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.
Solanum tuberosum L. · Potato
Portiankin Dmytro IEvhenovych, Kozlova Liudmyla Mykolivna, Piskun Heorhii Ivanovych,
Solanum tuberosum L. · Potato
Koval` Nataliia Dem'ianivna, Sobran Vasyl Mykhailovych, Zholudenko Oksana Vladyslavivna, Pylypenko Liliia Aminivna, Myts`ko Volodymyr Mykolaiovych, Vermenko IUrii IAkovych, Razkevych Mykola Pylypovych, Osypchuk Alla Andriivna, Tarasenko Oleh Oleksandrovyc
x Raphanobrassica spp.
Dr. A.V. Stewart c/o PGG Wrightson Seeds Ltd. Kimihia Research Centre / Ing. Piet Lammers
Solanum lycopersicum L. · Tomato
Tovarystvo z obmezhenoiu vidpovidalnistiu "SPARK SIDZ"
Solanum lycopersicum L. · Tomato
Nunhems Netherlands B.V.
Solanum lycopersicum L. · Tomato
Axia NL B.V.
Solanum lycopersicum L. · Tomato
Axia NL B.V.
Solanum lycopersicum L. · Tomato
Hari Besels
Solanum lycopersicum L. · Tomato
Axia NL B.V.
Raphanus sativus L. var. oleiformis Pers. · Oil radish
VEREDELINGSSTATION AG
Solanum lycopersicum L. · Tomato
Axia NL B.V.
Solanum lycopersicum L. · Tomato
Axia NL B.V.
Solanum lycopersicum L. · Tomato
SEMINIS VEGETABLE SEED IB
Zea mays L. subsp. mays (Maize Group) · Maize
DEKALB PLANT GENETICS
Solanum lycopersicum L. · Tomato
Axia NL B.V.
x Raphanobrassica spp.
Ing. Piet Lammers
Hybrids between Prunus fruticosa Pall. and Prunus cerasus L.
Budzynskyi Oleksandr Serhiiovych,Yarmoliuk Ivan Savych,
Solanum tuberosum L. · Potato
Hunchak Volodymyr Mykhailovych, Chabanov Andrii Semenovych, Bondarchuk Anatolii Andriiovych, Tymko Liudmyla Volodymyrivna, Abdurahimova Tamara Volodymyrivna, Pysarenko Nataliia Vasylivna, Lysak Olena Andriivna, Tymko Mykola Hryhorovych, Sydorchuk Vasyl Iv
Solanum lycopersicum L. · Tomato
MERIDIEM SEEDS S.L.
Solanum tuberosum L. · Potato
Riznyk Viktor Semenovych, Razkevych Mykola Pylypovych, Svertoka Viktor IEvmenovych, Tarasenko Oleh Oleksandrovych, Taktaiev Borys Anatoliiovych, Mel`nyk Pavlo Oleksiiovych, Osypchuk Andrii Antonovych, Nazar Stefaniia Hryhorivna, Hrytsenko Kateryna Petrivn
Solanum tuberosum L. · Potato
Hodowla Ziemniaka Zamarte sp. z o.o. - Grupa IHAR
Solanum lycopersicum L. · Tomato
Axia NL B.V.
Solanum lycopersicum L. · Tomato
Axia NL B.V.
Solanum lycopersicum L. · Tomato
Axia NL B.V.