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.
Brassica napus var. napus · Rapeseed
DEUTSCHE SAAT| Deutsche Saatveredelung AG
Solanum lycopersicum L. var. lycopersicum · Tomato
ISI SEMENTI SPA
Solanum tuberosum L. · Potato
FIRLBECK KG| Saatzucht Firlbeck GmbH + Co. KG
Solanum tuberosum L. · Potato
Boreiko Oksana Olehivna, Sidakova Oksana Vladyslavivna, Kupriianova Tetiana Mykolaivna, Kyrylishyn Vasyl` Vasyl`ovych, Zakharchuk Nataliia Anatoliivna, Zelia Avreliia Heorhiivna, Furdyha Mykola Mykolaiovych, Bondarchuk Anatolii Andriiovych,
Avena strigosa Schreb. · Black oat
Jouffray-Drillaud SA (FR)
Glycine max (L.) Merr. · Soybean
Pat Grams
Beta vulgaris Sugar Beet Group · Sugar beet
Strube D&S GMBH
Solanum tuberosum L. · Potato
Mel`nyk Pavlo Oleksiiovych, Sihor`ova Dina Dmytrivna, Dihtiar`ov Viktor Mykolaiovych, Sumets` IUrii Ivanovych, Sakhoshko Mykola Mykolaiovych, Kozhushko Neli Semenivna,
Beta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE & CO.KGAA
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Solanum lycopersicum L. · Tomato
Kees Reinink
Solanum tuberosum L. · Potato
SAKA| SaKa Pflanzenzucht GmbH & Co. KG
Solanum lycopersicum L. · Tomato
Shevchenko Ihor Anlriiovych
Solanum tuberosum L. · Potato
Kravchenko Nataliia Volodymyrivna, Fedosii Ivan Oleksiiovych, Zakharchuk Nataliia Anatoliivna, Osypchuk Alla Andriivna, Tomash Anatolii Ivanovych, Cherednychenko Liubov Mykolaivna, Taktaiev Borys Anatoliiovych, Furdyha Mykola Mykolaiovych,
Gypsophila paniculata L. · Baby's-breath
Maria F.T. Zonderland
Solanum tuberosum L. · Potato
Borzykh Oleksandr Ivanovych, Sobran Vasyl` Mykhailovych, Oliinyk Tetiana Mykolaivna, Tomash Anatolii Ivanovych, Taktaiev Borys Anatoliiovych, Nazar Stefaniia Hryhorivna, Osypchuk Andrii Antonovych, Furdyha Mykola Mykolaiovych, Bondarchuk Anatolii Andriiov
Solanum lycopersicum L. · Tomato
Erik Bastet
Solanum lycopersicum L. · Tomato
HM Clause SAS (FR)
Solanum tuberosum L. · Potato
Kravchenko Oleksii Arsentiiovych, Podhaiets`kyi Anatolii Adamovych, Voitseshyna Nataliia Ivanivna, Bondarchuk Anatolii Andriiovych, Taktaiev Borys Anatoliiovych, Osypchuk Alla Andriivna, Nazar Stefaniia Hryhorivna, Osypchuk Andrii Antonovych,
Solanum lycopersicum L. · Tomato
Moshe Zalsman
Solanum lycopersicum L. · Tomato
Harmoniz
Solanum lycopersicum L. · Tomato
Manier Tohumculuk
Solanum tuberosum L. · Potato
KRAFFT (DE)
Solanum lycopersicum L. · Tomato
Francisco Avila