Greenhouse screening of the saprophytic resident microflora for control of leaf spots of wheat (Triticum aestivum)

Ten microorganisms of the epiphytic microflora of wheat leaves in Buenos Aires Province, Argentina, were evaluated under greenhouse conditions as potential biocontrol agents of the pathogensAlternaria triticimaculans, Bipolaris sorokiniana, Drechslera tritici-repentis andSeptoria tritici in two appl...

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Detalles Bibliográficos
Autores principales: Perelló, Analía Edith, Simón, María Rosa, Arambarri, Angélica Margarita, Cordo, Cristina Alicia
Formato: Articulo
Lenguaje:Inglés
Publicado: 2001
Materias:
Botánica
Biological control
Wheat
Foliar pathogens
Phylloplane
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/132563
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-132563
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Botánica
Biological control
Wheat
Foliar pathogens
Phylloplane
spellingShingle Botánica
Biological control
Wheat
Foliar pathogens
Phylloplane
Perelló, Analía Edith
Simón, María Rosa
Arambarri, Angélica Margarita
Cordo, Cristina Alicia
Greenhouse screening of the saprophytic resident microflora for control of leaf spots of wheat (Triticum aestivum)
topic_facet Botánica
Biological control
Wheat
Foliar pathogens
Phylloplane
description Ten microorganisms of the epiphytic microflora of wheat leaves in Buenos Aires Province, Argentina, were evaluated under greenhouse conditions as potential biocontrol agents of the pathogensAlternaria triticimaculans, Bipolaris sorokiniana, Drechslera tritici-repentis andSeptoria tritici in two application sequences (prior to or together with the pathogens). The antagonists significantly reduced the expression of the diseases on wheat plants compared with control plants not inoculated with the antagonists. Maximum percentage of reduction of the necrotic lesion area (NLA) (40–55%) ofS. tritici resulted whenCryptococcus sp.,Rhodotorula rubra andPenicillium lilacinwn were sprayed on leaves prior to inoculations with the pathogen.Bacillus sp.,Cryptococcus sp.,Fusarium moniliforme var.anthophylium,P. lilacinum andR. rubra reduced significantly (34–52%) the NLA ofB. sorokiniana in both of the application sequences. The best antagonistic effect againstA. triticimaculans was shown byAspergillus niger, Bacillus sp.,Chaetomium globosum, F. moniliforme var.anthophylium andNigrospora sphaerica, with a NLA reduction from 21% to 35% in the co-inoculation or in the sequential application. All microorganisms exceptN. sphaerica performed better than the control againstD. tritici-repentis. The area under disease progress curve (AUDPC) of the pathogens appeared to progress similarly, but at lower values, in treated plants than in untreated controls. The two yeasts and the bacteria decreased AUDPC to 50–55% ofS. tritici andB. sorokiniana compared with the control in both application sequences, whereas the maximum efficacy againstA. triticimaculans was reached byN. sphaerica andA. niger for the sequential application and byF. moniliforme var.anthophylium for the co-inoculation. If the parasitism occurs also in nature, application of antagonists for biological control might provide the opportunity to compete with the pathogens and regulate their colonization in wheat leaves.
format Articulo
Articulo
author Perelló, Analía Edith
Simón, María Rosa
Arambarri, Angélica Margarita
Cordo, Cristina Alicia
author_facet Perelló, Analía Edith
Simón, María Rosa
Arambarri, Angélica Margarita
Cordo, Cristina Alicia
author_sort Perelló, Analía Edith
title Greenhouse screening of the saprophytic resident microflora for control of leaf spots of wheat (Triticum aestivum)
title_short Greenhouse screening of the saprophytic resident microflora for control of leaf spots of wheat (Triticum aestivum)
title_full Greenhouse screening of the saprophytic resident microflora for control of leaf spots of wheat (Triticum aestivum)
title_fullStr Greenhouse screening of the saprophytic resident microflora for control of leaf spots of wheat (Triticum aestivum)
title_full_unstemmed Greenhouse screening of the saprophytic resident microflora for control of leaf spots of wheat (Triticum aestivum)
title_sort greenhouse screening of the saprophytic resident microflora for control of leaf spots of wheat (triticum aestivum)
publishDate 2001
url http://sedici.unlp.edu.ar/handle/10915/132563
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