Distribution and prevalence of crown rot pathogens affecting wheat crops in southern Chile

Crown rot pathogens are associated with higher losses for wheat crop farmers, but information about the distribution and prevalence of these pathogens in Chile is inadequate. Distribution and prevalence of wheat (Triticum aestivum L.) crown rot pathogens were examined in a survey of 48 commercial fi...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Moya-Elizondo,Ernesto, Arismendi,Nolberto, Castro,María Paz, Doussoulin,Herman
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2015
Materias:	Fusarium crown rot soilborne diseases survey take-all, Triticum aestivum wheat diseases
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392015000100011
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0718-58392015000100011
record_format	dspace
spelling	oai:scielo:S0718-583920150001000112018-10-01Distribution and prevalence of crown rot pathogens affecting wheat crops in southern ChileMoya-Elizondo,ErnestoArismendi,NolbertoCastro,María PazDoussoulin,Herman Fusarium crown rot soilborne diseases survey take-all, Triticum aestivum wheat diseases Crown rot pathogens are associated with higher losses for wheat crop farmers, but information about the distribution and prevalence of these pathogens in Chile is inadequate. Distribution and prevalence of wheat (Triticum aestivum L.) crown rot pathogens were examined in a survey of 48 commercial fields from December 2011 to February 2012 in southern Chile. These fields were located between Collipulli (37°56’00" S; 72°26’39" W) and Purranque (40°50’30" S; 73°22’03" W). Severity of crown rot disease was determined through visual assessment of the first internode of 20 tillers obtained from each field. Incidence of crown rot pathogens per field was determined by plating the 20 tillers on Petri plates with 20% potato dextrose agar amended with lactic acid (aPDA) medium. Resulting fungal colonies from monoxenic culture were identified by morphological or molecular-assisted identification. Severity of crown rot varied between 11.3% and 80% for individual fields. Culture plate analysis showed 72.2% of stems were infected with some fungus. Fusarium avenaceum, F. graminearum, and F. culmorum, pathogens associated with Fusarium crown rot disease were isolated from 13.5% of tillers. Gaeumannomyces graminis, causal agent of take-all disease in cereals, was isolated from 11.1% of culms. Phaeosphaeria sp., an endophyte and possibly a non-pathogenic fungus, was isolated from 13.9% of tillers. Pathogenic fungi such as Rhizoctonia spp. and Microdochium nivale, other saprophyte, and several unidentified non-sporulating fungi were isolated at frequencies lower than 3% of the total. Fusarium crown rot and take-all were the most prevalent and distributed crown rot diseases present in wheat crops in southern Chile.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.75 n.1 20152015-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392015000100011en10.4067/S0718-58392015000100011
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Fusarium crown rot soilborne diseases survey take-all, Triticum aestivum wheat diseases
spellingShingle	Fusarium crown rot soilborne diseases survey take-all, Triticum aestivum wheat diseases Moya-Elizondo,Ernesto Arismendi,Nolberto Castro,María Paz Doussoulin,Herman Distribution and prevalence of crown rot pathogens affecting wheat crops in southern Chile
description	Crown rot pathogens are associated with higher losses for wheat crop farmers, but information about the distribution and prevalence of these pathogens in Chile is inadequate. Distribution and prevalence of wheat (Triticum aestivum L.) crown rot pathogens were examined in a survey of 48 commercial fields from December 2011 to February 2012 in southern Chile. These fields were located between Collipulli (37°56’00" S; 72°26’39" W) and Purranque (40°50’30" S; 73°22’03" W). Severity of crown rot disease was determined through visual assessment of the first internode of 20 tillers obtained from each field. Incidence of crown rot pathogens per field was determined by plating the 20 tillers on Petri plates with 20% potato dextrose agar amended with lactic acid (aPDA) medium. Resulting fungal colonies from monoxenic culture were identified by morphological or molecular-assisted identification. Severity of crown rot varied between 11.3% and 80% for individual fields. Culture plate analysis showed 72.2% of stems were infected with some fungus. Fusarium avenaceum, F. graminearum, and F. culmorum, pathogens associated with Fusarium crown rot disease were isolated from 13.5% of tillers. Gaeumannomyces graminis, causal agent of take-all disease in cereals, was isolated from 11.1% of culms. Phaeosphaeria sp., an endophyte and possibly a non-pathogenic fungus, was isolated from 13.9% of tillers. Pathogenic fungi such as Rhizoctonia spp. and Microdochium nivale, other saprophyte, and several unidentified non-sporulating fungi were isolated at frequencies lower than 3% of the total. Fusarium crown rot and take-all were the most prevalent and distributed crown rot diseases present in wheat crops in southern Chile.
author	Moya-Elizondo,Ernesto Arismendi,Nolberto Castro,María Paz Doussoulin,Herman
author_facet	Moya-Elizondo,Ernesto Arismendi,Nolberto Castro,María Paz Doussoulin,Herman
author_sort	Moya-Elizondo,Ernesto
title	Distribution and prevalence of crown rot pathogens affecting wheat crops in southern Chile
title_short	Distribution and prevalence of crown rot pathogens affecting wheat crops in southern Chile
title_full	Distribution and prevalence of crown rot pathogens affecting wheat crops in southern Chile
title_fullStr	Distribution and prevalence of crown rot pathogens affecting wheat crops in southern Chile
title_full_unstemmed	Distribution and prevalence of crown rot pathogens affecting wheat crops in southern Chile
title_sort	distribution and prevalence of crown rot pathogens affecting wheat crops in southern chile
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392015000100011
work_keys_str_mv	AT moyaelizondoernesto distributionandprevalenceofcrownrotpathogensaffectingwheatcropsinsouthernchile AT arismendinolberto distributionandprevalenceofcrownrotpathogensaffectingwheatcropsinsouthernchile AT castromariapaz distributionandprevalenceofcrownrotpathogensaffectingwheatcropsinsouthernchile AT doussoulinherman distributionandprevalenceofcrownrotpathogensaffectingwheatcropsinsouthernchile
_version_	1714205343856197632

Distribution and prevalence of crown rot pathogens affecting wheat crops in southern Chile

Ejemplares similares