MelampsoraV2, Main, Merge, bibRecord, 001349

Quantitative inoculation of willow rust Melampsora larici-epitea with the mycoparasite Sphaerellopsis filum (teleomorph Eudarluca caricis)

Identifieur interne : 001349 ( Main/Merge ); précédent : 001348; suivant : 001350

Quantitative inoculation of willow rust Melampsora larici-epitea with the mycoparasite Sphaerellopsis filum (teleomorph Eudarluca caricis)

Auteurs : Ming H. Pei [Royaume-Uni] ; Tom Hunter [Royaume-Uni] ; Carmen Ruiz [Royaume-Uni] ; Carlos Bayon [Royaume-Uni] ; Judy Harris [Royaume-Uni]

Source :

Mycological research : (Print) [ 0953-7562 ] ; 2003.

RBID : Pascal:03-0243359

Descripteurs français

Pascal (Inist)
- Inoculation, Lutte biologique, Disque tissu végétal, Efficacité traitement, Relation dose réponse, Inoculum, Infection, Conidie, Salix, Melampsora larici-epitea, Sphaerellopsis filum.

English descriptors

KwdEn :
- Biological control, Conidia, Dose activity relation, Infection, Inoculation, Inoculum, Plant tissue disc, Salix, Treatment efficiency.

Abstract

The mycoparasite Sphaerellopsis filum (teleomorph Eudarluca caricis) was applied simultaneously with Melampsora larici-epitea on to willow leaf discs using eight concentrations of conidia. Inoculum densities were quantified and the numbers of uredinia of the rust, pycnidia and conidia of S. filum and rust spores produced per leaf disc were measured 13 d after inoculation (first assessment). Higher S. filum inoculum densities resulted in more rust uredinia being infected, but did not reduce the number of uredinia produced. The ratios of infected rust pustules: S. filum conidia applied were in a range of 0.25-0.31 when less than 20 S. filum spores were inoculated on to a leaf disc (0.95 cm²). Suppressive effects of S. filum on rust spore production were more obvious in the second assessment, carried out 23 d after inoculation. Inoculum densities of S. filum were significantly (P<0.001) correlated with the frequency of uredinia infected (% variance accounted for [VAF] = 85.8), the number of S. filum pycnidia (%VAF=81.4), S. filum spores produced (%VAF = 72.3) and rust spore production (%VAF = 48.6). Rust spore production was significantly (P < 0.001) negatively correlated with the frequency of uredinia infected (%VAF = 51.1), the number of S. filum pycnidia (%VAF = 42.0) and the number of S. filum spores produced (%VAF = 40.6). The best correlation was found between the number of pycnidia and the number of S. filum spores produced ( %VAF = 88.8).

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Pascal:03-0243359

Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Biological control</term>
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<front><div type="abstract" xml:lang="en">The mycoparasite Sphaerellopsis filum (teleomorph Eudarluca caricis) was applied simultaneously with Melampsora larici-epitea on to willow leaf discs using eight concentrations of conidia. Inoculum densities were quantified and the numbers of uredinia of the rust, pycnidia and conidia of S. filum and rust spores produced per leaf disc were measured 13 d after inoculation (first assessment). Higher S. filum inoculum densities resulted in more rust uredinia being infected, but did not reduce the number of uredinia produced. The ratios of infected rust pustules: S. filum conidia applied were in a range of 0.25-0.31 when less than 20 S. filum spores were inoculated on to a leaf disc (0.95 cm<sup>2</sup>
). Suppressive effects of S. filum on rust spore production were more obvious in the second assessment, carried out 23 d after inoculation. Inoculum densities of S. filum were significantly (P<0.001) correlated with the frequency of uredinia infected (% variance accounted for [VAF] = 85.8), the number of S. filum pycnidia (%VAF=81.4), S. filum spores produced (%VAF = 72.3) and rust spore production (%VAF = 48.6). Rust spore production was significantly (P < 0.001) negatively correlated with the frequency of uredinia infected (%VAF = 51.1), the number of S. filum pycnidia (%VAF = 42.0) and the number of S. filum spores produced (%VAF = 40.6). The best correlation was found between the number of pycnidia and the number of S. filum spores produced ( %VAF = 88.8).</div>
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<tree><country name="Royaume-Uni"><noRegion><name sortKey="Pei, Ming H" sort="Pei, Ming H" uniqKey="Pei M" first="Ming H." last="Pei">Ming H. Pei</name>
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Quantitative inoculation of willow rust Melampsora larici-epitea with the mycoparasite Sphaerellopsis filum (teleomorph Eudarluca caricis)

Quantitative inoculation of willow rust Melampsora larici-epitea with the mycoparasite Sphaerellopsis filum (teleomorph Eudarluca caricis)

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri