Tokai
ActiveSolanum tuberosum L. · Potato
Danespo A/S
DK
4 records
Diseases
Late blight
Phytophthora infestans
Late blight is a dangerous disease of solanaceous crops caused by an oomycete, which manifests as the appearance of spots on leaves, stems, and tubers. The development of the disease is triggered by high humidity and moderate temperatures, which can lead to significant crop losses.
Mentioned in descriptions 6 798 varieties reference book.
Affected plants develop dirty-brown spots, often accompanied by a whitish mold on the underside of the leaf, while elongated dark-brown spots appear on the stems. Tubers show hard, sunken brown spots, and the internal tissue exhibits a characteristic rust-brown discoloration upon cutting.
Epiphytotics develop under conditions of high air humidity around 90% and alternating warm days with cool nights. The presence of free moisture, such as dew or fog, is a critical factor for rapid spore germination, which allows the infection to spread across the field in 10–15 days.
In breeding, a distinction is made between specific vertical resistance, controlled by R-genes, and field horizontal resistance, which is considered more reliable due to its polygenic nature and ability to slow down pathogen development. Varieties are evaluated using a 9-point scale; however, the resistance level of the foliage does not always coincide with that of the tubers, requiring comprehensive analysis during variety testing.
Breakdown by crop
Potato late blight
1 396
Tomato Late Blight
273
Phytophthora root rot of strawberry
99
Phytophthora Root and Stem Rot of Soybean
61
Phytophthora Root Rot of Alfalfa
41
Phytophthora blight of pepper
41
Apple Phytophthora Rot
24
Phytophthora Root Rot of Raspberry
21
Apple Phytophthora Rot
20
Tomato Late Blight
17
Citrus Phytophthora
17
Plum Phytophthora root rot
15
Phytophthora blight — hybrids between Citrus x aurantium L. x Citrus trifoliata L.
13
Strawberry Phytophthora root rot
13
Phytophthora Root Rot of Blueberry
11
Phytophthora root rot of sweet chestnut
9
Phytophthora blight — Leek
7
Phytophthora root rot of sour cherry
6
Phytophthora root rot of paradise apple
6
Avocado Phytophthora Root Rot
6
Peach Phytophthora Root Rot
5
Phytophthora root rot of Vaccinium
5
Late Blight of Eggplant
4
Phytophthora root rot of Prunus amygdalus x Prunus persica
4
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.
Tacja
ActiveSolanum tuberosum L. · Potato
Hodowla Ziemniaka Zamarte sp. z o.o. - Grupa IHAR
PL
4 records
TEENA
TerminatedSolanum tuberosum L. · Potato
SCOTTISH RESEARCH INSTITUTE
IE
3 records
Tiina
ActiveSolanum tuberosum L. · Potato
Aide Tsahkna 50%, Terje Tähtjärv 50%, Centre of Estonian Rural Research and Knowledge
EE
3 records
Syriusz
ActiveSolanum lycopersicum L. · Tomato
PLANTICO HODOWLA I NASIENNICTWO OGRODNICZE ZIELONKI SP. Z O.O.
PL
4 records
Teele
ActiveSolanum tuberosum L. · Potato
Aide Tsahkna (85%), Terje Tähtjärv (10%), Mati Koppel (5%), Centre of Estonian Rural Research and Knowledge
EE
3 records
Summit
TerminatedSolanum tuberosum L. · Potato
New Zealand Institute for Crop and Food Research Ltd
SK
3 records
Sunrae
Protection expiredPhaseolus vulgaris L. · Common bean
Syngenta Seeds
NL
2 records
Suleika
TerminatedSolanum tuberosum L. · Potato
Niederösterreichische Saatbaugenossenschaft reg.Gen.m.b.H.
AT
3 records
Syrena
TerminatedSolanum tuberosum L. · Potato
Pomorsko Mazurska Hodowla Ziemniaka Sp.z o.o. z siedziba w Strzekecinie
PL
3 records
Surecrop
ActiveFragaria x ananassa Duchesne ex Rozier · Garden strawberry
Scott & Sons Co (US)
FR
3 records
Super Mama
ActiveSolanum lycopersicum L. · Tomato
BURPEE NL B.V.
NL
2 records
SW Superb
TerminatedSolanum tuberosum L. · Potato
Böös Ulla
SE
3 records
STOCKTON MORELLO
Activehybrids between Prunus davidiana and Prunus persica
ES
2 records
Struma 75
TerminatedNicotiana tabacum L. · Tobacco
Dimitar S. Shabanov, Nikola G. Tomov, Vasil D. Pophristov, Iliya K. Popivanov
BG
2 records
Surmia
ActiveSolanum tuberosum L. · Potato
Hodowla Ziemniaka Zamarte sp. z o.o. - Grupa IHAR
PL
4 records
Stärkeprofi
ActiveSolanum tuberosum L. · Potato
JOHANNA BERGER ^^^Stephan Berger
DE
3 records
Spartaan
Protection expiredSolanum tuberosum L. · Potato
Zelder BV (NL)
FR
3 records
SOLHY022
Application submittedSolanum tuberosum L. · Potato
Agventure BV
NL
3 records
Stokrotka
ActiveSolanum tuberosum L. · Potato
Pomorsko Mazurska Hodowla Ziemniaka Sp.z o.o. z siedziba w Strzekecinie
PL
4 records
Solito
ActiveSolanum lycopersicum L. · Tomato
Pro-Veg Seeds Ltd. Unit N Peek House, Dales Manor Business Park
NL
2 records
Sloan
Protection expiredGlycine max (L.) Merr. · Soybean
Iowa Agriculture and Home Economics Experiment Station
FR
2 records
Sissy
ActivePyrus communis L. · European pear
Vasilios Kempapidis
GR
4 records
Skerry Champion
ActiveSolanum tuberosum L. · Potato
004. Dept. of Agriculture, Ireland
IE
2 records