Efficacy of chemical and biological strategies for controlling the soybean brown spot (Septoria glycines)

Soybean {Glycine max) is currently the most widely grown and rapidly expanding crop in Argentina, and brown spot caused by Septoria glycines is a major foliage disease that affects this crop. Triáis in the 2005 and 2006 growing seasons were undertaken using soybean (Glycine max) cv. Nidera A4800 RR....

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Autor principal:	Mantecón,Jorge D
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal 2008
Materias:	Bacillus chemical and biological control brown spot diseases fungicides soybean
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202008000200011
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spelling	oai:scielo:S0718-162020080002000112008-11-18Efficacy of chemical and biological strategies for controlling the soybean brown spot (Septoria glycines)Mantecón,Jorge D Bacillus chemical and biological control brown spot diseases fungicides soybean Soybean {Glycine max) is currently the most widely grown and rapidly expanding crop in Argentina, and brown spot caused by Septoria glycines is a major foliage disease that affects this crop. Triáis in the 2005 and 2006 growing seasons were undertaken using soybean (Glycine max) cv. Nidera A4800 RR. A randomized complete block design was used with four replicates. Two biological fungicides, based on Bacillus subtilis or B. pumilus, and four conventional fungicides, pyraclostrobin in combination with epoxiconazole (Opera 25 SC, BASF Argentina), azoxystrobin (Amistar 25 SC, Syngenta Argentina), trifloxystrobin in combination with cyproconazole (Sphere 267,5 EC, Bayer, Argentina), and tebuconazole (Folicur 25 EC, Bayer, Argentina), were evaluated. Fungicides were applied at the R3 stage of soybean development. The effectiveness of the fungicide was determined by measuring disease incidence and severity High doses of biological fungicides and all chemical treatments reduced the incidence of disease compared to the untreated control, but only Bacillus subtilis QST 713 at a high dose showed a similar efficacy for reducing disease severity. The best results for reducing disease incidence and severity were obtained with the strobilurin fungicides pyraclostrobin plus epoxiconazole, trifloxystrobin plus cyproconazole, and azoxystrobin. The best yields were obtained with chemical and biological treatments at high doses applied at R3; these treatments appeared to have a direct relationship with reduced development of foliar symptoms.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalCiencia e investigación agraria v.35 n.2 20082008-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202008000200011en10.4067/S0718-16202008000200011
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Bacillus chemical and biological control brown spot diseases fungicides soybean
spellingShingle	Bacillus chemical and biological control brown spot diseases fungicides soybean Mantecón,Jorge D Efficacy of chemical and biological strategies for controlling the soybean brown spot (Septoria glycines)
description	Soybean {Glycine max) is currently the most widely grown and rapidly expanding crop in Argentina, and brown spot caused by Septoria glycines is a major foliage disease that affects this crop. Triáis in the 2005 and 2006 growing seasons were undertaken using soybean (Glycine max) cv. Nidera A4800 RR. A randomized complete block design was used with four replicates. Two biological fungicides, based on Bacillus subtilis or B. pumilus, and four conventional fungicides, pyraclostrobin in combination with epoxiconazole (Opera 25 SC, BASF Argentina), azoxystrobin (Amistar 25 SC, Syngenta Argentina), trifloxystrobin in combination with cyproconazole (Sphere 267,5 EC, Bayer, Argentina), and tebuconazole (Folicur 25 EC, Bayer, Argentina), were evaluated. Fungicides were applied at the R3 stage of soybean development. The effectiveness of the fungicide was determined by measuring disease incidence and severity High doses of biological fungicides and all chemical treatments reduced the incidence of disease compared to the untreated control, but only Bacillus subtilis QST 713 at a high dose showed a similar efficacy for reducing disease severity. The best results for reducing disease incidence and severity were obtained with the strobilurin fungicides pyraclostrobin plus epoxiconazole, trifloxystrobin plus cyproconazole, and azoxystrobin. The best yields were obtained with chemical and biological treatments at high doses applied at R3; these treatments appeared to have a direct relationship with reduced development of foliar symptoms.
author	Mantecón,Jorge D
author_facet	Mantecón,Jorge D
author_sort	Mantecón,Jorge D
title	Efficacy of chemical and biological strategies for controlling the soybean brown spot (Septoria glycines)
title_short	Efficacy of chemical and biological strategies for controlling the soybean brown spot (Septoria glycines)
title_full	Efficacy of chemical and biological strategies for controlling the soybean brown spot (Septoria glycines)
title_fullStr	Efficacy of chemical and biological strategies for controlling the soybean brown spot (Septoria glycines)
title_full_unstemmed	Efficacy of chemical and biological strategies for controlling the soybean brown spot (Septoria glycines)
title_sort	efficacy of chemical and biological strategies for controlling the soybean brown spot (septoria glycines)
publisher	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202008000200011
work_keys_str_mv	AT manteconjorged efficacyofchemicalandbiologicalstrategiesforcontrollingthesoybeanbrownspotseptoriaglycines
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Efficacy of chemical and biological strategies for controlling the soybean brown spot (Septoria glycines)

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