Titre:	Effect of organic amendments on sclerotial germination, mycelial growth, and Sclerotium rolfsii-induced diseases
Autre(s) titre(s):	Efeitos de resíduos orgânicos no solo na germinação de esclerócios, no crescimento micelial e na ocorrência de doenças induzidas por Sclerotium rolfsii
Auteur(s):	Blum, Luiz Eduardo Bassay Rodríguez-Kábana, Rodrigo
Assunto::	Soja - doenças e pragas Tomate - doenças e pragas Resíduos orgânicos Controle biológico Solos supressivos
Date de publication:	fév-2004
Editeur:	Sociedade Brasileira de Fitopatologia
Référence bibliographique:	BLUM, Luiz E. B.; RODRÍGUEZ-KÁBANA, Rodrígo. Effect of organic amendments on sclerotial germination, mycelial growth, and Sclerotium rolfsii-induced diseases. Fitopatologia Brasileira, v. 29, n. 1, p. 66-74, jan./fev., 2004. DOI: https://doi.org/10.1590/S0100-41582004000100010. Disponível: https://www.scielo.br/j/fb/a/56r7twNB3qc6t78Db5Jsbtp/?lang=en#. Acesso em: 10 set. 2021.
Abstract:	The addition of organic residues to soil is an option to control some soil-borne diseases. Benzaldehyde and powders of kudzu (Pueraria lobata), velvetbean (Mucuna deeringiana), and pine-bark (Pinus elliottii and P. taeda) added to soil could reduce certain soil-borne diseases. This study evaluated the effects of benzaldehyde and the dried powders of kudzu, velvetbean, and pine-bark as soil amendments on germination and formation of sclerotia, on mycelial growth of Sclerotium rolfsii, on plant survival, and disease incidence. The data showed that high amounts of benzaldehyde (0.4 ml kg-1 of soil) and velvetbean (100 g kg-1) inhibited S. rolfsii mycelial growth and sclerotium germination. However, low amounts of benzaldehyde (0.1 ml kg-1), kudzu (25 g kg-1), and pine-bark (25 g kg-1) stimulated mycelial growth and sclerotium germination. Kudzu (25-100 g kg-1) and velvetbean (25-100 g kg-1) inhibited the formation of sclerotia. Nevertheless, benzaldehyde at 0.2 and 0.4 ml kg-1 stimulated the formation of sclerotia. Kudzu (50 and 100 g kg-1) and pine-bark (50 g kg-1) favored the colonization of sclerotia by Trichoderma sp. The numbers of soybean (Glycine max) plants were higher and diseased plants were lower than the non-amend soil in the following treatments: kudzu (50 and 100 g kg-1), velvetbean (50 and 100 g kg-1), and pine-bark (50 g kg-1). Disease severity on tomato (Lycopersicon esculentum) plants was low in soil treated with kudzu or velvetbean (30 and 35 g kg-1) and pine-bark (35 g kg-1). Dried powders of kudzu, velvetbean, or pine-bark added to soil can reduce disease by reducing pathogen inoculum. The addition of organic residues to soil is an option to control some soil-borne diseases. Benzaldehyde and powders of kudzu (Pueraria lobata), velvetbean (Mucuna deeringiana), and pine-bark (Pinus elliottii and P. taeda) added to soil could reduce certain soil-borne diseases. This study evaluated the effects of benzaldehyde and the dried powders of kudzu, velvetbean, and pine-bark as soil amendments on germination and formation of sclerotia, on mycelial growth of Sclerotium rolfsii, on plant survival, and disease incidence. The data showed that high amounts of benzaldehyde (0.4 ml kg-1 of soil) and velvetbean (100 g kg-1) inhibited S. rolfsii mycelial growth and sclerotium germination. However, low amounts of benzaldehyde (0.1 ml kg-1), kudzu (25 g kg-1), and pine-bark (25 g kg-1) stimulated mycelial growth and sclerotium germination. Kudzu (25-100 g kg-1) and velvetbean (25-100 g kg-1) inhibited the formation of sclerotia. Nevertheless, benzaldehyde at 0.2 and 0.4 ml kg-1 stimulated the formation of sclerotia. Kudzu (50 and 100 g kg-1) and pine-bark (50 g kg-1) favored the colonization of sclerotia by Trichoderma sp. The numbers of soybean (Glycine max) plants were higher and diseased plants were lower than the non-amend soil in the following treatments: kudzu (50 and 100 g kg-1), velvetbean (50 and 100 g kg-1), and pine-bark (50 g kg-1). Disease severity on tomato (Lycopersicon esculentum) plants was low in soil treated with kudzu or velvetbean (30 and 35 g kg-1) and pine-bark (35 g kg-1). Dried powders of kudzu, velvetbean, or pine-bark added to soil can reduce disease by reducing pathogen inoculum.
Licença::	Fitopatologia Brasileira - This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY NC). Fonte: https://www.scielo.br/j/fb/a/56r7twNB3qc6t78Db5Jsbtp/?lang=en#. Acesso em: 10 set. 2021.
DOI:	https://dx.doi.org/10.1590/S0100-41582004000100010
Collection(s) :	Artigos publicados em periódicos e afins

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