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.
Triticum durum Desf. · Durum wheat
North Dakota State University (US)
Capsicum annuum L. · Bell pepper
CAPITAL GENETIC EBT, S.L.
Solanum tuberosum L. · Potato
Lietuvos agrarinių ir miškų mokslų centro Vokės filialas
Prunus cerasifera Ehrh. var. divaricata (Ledeb.) L. H. Bailey · Cherry plum
Babii Oleksandr Mykolaiovych, Vasiuta Svitlana Oleksandrivna, Kondratenko Petro Vasyl`ovych, Shevchuk Mykola Semenovych, Yer`omin Viktor Henadiiovych, Havrysh Volodymyr Fedorovych, Yer`omin Henadii Viktorovych,
Capsicum annuum L. · Bell pepper
CAPITAL GENETIC EBT, S.L.
Medicago L. · Medick
LANTMAeNNEN| Lantmaennen SW Seed AB
Solanum sisymbriifolium Lam. · Sticky nightshade
P.H. Petersen Saatzucht Lundsgaard GmbH Herrn Asmus Sören Petersen
Solanum tuberosum L. · Potato
Lietuvos agrarinių ir miškų mokslų centro Vokės filialas
Solanum lycopersicum L. · Tomato
Doug Heath
Capsicum annuum L. · Bell pepper
Enza Zaden Beheer B.V.
Vitis L. · Grapevine
INCONNU (FR)
Solanum lycopersicum L. · Tomato
Dr. Mario Martinelli
Brassica carinata A. Braun · Ethiopian mustard
Ing. Piet Lammers
Solanum tuberosum L. · Potato
UNIPLANTA
Solanum lycopersicum L. · Tomato
Dr. Mario Martinelli
Solanum lycopersicum L. · Tomato
Harmoniz
Solanum lycopersicum L. · Tomato
Dr. Mario Martinelli
Solanum lycopersicum L. · Tomato
Naomi Gavish
Solanum lycopersicum L. · Tomato
Harmoniz
Solanum lycopersicum L. · Tomato
HM Clause SAS (FR)/Abundant Seeds Pty Ltd (AU)
Solanum lycopersicum L. · Tomato
Sylvain Bontems
Solanum lycopersicum L. · Tomato
Dr. Mario Martinelli
Solanum tuberosum L. · Potato
Lietuvos agrarinių ir miškų mokslų centro Vokės filialas
Solanum tuberosum L. · Potato
Andriienko Ivan Ivanovych, Mel`nyk Pavlo Oleksiiovych, Pysarenko Nataliia Vasylivna, Honcharenko Ol`ha Petrivna, Sydorchuk Svitlana Volodymyrivna, Popereshniuk Valentyna Mykolaivna, Dems`ka Anastasiia Kyrylivna, Muzyka Lidiia Ivanivna, Sydorchuk Vasyl Iva