Abstract

Fitness costs associated with resistance to sterol biosynthesis-inhibiting fungicides (SBIs) were investigated by calculating correlations between SBI-resistance phenotypes and fitness phenotypes in Pyrenophora teres. Correlations between resistance to the SBIs triadimenol and propiconazole and two components of fitness were estimated with P. teres isolates randomly sampled from populations in North Dalcota and Bavaria, Germany. The fitness components, latent period (the time from inoculation to the first appearance of a conidium) and sporulation (total sporulation per lesion), were determined quantitatively with detached barley leaf sections inoculated with P. teres conidia in the greenhouse [...]

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