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.

Rapido

Active

Solanum lycopersicum L. var. lycopersicum · Tomato

LAMBOSEEDS S.R.L.

1 record

Rapit F1

Terminated

Solanum lycopersicum L. · Tomato

J. Hoogstarten

2 records

Ramiro

Withdrawn

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

VANDIJKE| VANDIJKE RESEARCH B.V.

2 records

Radomysl`

Active

Solanum tuberosum L. · Potato

Balashova Halyna Stanislavivna, Sobran Vasyl Mykhailovych, Bondarchuk Anatolii Andriiovych, Tymko Liudmyla Volodymyrivna, Abdurahimova Tamara Volodymyrivna, Pysarenko Nataliia Vasylivna, Lysak Olena Andriivna, Tymko Mykola Hryhorovych, Sydorchuk Vasyl Iva

2 records

Remembe

Active

Solanum lycopersicum L. · Tomato

Tovarystvo z obmezhenoiu vidpovidalnistiu "SPARK SIDZ"

2 records

RA 1502

Withdrawn

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

RING AROUND

1 record

QUEENA

Withdrawn

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE & CO.KGAA

1 record

Psel`s`ka

Terminated

Solanum tuberosum L. · Potato

Mel`nyk Pavlo Oleksiiovych, Siharova Dina Dmytrivna, Kryshtal` Valentyna Ivanivna, Torchyts`ka Liudmyla Serhiivna, Voitenko Oleksandr Hryhorovych, Sakhoshko Mykola Mykolaiovych, Kozhushko Neli Semenivna,

2 records

Rafynda

Active

Solanum lycopersicum L. · Tomato

Gautier Semences SAS (FR)

1 record

Przybrodzka

Active

Camelina sativa (L.) Crantz · Camelina

Uniwersytet Przyrodniczy w Poznaniu

1 record

PRUMEX

Terminated

Solanum tuberosum L. · Potato

PRUMMEL (NL)

1 record

Proud Mary

Active

Tagetes L. · Marigold

Ing. Piet Lammers

1 record

Progress F1

Terminated

Solanum lycopersicum L. · Tomato

Hari Besels

1 record

Princess of Orange

Active

Tagetes L. · Marigold

Ing. Piet Lammers

1 record

Prego

Terminated

Fagopyrum esculentum Moench · Buckwheat

PETERSEN| Asmus Soeren Petersen in Fa. P.H. Petersen Saatzucht Lundsgaard GmbH & Co KG / BAECKER| Paul Baecker

1 record

Quattro

Active

Solanum sisymbriifolium Lam. · Sticky nightshade

VANDINTER RESEARCH B.V.

1 record

Polis`ka iuvileina

Active

Solanum tuberosum L. · Potato

Zelia Aurika Hryhorivna, Plotnyts`ka Ol`ha Volodymyrivna, Honcharenko Ol`ha Petrivna, Pysarenko Nataliia Vasylivna, Tymko Mykola Hryhorovych, Lysak Olena Andriivna, Andrienko Tetiana Mykhailivna, Sydorchuk Svitlana Volodymyrivna, Popereshniuk Valentyna My

2 records

PORTOS

Terminated

Solanum lycopersicum L. · Tomato

Seminis Vegetable Seeds

1 record

POLDJE RS

Terminated

Solanum lycopersicum L. · Tomato

Seminis Vegetable Seeds

1 record

Podoliia

Terminated

Solanum tuberosum L. · Potato

Zelia Aureliia Heorhiivna, Bondarchuk Anatolii Andriiovych, Kozun` Ihor Ivanovych, Tymko Liudmyla Volodymyrivna, Pysarenko Nataliia Vasylivna, Lysak Olena Andriivna, Andriienko Tetiana Mykhailivna, Tymko Mykola Hryhorovych, Sydorchuk Vasyl Ivanovych,

4 records

Pink Nice

Active

Solanum lycopersicum L. · Tomato

HAZERA SEEDS BV

1 record

PINKEZ

Application submitted

Solanum lycopersicum L. · Tomato

NEZZALEZ, S.L.

1 record

Ponto

Terminated

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

KERCHER| Dr. Adolf Kercher / REIMER| Annegret Reimer in Fa. SW Seed GmbH - Zuchtstation Natendorf -

1 record

Pink Unicum F1

Terminated

Solanum lycopersicum L. · Tomato

J. Hoogstarten

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.