Compatibility of Talaromyces flavus with potato seedpiece fungicides |
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| Authors: | DR Fravel JJ Marois MT Dunn GC Papavizas |
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| Institution: | 1. Department of Botany, University of Maryland, College Park, MD 20742 U.S.A.;2. U.S. Department of Agriculture, ARS, Soilborne Diseases Laboratory, Plant Protection Institute, Beltsville, MD 20705, U.S.A. |
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| Abstract: | The compatibility of conidia and ascospores of a wild-type isolate (TF1) and a benomyl-resistant biotype (TF1-1) of Talaromyces flavus with five fungicides recommended for use on potato seedpieces was investigated in the field and in vitro. The fungicides tested were captan, mancozeb, maneb, metiram and thiabendazole. In the field test, highest populations were recovered from TF1 treatments. Both the TF1 and the TF1-1 survived better in the field and were more tolerant of more fungicides when applied to the potato seedpieces as ascospores than as conidia. In the field, both fungi were most tolerant of thiabendazole and metiram and least tolerant of captan. Tolerance of fungicides in vitro was not consistent with field compatibility. |
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