Compounds of Formula I, and their N-oxides and agriculturally suitable salts, are disclosed which are useful as fungicides ##STR1## wherein W is O, S(O).sub.n or NR.sup.5 ;n is 0, 1 or 2;Q is O or S;G is a fused phenyl, naphthalene, thiophene, furan, pyrrole, pyridine, thiazole, oxazole, imidazole, pyrazine, pyridazine or pyrimidine ring; andR.sup.1 -R.sup.5 are as defined in the disclosure.Also disclosed are compositions containing the compounds of Formula I and a method for controlling plant diseases caused by fungal plant pathogens which involves applying an effective amount of a compound of Formula I.