Importance of potato late blight in Argentina, and the effect of fungicide treatments on yield increments over twenty years

Late blight (Phytophthora infestans) is the most destructive fungal disease of potato (Solanum tuberosum) in Argentina, reducing yields considerably. During the 1986-2005 growing seasons, fungicide treatments to control potato late blight were performed using mancozeb (Dithane M80 WP, Dow AgroScienc...

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Autor principal:	Mantecón,Jorge D
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal 2009
Materias:	Chemical control late blight Phytophthora infestans potato potato diseases Solanum yield increases
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000100011
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spelling	oai:scielo:S0718-162020090001000112009-04-29Importance of potato late blight in Argentina, and the effect of fungicide treatments on yield increments over twenty yearsMantecón,Jorge D Chemical control late blight Phytophthora infestans potato potato diseases Solanum yield increases Late blight (Phytophthora infestans) is the most destructive fungal disease of potato (Solanum tuberosum) in Argentina, reducing yields considerably. During the 1986-2005 growing seasons, fungicide treatments to control potato late blight were performed using mancozeb (Dithane M80 WP, Dow AgroScience Argentina, 1986-2005) every 7 d, metalaxil+mancozeb (Ridomil MZ 72 WP, Syngenta Agro Argentina, 1986-1995) every 14 d, and mefenoxam+mancozeb (Ridomil Gold 68 WP, 1996-2005) every 7 d. Blight severity was rated five times each season on the basis of the percentage of diseased foliage caused by late blight. Five visual assessments of infection were used to calcúlate the area under the disease-progress curve (AUDPC, foliar blight x day). Marketable (>60 g) potatoes and total tuber yields were recorded each growing season. Late blight was prevalent and severe each year, reducing yields significantly particularly for marketable tubers. The average yields increased on fungicide treated plots was 41.8% for marketable tubers and 35.6% for total potato yields. Under the climatic conditions of southwest Argentina, total crop loss on non fungicide treated plots was not obtained in 20 years; therefore late blight was not a completely limiting factor for potato production. However, fungicide treatment appears to be essential to obtain high quality yields.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalCiencia e investigación agraria v.36 n.1 20092009-04-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000100011en10.4067/S0718-16202009000100011
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Chemical control late blight Phytophthora infestans potato potato diseases Solanum yield increases
spellingShingle	Chemical control late blight Phytophthora infestans potato potato diseases Solanum yield increases Mantecón,Jorge D Importance of potato late blight in Argentina, and the effect of fungicide treatments on yield increments over twenty years
description	Late blight (Phytophthora infestans) is the most destructive fungal disease of potato (Solanum tuberosum) in Argentina, reducing yields considerably. During the 1986-2005 growing seasons, fungicide treatments to control potato late blight were performed using mancozeb (Dithane M80 WP, Dow AgroScience Argentina, 1986-2005) every 7 d, metalaxil+mancozeb (Ridomil MZ 72 WP, Syngenta Agro Argentina, 1986-1995) every 14 d, and mefenoxam+mancozeb (Ridomil Gold 68 WP, 1996-2005) every 7 d. Blight severity was rated five times each season on the basis of the percentage of diseased foliage caused by late blight. Five visual assessments of infection were used to calcúlate the area under the disease-progress curve (AUDPC, foliar blight x day). Marketable (>60 g) potatoes and total tuber yields were recorded each growing season. Late blight was prevalent and severe each year, reducing yields significantly particularly for marketable tubers. The average yields increased on fungicide treated plots was 41.8% for marketable tubers and 35.6% for total potato yields. Under the climatic conditions of southwest Argentina, total crop loss on non fungicide treated plots was not obtained in 20 years; therefore late blight was not a completely limiting factor for potato production. However, fungicide treatment appears to be essential to obtain high quality yields.
author	Mantecón,Jorge D
author_facet	Mantecón,Jorge D
author_sort	Mantecón,Jorge D
title	Importance of potato late blight in Argentina, and the effect of fungicide treatments on yield increments over twenty years
title_short	Importance of potato late blight in Argentina, and the effect of fungicide treatments on yield increments over twenty years
title_full	Importance of potato late blight in Argentina, and the effect of fungicide treatments on yield increments over twenty years
title_fullStr	Importance of potato late blight in Argentina, and the effect of fungicide treatments on yield increments over twenty years
title_full_unstemmed	Importance of potato late blight in Argentina, and the effect of fungicide treatments on yield increments over twenty years
title_sort	importance of potato late blight in argentina, and the effect of fungicide treatments on yield increments over twenty years
publisher	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000100011
work_keys_str_mv	AT manteconjorged importanceofpotatolateblightinargentinaandtheeffectoffungicidetreatmentsonyieldincrementsovertwentyyears
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Importance of potato late blight in Argentina, and the effect of fungicide treatments on yield increments over twenty years

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