Pests

Nematodes

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.

Sources10

Breakdown by crop

Root-knot nematodes of tomato 1 711 Potato nematodes 1 231 Nematodes of sugar beet 287 Pepper Nematodes 154 Nematodes — Oilseed radish 143 Nematodes in white mustard 105 Nematodes — Tomato (Interspecific Hybrids) 79 Alfalfa nematodes 62 Barley nematodes 55 Root-knot nematodes of tomato 49 Soybean cyst nematode 35 Grapevine Nematodes 32 Plum nematodes 24 Peach nematodes 22 Rice nematodes 22 Nematodes in black oat 21 Nematodes of oats 20 Citrus Nematode 19 Nematodes — Prunus amygdalus x Prunus persica 16 Nematodes of White Clover 15 Nematodes in Prunus davidiana × Prunus persica hybrids 14 Nematodes — Solanum torvum Sw. 14 Nematodes — common wheat 14 Nematodes — hybrids between Citrus x aurantium L. x Citrus trifoliata L. 13

Found in these crops

Tomato 1 709 Potato 1 216 Sugar beet 288 Bell pepper 152 Oil radish 143 White mustard 105 hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner 79 Alfalfa 62 Barley 53 Tomato 48 Soybean 33 Grapevine 32

Varieties that feature this in their description

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.

SE 16/2

Terminated

Triticum aestivum L. · Bread wheat

Seres Emese / Zsombik Laszlo / Sipos Tamas

1 record

Shafer F1

Terminated

Solanum lycopersicum L. · Tomato

Kostenko Inna Mykolaivna, Yanchuk Nina Ivanivna, Prylipka Oleksii Vasyl`ovych, Kravchenko Vladyslav Andriiovych,

2 records

Santarka

Terminated

Solanum tuberosum L. · Potato

Kozun` Ihor Ivanovych, Mel`nyk Pavlo Oleksiiovych, Tymko Liudmyla Volodymyrivna, Pysarenko Nataliia Vasylivna, Lysak Olena Andriivna, Antriienko Tetiana Mykhailivna, Tymko Mykola Hryhorovych, Sydorchuk Vasyl Ivanovych,

2 records

Safia

Active

Solanum tuberosum L. · Potato

Germicopa SA (FR)

2 records

SALSA F1

Active

Solanum lycopersicum L. · Tomato

BHN SEED RESEARCH

1 record

Safaix F1

Terminated

Solanum lycopersicum L. · Tomato

Sil`vei Bontems

1 record

SD102

Terminated

Zea mays L. subsp. mays (Maize Group) · Maize

Saatzucht Hadmersleben Gmbh (DE)

1 record

Salsa

Terminated

Lolium perenne L. · Perennial ryegrass

Carneau Freres SA (FR)

1 record

SC-21050

Application submitted

Solanum lycopersicum L. · Tomato

Harmoniz

1 record

rosica

Terminated

Solanum tuberosum L. · Potato

SAKA PFLANZENZUCHT GBR

1 record

Romanto

Application submitted

Solanum lycopersicum L. · Tomato

Syngenta Crop Protection AG

2 records

Roxlana

Terminated

Solanum lycopersicum L. · Tomato

May Agro Seed Corp.(TR)

1 record

Rostavytsia

Active

Solanum tuberosum L. · Potato

Starovoit Vitalii Borysovych, Siharova Dina Dmytrivna, Hunchak Volodymyr Mykhailovych, Oliinyk Tetiana Mykolaivna, Tymko Liudmyla Volodymyrivna, Furdyha Mykola Mykolaiovych, Bondarchuk Anatolii Andriiovych, Tymko Mykola Hryhorovych, Sydorchuk Vasyl Ivanov

2 records

RUBIVELLA

Application submitted

Solanum lycopersicum L. · Tomato

Harmoniz

1 record

ROSASTELLA

Application submitted

Solanum lycopersicum L. · Tomato

HAZERA SEEDS BV

1 record

Rosalisa F1

Active

Solanum lycopersicum L. · Tomato

J. Hoogstarten

2 records

Rosava

Terminated

Solanum tuberosum L. · Potato

Sihar`ova Dina Dmytrivna, Furdiha Mykola Mykolaiovych, Voitseshyna Nataliia Ivanivna, Cherednichenko Liubov Mykolaiovych, Tomash Anatolii Ivanovych, Taktaiev Borys Anatoliiovych, Osypchuk Alla Andriivna, Kravchenko Oleksii Arsentiiovych, Nazar Stefaniia

2 records

Rosalia

Terminated

Solanum tuberosum L. · Potato

SAKA PFLANZENZUCHT GBR

1 record

ROYAL CHICO

Terminated

Solanum lycopersicum L. · Tomato

PETOSEED CO

1 record

Robin

Withdrawn

Trifolium incarnatum L. · Crimson clover

AUBURN UNIVERSITY

1 record

Romy

Active

Solanum tuberosum L. · Potato

Kweek- en Researchbedrijf Agrico B.V.

2 records

Rescler

Terminated

Triticum aestivum L. · Bread wheat

INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR

2 records

Roksolana F1

Terminated

Solanum lycopersicum L. · Tomato

Aikhan Enhin

1 record

Rebellion

Withdrawn

Raphanus sativus L. var. oleiformis Pers. · Oil radish

KWS SAAT SE & CO.KGAA

2 records

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Pests

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Text source

This summary is compiled from the publications listed in the sources and verified by an editor. It contains no legally significant information; it provides agronomic context for registry data rather than the registry data itself.