Seven N-aryl-5,6-dihydro-3-methyl-1,4-dioxin-2-carboxamides were prepared as potential fungicides.The fungicidal activity of the dioxincarboxamides was evaluated against bean rust, a major disease of cereal crops.Structure-activity relationships for the screened compounds are discussed.The fungicidal activity of the dioxincarboxamides is correlated with that of the structurally similar com. fungicide, carboxin.