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 lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Solanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
Solanum lycopersicum L. · Tomato
INTERSEMILLAS SAU
Solanum lycopersicum L. · Tomato
HAZERA SEEDS BV
Solanum lycopersicum L. · Tomato
ReinSaat KG
Solanum lycopersicum L. · Tomato
Gautier Semences SAS (FR)
Solanum lycopersicum L. · Tomato
Gautier Semences SAS (FR)
Solanum tuberosum L. · Potato
Maatschap W. Koeman J.R.C. Koeman B.V. en J.R.C. Koeman
Solanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
Solanum lycopersicum L. · Tomato
Syngenta Seeds B.V.
Solanum lycopersicum L. · Tomato
Gautier Semences SAS (FR)
Solanum lycopersicum L. · Tomato
Syngenta Seeds B.V.
Solanum tuberosum L. · Potato
Kuipers Potato V.O.F.
Solanum lycopersicum L. · Tomato
HM.Clause S.A.S.
Glycine max (L.) Merr. · Soybean
Milad Eskandari
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Solanum lycopersicum L. · Tomato
HAZERA SEEDS BV
Solanum lycopersicum L. · Tomato
Tezier SA (FR)
Solanum tuberosum L. · Potato
Pomorsko Mazurska Hodowla Ziemniaka Sp.z o.o. z siedziba w Strzekecinie
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Solanum tuberosum L. · Potato
Hodowla Ziemniaka Zamarte sp. z o.o. - Grupa IHAR
Solanum tuberosum L. · Potato
Interseed Potatoes GmbH
Sinapis alba L. · White mustard
PRZEDSIęBIORSTWO NASIENNE "ROLNAS" SP. Z O.O.
Solanum lycopersicum L. · Tomato
Institute of Vegetable Crops Maritsa - Plovdiv (BG) and Center of Plant Systems Biology and Biotechnology - Plovdiv (BG)