Antagonism of saprobe fungi from semiarid areas of the Northeast of Brazil against Sclerotinia sclerotiorum and biocontrol of soybean white mold

Autor(es)

Peitl, Douglas Casaroto ^[1] ; Sumida, Ciro Hideki ^[2] ; Goncalves, Ricardo Marcelo ^[3] ; Pascholati, Sergio Florentino ^[4] ; Balbi-Pena, Maria Isabel ^[3]

Afiliação do(s) autor(es)

^[1] Univ Estadual Londrina, Curso Mestrado, Programa Posgrad Agron, Londrina, Parana - Brazil

^[2] Univ Estadual Londrina, Dept Agron, Londrina, Parana - Brazil

^[3] Univ Estadual Londrina, Programa Posgrad Agron, Londrina, Parana - Brazil

^[4] Univ Sao Paulo, Escola Super Agr Luiz de Queiroz, Dept Fitopatol & Nematol, Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: SEMINA-CIENCIAS AGRARIAS; v. 41, n. 6, p. 2597-2611, NOV-DEC 2020.
• Citações Web of Science: 0

Resumo

The antagonistic activity of 25 saprobe fungi from semiarid areas of the Northeast of Brazil was evaluated against Sclerotinia sclerotiorum (Lib.) de Bary (Helotiales: Sclerotiniaceae). Four fungi {[}Myrothecium sp. Tode (Hypocreales: Stachybotryaceae) isolate 2, Volutella minima Hohn. (Hypocreales: Nectriaceae), Phialomyces macrosporus P.C. Misra \& P.H.B. Talbot (Pezizomycotina) and Dictyosporium tetraseriale Goh, Yanna \& K.D. Hyde (Pleosporales: Dictyosporiaceae)] were selected and further tested their ability to inhibit mycelial growth, sclerotia formation and ascospore germination of S. sclerotiorum and to control white mold on soybean plants. V. minima and P. macrosporus filtrates at 50% effectively suppressed mycelial growth and Myrothecium sp. isolate 2 completely suppressed sclerotia formation and inhibited ascospore germination by over 95%, the same result as commercial fungicide fluazinam. Soybean plants pre-treated with Myrothecium sp. isolate 2, P. macrosporus, and V. minima and inoculated with S. sclerotiorum showed a reduction of 55.8%, 79.7%, and 83.2% of area under disease progress curve (AUDPC) of white mold, respectively, in relation to water. Collectively, these results underline the antagonistic activity of V. minima, P. macrosporus, and Myrothecium sp. isolate 2 against S. sclerotiorum and their potential as biocontrol agents of soybean white mold. (AU)

• Processo FAPESP: 10/52343-0 - Bioprospecção de fungos sapróbios no PPBIO/ semi-árido nordestino para o controle de doenças infecciosas em plantas: indução de resistência
• Beneficiário: Sérgio Florentino Pascholati
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Regular