RESUMEN
Macrophomina phaseolina mycelium in vitro was most sensitive to and almost equally inhibited by benzimidazole fungicides banomyl, thiabendazole and thiophanate methyl, intermediately sensitive to pentachloronitrobenzene [PCNB], carboxin and thiram and least sensitive to 3-hydroxy-5-methyl isoxazole, triforine, captan and 5-ethexy-3-[trichloromethyl]-1,2,4-thiadiazole [ETMT]. Benomyl was most effective in reducing M. phaseolina sclerotial populations in the field, and soybean seedling infection in the greenhouse and field. Thiabendazole was quantitatively less effective than benomyl in reducing sclerotial populations. Benomyl and PCNB showed phytotoxicity by reducing emergence and st and. Thiabendazole and benomyl, in spite of its phytotoxicity, were the most promising fungicides for control of charcoal rot