Sensitivity of Cladobotryum spp., a Pathogen of the Button Mushroom (Agaricus bisporus), to Some Fungicides

Abstract

Thirteen isolates of Cladobotryum spp., isolated from diseased fruiting bodies of Agaricus bisporus, sampled from mushroom farms in Serbia during 2003-2006, were studied. Sensitivity to several selected fungicides was tested and all isolates were found to be highly sensitive to iprodione (EC50 = 0.35-2.30 mg L-1), benomyl (EC50 = 0.14-0.97 mg L-1) and especially to prochloraz-Mn (EC50 = 0.02-0.09 mg L-1). The minimum inhibitory concentration (MIC) of benomyl was 4 mg L-1, while those of prochloraz-Mn and iprodione exceeded 1000 mg L-1. The minimum fungicide concentration (MFC) of benomyl was 4 mg L-1, and none of the tested concentrations of prochloraz-Mn and iprodione were lethal to any of the investigated Cladobotryum spp. isolates.

Trinaest izolata Cladobotryum spp., dobijeno je iz obolelih plodonosnih tela Agaricus bisporus iz gajilišta šampinjona u Srbiji tokom 2003-2006. godine. Ispitivanje osetljivosti izolata na fungicide je pokazalo da su svi izolati visoko osetljivi na benomil (EC50 = 0.14-0.97 mg L-1), iprodion (EC50 = 0.35-2.30 mg L-1) i naročito na prohloraz (EC50 = 0.02-0.09 mg L-1). Minimalna inhibitorna koncentracija (MIC) benomila je bila 4 mg L-1, a prohloraza i iprodiona veća od 1000 mg L-1. Minimalna fungicidna koncentracija (MFC) benomila je takođe bila 4 mg L-1, a nijedna od testiranih koncentracija prohloraza i iprodiona nije bila letalna za Cladobotryum spp. izolate.