Anthracnose is one of the most serious banana post-harvest diseases. A total of 25 <span name="style_italic">Colletotrichum</span> isolates were obtained from banana fruits grown in 5 areas in Turrialba County, Costa Rica; 5 isolates per area. Isolates were characterized on the basis of polymerase chain reaction (PCR) using species-specific primers of the ITS region and ß-tubulin, gene, and their in vitro sensitivities to the fungicides thiabendazole, imazalil and myclobutanil at 0.1, 1.0, 10.0 y 100.0 µg.ml<span name="style_sup">-1</span>. All isolates were identified as <span name="style_italic">Colletotrichum</span> gloeosporioides and were sensitive to thiabendazole, whereas most isolates showed a marked reduction in sensitivity to imazalil and myclobutanil. gloeosporioides and were sensitive to thiabendazole, whereas most isolates showed a marked reduction in sensitivity to imazalil and myclobutanil.

Anthracnose; PCR; postharvest; thiabendazole; imazalil; miclobutanil