Pralyna
ActiveSolanum lycopersicum L. · Tomato
IT
1 record
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.
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
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.
Poran
Application submittedSolanum tuberosum L. · Potato
UA
1 record
Plaza
WithdrawnSolanum lycopersicum L. · Tomato
NL
1 record
Oltena
ActiveSolanum lycopersicum L. · Tomato
RO
1 record
PREDSLAVA
ActiveSolanum tuberosum L. · Potato
UA
2 records
Milbech
ActiveSolanum lycopersicum L. · Tomato
IT
1 record
Merlin
TerminatedBeta vulgaris L. · Beet
SK
1 record
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :Gaigne
FR
1 record
Mascalzone
ActiveSolanum lycopersicum L. · Tomato
IT
1 record
Pansta
TerminatedSolanum tuberosum L. · Potato
SE
1 record
Nemarex
TerminatedSolanum lycopersicum L. · Tomato
NL
1 record
MANI
TerminatedSolanum lycopersicum L. · Tomato
ES
1 record
Multic
Protection expiredRosa L. · Rose
NL
1 record
Ojakkyo
WithdrawnCitrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
NL
1 record
Minidor
ActiveSolanum lycopersicum L. · Tomato
IT
1 record
Molinella
ActiveOryza sativa L. · Rice
IT
2 records
Lillo
TerminatedSolanum lycopersicum L. · Tomato
IT
1 record
Leleka
Application submittedSolanum tuberosum L. · Potato
UA
1 record
Menco
Protection expiredSolanum tuberosum L. · Potato
NL
1 record
Melman
ActiveSolanum lycopersicum L. · Tomato
UA
2 records
Murietta
TerminatedSolanum lycopersicum L. · Tomato
NL
1 record
Kober 5BB M54
ActiveVitis L. · Grapevine
RO
1 record
Mogambo
TerminatedSolanum lycopersicum L. · Tomato
IT
1 record
Minizorro
Application submittedSolanum lycopersicum L. · Tomato
CZ
1 record