Biological control of Rhizoctonia solani in tomatoes with Trichoderma harzianum mutants

Biocontrol of Rhizoctonia solani in tomatoes cultivated under greenhouse and field conditions was analyzed using the Trichoderma harzianum mutants Th650-NG7, Th11A80.1, Th12A40.1, Th12C40.1 and Th12A10.1 and ThF2-1, respectively. Their innocuousness on tomato cultivars 92.95 and Gondola (greenhouse...

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Autores principales:	Montealegre,Jaime, Valderrama,Luis, Sánchez,Soledad, Herrera,Rodrigo, Besoain,Ximena, Pérez,Luz María
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso 2010
Materias:	bioantagonism field assays greenhouse assays root rot tomato
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000200001
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spelling	oai:scielo:S0717-345820100002000012010-04-28Biological control of Rhizoctonia solani in tomatoes with Trichoderma harzianum mutantsMontealegre,JaimeValderrama,LuisSánchez,SoledadHerrera,RodrigoBesoain,XimenaPérez,Luz María bioantagonism field assays greenhouse assays root rot tomato Biocontrol of Rhizoctonia solani in tomatoes cultivated under greenhouse and field conditions was analyzed using the Trichoderma harzianum mutants Th650-NG7, Th11A80.1, Th12A40.1, Th12C40.1 and Th12A10.1 and ThF2-1, respectively. Their innocuousness on tomato cultivars 92.95 and Gondola (greenhouse assays), and on cultivar Fortaleza (field assays) was established. Alginate pellets (1.7 g pellets/L soil) containing c.a1 x 10(5) colony forming units (cfu)/g pellet were applied to a soil previously inoculated with R. solani at transplant (greenhouse) or to a naturally infected soil (field). Controls considered parental wild strains, a chemical fungicide and no additions. Th11A 80.1, Th12A10.1 and Th650-NG7 prevented the 100% mortality of tomato plants cv. 92.95 caused by R. solani, and the 40% mortality in tomato plants cv. Gondola (greenhouse assays). Mortality reduction was reflected in canker level lessening and in plant parameters increases (development, fresh and dry weights). A different degree of susceptibility of tomato plants was observed, being Gondola cv. more resistant than 92.95 cv. to infection in a soil previously inoculated with R. solani. Tomato plants of cv. Fortaleza did not show mortality in naturally infected soils (field assays), where the mutant ThF2-1 reduced significantly the canker level caused by R. solani.info:eu-repo/semantics/openAccessPontificia Universidad Católica de ValparaísoElectronic Journal of Biotechnology v.13 n.2 20102010-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000200001en10.4067/S0717-34582010000200001
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	bioantagonism field assays greenhouse assays root rot tomato
spellingShingle	bioantagonism field assays greenhouse assays root rot tomato Montealegre,Jaime Valderrama,Luis Sánchez,Soledad Herrera,Rodrigo Besoain,Ximena Pérez,Luz María Biological control of Rhizoctonia solani in tomatoes with Trichoderma harzianum mutants
description	Biocontrol of Rhizoctonia solani in tomatoes cultivated under greenhouse and field conditions was analyzed using the Trichoderma harzianum mutants Th650-NG7, Th11A80.1, Th12A40.1, Th12C40.1 and Th12A10.1 and ThF2-1, respectively. Their innocuousness on tomato cultivars 92.95 and Gondola (greenhouse assays), and on cultivar Fortaleza (field assays) was established. Alginate pellets (1.7 g pellets/L soil) containing c.a1 x 10(5) colony forming units (cfu)/g pellet were applied to a soil previously inoculated with R. solani at transplant (greenhouse) or to a naturally infected soil (field). Controls considered parental wild strains, a chemical fungicide and no additions. Th11A 80.1, Th12A10.1 and Th650-NG7 prevented the 100% mortality of tomato plants cv. 92.95 caused by R. solani, and the 40% mortality in tomato plants cv. Gondola (greenhouse assays). Mortality reduction was reflected in canker level lessening and in plant parameters increases (development, fresh and dry weights). A different degree of susceptibility of tomato plants was observed, being Gondola cv. more resistant than 92.95 cv. to infection in a soil previously inoculated with R. solani. Tomato plants of cv. Fortaleza did not show mortality in naturally infected soils (field assays), where the mutant ThF2-1 reduced significantly the canker level caused by R. solani.
author	Montealegre,Jaime Valderrama,Luis Sánchez,Soledad Herrera,Rodrigo Besoain,Ximena Pérez,Luz María
author_facet	Montealegre,Jaime Valderrama,Luis Sánchez,Soledad Herrera,Rodrigo Besoain,Ximena Pérez,Luz María
author_sort	Montealegre,Jaime
title	Biological control of Rhizoctonia solani in tomatoes with Trichoderma harzianum mutants
title_short	Biological control of Rhizoctonia solani in tomatoes with Trichoderma harzianum mutants
title_full	Biological control of Rhizoctonia solani in tomatoes with Trichoderma harzianum mutants
title_fullStr	Biological control of Rhizoctonia solani in tomatoes with Trichoderma harzianum mutants
title_full_unstemmed	Biological control of Rhizoctonia solani in tomatoes with Trichoderma harzianum mutants
title_sort	biological control of rhizoctonia solani in tomatoes with trichoderma harzianum mutants
publisher	Pontificia Universidad Católica de Valparaíso
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000200001
work_keys_str_mv	AT montealegrejaime biologicalcontrolofrhizoctoniasolaniintomatoeswithtrichodermaharzianummutants AT valderramaluis biologicalcontrolofrhizoctoniasolaniintomatoeswithtrichodermaharzianummutants AT sanchezsoledad biologicalcontrolofrhizoctoniasolaniintomatoeswithtrichodermaharzianummutants AT herrerarodrigo biologicalcontrolofrhizoctoniasolaniintomatoeswithtrichodermaharzianummutants AT besoainximena biologicalcontrolofrhizoctoniasolaniintomatoeswithtrichodermaharzianummutants AT perezluzmaria biologicalcontrolofrhizoctoniasolaniintomatoeswithtrichodermaharzianummutants
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Biological control of Rhizoctonia solani in tomatoes with Trichoderma harzianum mutants

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