Pests
Nematodes are microscopic roundworm endoparasites that feed on plant sap and cause significant yield losses. Varietal resistance is provided by genetic mechanisms that prevent pest reproduction and is assessed according to the International Seed Federation scale.
Mentioned in descriptions 13 637 varieties reference book.
Nematodes are microscopic roundworms ranging from 0.3 to 2 mm in size that act as obligate plant parasites. Most species penetrate root, stem, or bulb tissues, causing growth inhibition, wilting, and patchy crop development, with tissue damage often facilitating secondary infections.
Varietal resistance to nematodes is based on the plant's genetic apparatus, including specific R-genes that limit the feeding or reproduction of the pest. In some cases, protection is provided by a hypersensitive response, where local cell death occurs at the site of infection.
Protection efficacy is evaluated using International Seed Federation codes: HR denotes high resistance with limited parasite development under high inoculum pressure, while IR indicates intermediate resistance. The level of protection is race-specific and depends on the specific species and pathotype of the nematode.
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
hybrids between Prunus davidiana and Prunus persica
Institut National de Recherche pour l'Agriculture l'Alimentation et l'Environnement (INRAE) ^^^National Agricultural Research and Innovation Centre (NARIC)
Solanum tuberosum L. · Potato
Averis Seeds B.V.
Capsicum annuum L. · Bell pepper
Mr. J.Rusko, HU
Solanum lycopersicum L. · Tomato
MAURIZIO BACCHI
Solanum tuberosum L. · Potato
Averis Seeds B.V.
Solanum tuberosum L. · Potato
Averis Seeds B.V.
Solanum lycopersicum L. · Tomato
Seminis Vegetable Seeds
Beta vulgaris Sugar Beet Group · Sugar beet
SESVanderhave NV
Solanum tuberosum L. · Potato
Teagasc
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Capsicum annuum L. · Bell pepper
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Phacelia tanacetifolia Benth. · Lacy phacelia
PRZEDSIęBIORSTWO NASIENNE "ROLNAS" SP. Z O.O.
Solanum tuberosum L. · Potato
Danespo A/S
Solanum tuberosum L. · Potato
Averis Seeds B.V.
hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Syngenta Seeds B.V.
Solanum tuberosum L. · Potato
Winfried Lange
Solanum tuberosum L. · Potato
Kweek- en Researchbedrijf Agrico B.V.
Solanum lycopersicum L. · Tomato
Syngenta Seeds B.V.
Solanum lycopersicum L. · Tomato
Syngenta Seeds B.V.
Solanum lycopersicum L. · Tomato
HM Clause SA (FR)
Glycine max (L.) Merr. · Soybean
University of Indiana (US)
Solanum tuberosum L. · Potato
Germicopa SA (FR)
Medicago sativa L. · Alfalfa
D'EUGENIO ASVERO / D'EUGENIO ITALO / D'EUGENIO RIVO