fields, which had received three or four DMI applications.
Type of Medium:
Online Resource
ISSN:
0931-1785
,
1439-0434
DOI:
10.1111/jph.2014.162.issue-7-8
Language:
English
Publisher:
Wiley
Publication Date:
2014
detail.hit.zdb_id:
2020539-9
SSG:
12
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