Use of gallic and tannic acids, sawdust and sawdust-guaiacol in laboratory tests for rot type determination of wood-decaying fungi isolated from Mexican fir
DOI:
https://doi.org/10.33885/sf.1995.3.830Keywords:
Wood-decay, Abies religiosa, Fomitopsis pinicola, Heterobasidion annosumAbstract
Part of a diagnosis on Mexican ftr wood-decay problems at the Nevado de Toluca National Park. State of Mexico,
was to determine rot-type of isolates from typical cases with three laboratory methods: the classical Baveodarnm's
test, Badcock's method, and a new sawdust-guaiacol technique. Seven isolates were brown-rollers (NT -I. NT -2,
NT-3, NT~A, NT~B. NT~C and NT-7), whereas one isolate was a white-rotter (NT-5). Only eight out of 151
repetitions gave dubious reactions, six after the Bavendamm's test, two with Badcock's method, and none with the
sawdust-guaiacol technique. Background and practical details of each method are discussed. Rot-type results were
useful for the identification of the brown-rot isolates as Fomitopsis pinicola, the white·rotter as Jleterobasidion
annosum , and also for the diagnosis of decay problems in trees.
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