[EN] The plant nursery industry has become an ideal reservoir for Phytophthora species and other soilborne pathogens. In this context, isolation from tissues and soil of ornamental and forest plants from nurseries in four ...
[EN] Composed of a naked circular non-protein-coding genomic RNA, counting only a few hundred nucleotides, viroids¿the smallest infectious agents known so far¿are able to replicate and move systemically in herbaceous and ...