A new disease of wheat caused by Alternaria triticimaculans in Argentina

Late maturity wheat plants (Triticum aestivum L) culivars Trigomax and Buck Poncho growing at the Estación Experimental Agropecuaria J Hirschhorn in Los Hornos (Provincia de Buenos Aires) were severely affected by a previously undescribed disease. The leaves initially showed necrotic, irregular brow...

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Detalles Bibliográficos
Autores principales: Perelló, Analía Edith, Cordo, Cristina Alicia, Simón, María Rosa
Formato: Articulo
Lenguaje:Inglés
Publicado: 1996
Materias:
Ciencias Agrarias
Alternaria leaf blight
Wheat
Triticum aestivum
Alternaria triticimaculans
Trigo
Tizón de la hoja
Triticum
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/123066
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-123066
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Agrarias
Alternaria leaf blight
Wheat
Triticum aestivum
Alternaria triticimaculans
Trigo
Tizón de la hoja
Triticum
spellingShingle Ciencias Agrarias
Alternaria leaf blight
Wheat
Triticum aestivum
Alternaria triticimaculans
Trigo
Tizón de la hoja
Triticum
Perelló, Analía Edith
Cordo, Cristina Alicia
Simón, María Rosa
A new disease of wheat caused by Alternaria triticimaculans in Argentina
topic_facet Ciencias Agrarias
Alternaria leaf blight
Wheat
Triticum aestivum
Alternaria triticimaculans
Trigo
Tizón de la hoja
Triticum
description Late maturity wheat plants (Triticum aestivum L) culivars Trigomax and Buck Poncho growing at the Estación Experimental Agropecuaria J Hirschhorn in Los Hornos (Provincia de Buenos Aires) were severely affected by a previously undescribed disease. The leaves initially showed necrotic, irregular brown/grey spots that progressed to general necrosis and death of the leaf. The pathogen was proposed as a new species: Alternaria triticimaculans Simmons and Perroló in 1994. Disease symptomatology and characteristics of the causal agent on potato dextrose agar are described. Eight wheat cultivars exhibited significant differences in disease severity in the field under natural infection with A triticimaculans. Don Ernesto INTA was the most resistant and Pro INTA Isla Verde the most susceptible. Five greenhouse-grown wheat cultivars were inoculated by spraying young and adult plants with conidia of A triticimaculans. Lesions similar to those observed on naturally infected plants were observed. The fungus was reisolated from all inoculated plants and Koch’s postulates were fulfilled. Adult plants were more susceptible to the pathogen than younger ones. Inoculations made on disinfected wheat seeds indicated slightly reduced seedling emergence. This is the first reported ocurrence of A triticimaculans on a cultivated plant.
format Articulo
Articulo
author Perelló, Analía Edith
Cordo, Cristina Alicia
Simón, María Rosa
author_facet Perelló, Analía Edith
Cordo, Cristina Alicia
Simón, María Rosa
author_sort Perelló, Analía Edith
title A new disease of wheat caused by Alternaria triticimaculans in Argentina
title_short A new disease of wheat caused by Alternaria triticimaculans in Argentina
title_full A new disease of wheat caused by Alternaria triticimaculans in Argentina
title_fullStr A new disease of wheat caused by Alternaria triticimaculans in Argentina
title_full_unstemmed A new disease of wheat caused by Alternaria triticimaculans in Argentina
title_sort new disease of wheat caused by alternaria triticimaculans in argentina
publishDate 1996
url http://sedici.unlp.edu.ar/handle/10915/123066
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