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Revista mexicana de fitopatología

versión On-line ISSN 2007-8080


PEREZ-MORENO, Luis; VILLALPANDO-MENDIOLA, José Javier; CASTANEDA-CABRERA, Cecilio  y  RAMIREZ-MALAGON, Rafael. In vitro sensibility of Sclerotium rolfsii Saccardo, to fungicides commonly used for its control. Rev. mex. fitopatol [online]. 2009, vol.27, n.1, pp. 11-17. ISSN 2007-8080.

The in vitro reaction of S. rolfsii to five fungicides used for its control was evaluated. Five isolates of S. rolfsii from three localities of Guanajuato state, one from Colima and another from Morelos, Mexico were tested with the fungicides tebuconazole (1.25 g.i.a/L), thiabendazole and TCMTB (4.0 of g.i.a./L), procymidone, and iprodione (3.33 of g.i.a./L). A completely randomized experimental design with a factorial arrangement and five replications was used. Multiple mean comparison was done with Tukey's test (P < 0.05). The variables recorded were the effect of each fungicide on micelial radial growth, sclerotia production, the percentage of sclerotia viability, and vigor growth. The results showed little variability in sensitivity of isolates to the fungicides tested. The isolates displayed fungistatic effect or delayed micelial growth and reduction in number of sclerotia when treated with thiabendazole, procymidone and iprodione. Tebuconazole and TCMTB were fungicidal and inhibited mycelial growth and sclerotia production.

Palabras llave : Chemical control; southern blight; resistance; garlic; onion.

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