Conventional many fungicidal compositions have had practical problems such that either a preventive effect or a curing effect is inadequate, the residual effect tends to be inadequate, or the controlling effect against plant diseases tends to be inadequate depending upon the application site, and a fungicidal composition to overcome such problems has been desired. The present invention provides a fungicidal composition containing an acid amide derivative of the formula (I) or a salt thereof, as an active ingredient: wherein A is phenyl which may be substituted, benzyl which may be substituted, naphthyl which may be substituted, heterocyclic ring which may be substituted, fused heterocyclic ring which may be substituted, or the like； B is heterocyclic ring which may be substituted, fused heterocyclic ring which may be substituted, or naphthyl which may be substituted； each of R1 and R2 which are independent of each other, is alkyl, or the like； R3 is hydrogen, or the like； each of W1 and W2 which are independent of each other, is oxygen or sulfur.Fungicidni sastav, naznačen time, što se sastoji od derivata acid amida formule (I) ili soli istog kao aktivni sastojak:pri čemu jeA fenil koji se.može substituisati sa X,benzodioksolanil koji se možesubstituisati sa X, ilibenzodioksanil koji se može substituisati sa X；B furil koji se može substutuisati sa Y, ilitienil koji se može substutuisati sa Y svako R1 i R2je alkil, iliR1 i R2 mogu zajedno da formiraju 3- do 6-člani saturisani carbociklični prsten；X je fluor, hlor, jod, alkil, haloalkil,alkoxi ili haloalkoksi；Y je halogen, alkil, haloalkil, alkoksi ili haloalkoksi；R3 je vodonik； isvako W1 i W2 je kiseonik.Prijava sadrži još 13 patentnih zahteva.
