“…P. teres survives over the winter in infected stubble (Jordan 1981) and Finnish P. teres populations seem to be genetically differentiated between fields (Serenius et al 2005). At least one of the farmers' fields had barley cultivation before the study year, while another field was not ploughed before barley was sown.…”
Barley leaves infected with Pyrenophora teres Drechs. f. teres were collected from farmers' fields and an experimental field for evaluation of efficacy of fungicides at MTT Agrifood Research Finland (MTT), in 2003. The aim was to test the efficacy of prochloraz to inhibit in vitro growth of P. teres. Potato dextrose agar (PDA) dishes amended with 0.1 and 1.0 μg ml -1 prochloraz were used for testing 364 isolates of P. teres based on prelimenary experiment. Isolates from MTT's experimental field were growing slower on fungicide-amended media than isolates from farmers' fields. The overall mean inhibition of radial growth was 63 and 86% on media amended with 0.1 and on 1.0 μg ml -1 prochloraz, respectively. Isolates of different origin differed significantly on growth on fungicide-amended media. The isolates capable of growing on increased concentrations of prochloraz were most commonly isolated from fields, where prochloraz was sprayed during the growing season. Within MTT's experimental field no effect of fungicide application during the growing season was observed on growth of isolates in vitro. Data from this survey was insufficient for making further conclusions regarding the effect of agricultural practices on selection of fungicide tolerant P. teres isolates. Fungicides with different types of mode of action are recommended for use together with prochloraz against the net blotch pathogen in Finland. These results are preliminary.
“…P. teres survives over the winter in infected stubble (Jordan 1981) and Finnish P. teres populations seem to be genetically differentiated between fields (Serenius et al 2005). At least one of the farmers' fields had barley cultivation before the study year, while another field was not ploughed before barley was sown.…”
Barley leaves infected with Pyrenophora teres Drechs. f. teres were collected from farmers' fields and an experimental field for evaluation of efficacy of fungicides at MTT Agrifood Research Finland (MTT), in 2003. The aim was to test the efficacy of prochloraz to inhibit in vitro growth of P. teres. Potato dextrose agar (PDA) dishes amended with 0.1 and 1.0 μg ml -1 prochloraz were used for testing 364 isolates of P. teres based on prelimenary experiment. Isolates from MTT's experimental field were growing slower on fungicide-amended media than isolates from farmers' fields. The overall mean inhibition of radial growth was 63 and 86% on media amended with 0.1 and on 1.0 μg ml -1 prochloraz, respectively. Isolates of different origin differed significantly on growth on fungicide-amended media. The isolates capable of growing on increased concentrations of prochloraz were most commonly isolated from fields, where prochloraz was sprayed during the growing season. Within MTT's experimental field no effect of fungicide application during the growing season was observed on growth of isolates in vitro. Data from this survey was insufficient for making further conclusions regarding the effect of agricultural practices on selection of fungicide tolerant P. teres isolates. Fungicides with different types of mode of action are recommended for use together with prochloraz against the net blotch pathogen in Finland. These results are preliminary.
“…The P. teres isolates obtained from Italy showed two MAT genes (1:1), suggesting that the sexual reproduction is the major influence in the population structure. On other hand, Serenius et al, (2005) observed a high variability between regions suggesting that the sexual reproduction occurs but its influence on the population structure is relative, and may be based in environmental differences. The taxonomic status of formae speciales of P. teres was proposed for reconsideration by Rau et al, (2005).…”
Section: Mating Type Locus (Mat)mentioning
confidence: 98%
“…The taxonomic status of formae speciales of P. teres was proposed for reconsideration by Rau et al, (2005). A similar study of Rau et al, (2005) and Serenius et al, (2005) was developed by Lepoint et al, (2010) with isolates of P. tritici-repentis obtained from naturally infected leaves since 1980s in wheat-growing areas worldwide. They showed that all isolates amplified to MAT gene and they highlighted some points: a) the organization of MAT gene the MAT1-1 gene is followed by the MAT1-2 gene, with both ORFs transcribed left to right; b) some strains presented one fragment as insertion between primer PtrPLP5 and PtrPLP6 (Lepoint et al, 2010) in a variable region; c) some strains of P. tritici-repentis revealed a nonspecific profile with the primer par PtMat_fw (Rau et al, 2005) and PtrPLP2 (Lepoint et al, 2010).…”
Section: Mating Type Locus (Mat)mentioning
confidence: 99%
“…The study of genetic diversity through of the mating type genes (MAT) allowed to clarify the population genetic structure of some plant pathogens fungi and provided the opportunity to evidence the sexuality reproduction in several fungi (Bennett et al, 2003;Lepoint et al, 2005Lepoint et al, , 2010Rau et al, 2005;Serenius et al, 2005).…”
Section: Mating Type Locus (Mat)mentioning
confidence: 99%
“…The mating-type genes of P. teres have been studied by different researchs (Rau et al, 2005;Serenius et al, 2005). The P. teres isolates obtained from Italy showed two MAT genes (1:1), suggesting that the sexual reproduction is the major influence in the population structure.…”
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