The present invention provides a novel plant engineered to have a broad spectrum of resistance to plant virus infection by transforming the plant with a polynucleotide construct having an RNA dependant RNA polymerase 6 operably linked to a promoter sequence to allow expression of RNA dependant RNA polymerase 6 in the plant. Also disclosed is a method for conferring on a plant resistance to a broad spectrum of plant virus infection by transforming the plant with a polynucleotide construct having an RNA dependant RNA polymerase 6 operably linked to a promoter sequence.