Abstract: The present invention relates to combinations of a fungicidal triazole, or a salt thereof, and a pyrion compound, or a salt thereof, which provide an improved biocidal effect. More particularly, the present invention relates to compositions comprising a combination of a fungicidal triazole, or a salt thereof, selected from the group consisting of azaconazole, bromuconazole, cyproconazole, difenoconazole, epoxiconazole, fenbuconazole, fluquinconazole, flusilazole, hexaconazole, ipconazole, metconazole, penconazole, propiconazole, prothioconazole, simeconazole, tebuconazole, tetraconazole, and triticonazole, together with a pyrion compound selected from 1-hydroxy-2-pyridinone, ciclopirox, ciclopirox olamine, piroctone, piroctone olamine, rilopirox and pyrion disulfide in respective proportions to provide a synergistic biocidal effect.