| abstract |
There are described carrier- and active-principle- containing fungicidal compositions which comprise, as active principle, a compound of the general formula I (the meanings of R1 to R4 are given in claim 1 and in the description). The compounds of the formula I can be termed 2,2,5,5-tetracyanotetra- and -dihydrofurans or 2,2,4,4-tetracyano-3-oxabicyclo compounds. |