Method for inducing viral resistance into a plant

A method for inducing resistance to a furovirus comprising a triple gene block 3 sequence with the proviso that it is not the potato virus X, in a plant cell or a plant, comprising:

• preparing a nucleic acid construct comprising:
• a nucleic acid sequence selected from the group consisting of:
• the nucleic acid sequence corresponding to a triple gene block 3 of said furovirus, its corresponding cDNA, a deletion mutant containing a 3′ truncation, wherein said deletion mutant comprises at least 70% of said nucleic acid sequence and wherein said deletion mutant has 30% or fewer of the sequences at its 3′ end deleted and retains the activity of said triple gene block 3, or a homolog or mutant wherein said homolog or mutant is 70% homologous to said nucleic acid sequence and wherein said homolog or mutant retains the activity of said triple gene block 3, said nucleic acid construct being operably linked to one or more regulatory sequence(s) active in a plant;
• and
• transforming a plant cell with the nucleic acid construct.