Fungicide sensitivity of populations of wheat powdery mildew (<i>Erysiphe graminis</i> f.sp. <i>Tritici</i>) in Central Europe in 1993

Švec, Miroslav; Miklovičová, M.; Sýkora, Marek; Krippel, E.

doi:10.1002/ps.2780430107

Cited by 10 publications

(9 citation statements)

References 5 publications

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“…The large RF for triadimenol and the comparatively small RFs for the other fungicides means that the progeny with resistance to triadimenol showed reduced cross‐resistance to the other triazoles. This is consistent with results of previous studies of field populations of E. graminis (Hollomon & Butters, 1991; Švec et al ., 1995).…”

Section: Discussionmentioning

confidence: 99%

Genetic control of the resistance of Erysiphe graminis f.sp. hordei to five triazole fungicides

1998

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The genetics of resistance to ergosterol demethylation inhibitor (DMI) fungicides of the triazole (conazole) group was examined in a cross between two isolates of the barley powdery mildew fungus, Erysiphe graminis (¼ Blumeria graminis) f.sp. hordei. One isolate, E1, was previously identified as being resistant to the triazole fungicide triadimenol, while the other, HL3/5, was sensitive. The 56 progeny tested were classified into two distinct groups, either being resistant to triadimenol, like E1, or sensitive, like HL3/5. The segregation ratio was not significantly different from 1:1, consistent with responses to triadimenol being controlled by a single gene. In further tests with cyproconazole, epoxiconazole, propiconazole and tebuconazole, all the progeny classified as resistant to triadimenol were also more resistant to each of these other triazole fungicides than were any of the triadimenol-sensitive progeny. This is consistent with the triadimenol resistance allele also conferring cross-resistance to the other triazoles. The ratio between the responses of the resistant and sensitive progeny (the resistance factor, RF) was greatest for triadimenol, followed by tebuconazole, propiconazole, epoxiconazole and cyproconazole, in that order. The RF for triadimenol was much greater when the fungicide was applied as a seed treatment than when it was sprayed. Five isolates, covering the five levels of responses to triadimenol identified previously in the UK population of E. graminis f.sp. hordei, were used as standards; a triadimenol-sensitive isolate and one with the lowest level of resistance were sensitive to all four of the other fungicides, while three isolates with higher levels of triadimenol-resistance were also more resistant to the other chemicals.

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Section: Discussionmentioning

confidence: 99%

Genetic control of the resistance of Erysiphe graminis f.sp. hordei to five triazole fungicides

1998

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“…It seems that the genes Pm2+Pm6 for specific resistance are still very effective against the present population of powdery mildew on wheat in the Czech Republic. ŠVEC and MIKLOVIČOVÁ (1998) think that virulence on Pm2 dropped in central Europe. ZELLER et al (1993) quote that in European countries, genes Pm3d, Pm4b and Pm6 are more effective.…”

Section: Discussionmentioning

confidence: 99%

Reaction of winter wheat cultivars and breeding lines to Blumeria graminis f.sp. tritici

Věchet¹

2006

Plant Prot. Sci.

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VĚCHET L. (2006): Reaction of winter wheat cultivars and breeding lines to Blumeria graminis f.sp. tritici. Plant Protect. Sci., 42: 15-20.During 4 years, 27 cultivars and breeding lines of winter wheat (Triticum aestivum) were tested in small plot experiments for resistance to powdery mildew fungus. The most resistant were Frimegu, RE9607, Runal, Asset, Folke and Wasmo. The cultivars Asta (Pm2,6) and Vlasta (Pm2,6 and another not determined specific gene or minor genes of resistance) fall into resistant cultivars. It seems that the specific genes of resistance Pm2 and Pm6 are still very effective against the present Czech population of powdery mildew on wheat. Resistance of the cultivars Hereward and Tarso, having the gene of resistance Pm8, can be ascribed to an additional undetermined gene that is effective only in mature plants. The cultivars Mikon and Ramiro with partial resistance had a higher infection type and disease severity than resistant cultivars, but lower disease severity than the susceptible cultivar Kanzler.

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“…For more detailed information about virulence analysis methods see LIMPERT et al (1987) andŠVEC et al (1998).…”

Section: Methodsmentioning

confidence: 99%

Identification of genes for resistanceto wheat powdery mildew in Hungarian, Polish and Slovak wheat cultivars

Švec¹,

Szunics²,

Slovákova³

et al. 2002

Plant Prot. Sci.

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AbstractŠVEC M., SZUNICS L., MIKLOVIČOVÁ M., SLOVÁKOVÁ T., TISOVÁ V., HAUPTVOGEL P. (2002): Identification of genes for resistance to wheat powdery mildew in Hungarian, Polish and Slovak wheat cultivars. Plant Protect. Sci., 38: 64-72.The objective of the study was to identify genes for resistance to powdery mildew in wheat cultivars and land races from Poland, Slovakia and Hungary. The presence and distribution of resistance genes was compared to powdery mildew virulence structure in these countries. The different strategies in breeding for resistance were expressed in a different distribution of resistance genes, especially among Polish and Hungarian cultivars. In 20 of the 29 Hungarian common wheat cultivars the resistance gene Pm8 was found. Of the 32 Polish cultivars investigated, 16 possess a combination of genes Pm2+6. Resistance gene Pm4b did not occur in any Hungarian cultivar tested, and resistance gene pm5 was not detected in any Polish cultivar. Virulence in wheat powdery mildew populations was influenced by differences in distribution of resistance genes in host genotypes. The most significant difference was found between Polish and Hungarian powdery mildew populations. The two populations differed mainly in virulence against Pm2. Resistance gene MlAr was detected in three old Slovak cultivars.

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Fungicide sensitivity of populations of wheat powdery mildew (Erysiphe graminis f.sp. Tritici) in Central Europe in 1993

Cited by 10 publications

References 5 publications

Genetic control of the resistance of Erysiphe graminis f.sp. hordei to five triazole fungicides

Genetic control of the resistance of Erysiphe graminis f.sp. hordei to five triazole fungicides

Reaction of winter wheat cultivars and breeding lines to Blumeria graminis f.sp. tritici

Identification of genes for resistanceto wheat powdery mildew in Hungarian, Polish and Slovak wheat cultivars

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