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
SYNGENTA SEEDS B.V.
Raphanus sativus L. var. oleiformis Pers. · Oil radish
ILVO Plant
Sinapis alba L. · White mustard
VEREDELINGSSTATION AG
Capsicum annuum L. · Bell pepper
Enza Zaden Beheer B.V.
Hordeum vulgare L. · Barley
SEJET PLANTEFORÆDLING
Solanum lycopersicum L. · Tomato
Paul Degreef
Solanum lycopersicum L. · Tomato
Monsanto Vegetable IP Management B.V.
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Solanum tuberosum L. · Potato
STET HOLLAND
Solanum lycopersicum L. · Tomato
Nunhems B.V.
Solanum lycopersicum L. · Tomato
Syngenta Crop Protection AG
Capsicum annuum L. · Bell pepper
Nunhems B.V.
Lavatera L. · Tree mallow
Lommerse, Jan
Raphanus sativus L. var. oleiformis Pers. · Oil radish
Euro Grass Breeding GmbH Co. KG
Sinapis alba L. · White mustard
PHP PETERSEN
Solanum tuberosum L. · Potato
Justus Bohm
Solanum tuberosum L. · Potato
SCOTTISH CROP RESEARCH INSTITUTE
Solanum tuberosum L. · Potato
VERShININ BORIS MIHAJLOVICh
Medicago sativa L. · Alfalfa
Tombolan, I
Solanum lycopersicum L. · Tomato
Nunhems B.V., Nunhems B.V.
Glycine max (L.) Merr. · Soybean
RAC Station federale de recherches agronomiques de Changins (CH)
Solanum lycopersicum L. · Tomato
Bejo Zaden BV, NL
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Sinapis alba L. · White mustard
P.H PETERSEN