Nemo
ActiveSolanum tuberosum L. · Potato
Fobek B.V., Tuberosum Technologies Inc.
NL
6 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.
Nordlicht
ActiveSolanum tuberosum L. · Potato
NORIKA Nordring-Kartoffelzucht-und Vermehrungs-GmbH Gross Luesewitz
DE
4 records
Nevadina
ActiveSolanum tuberosum L. · Potato
Europlant Pflanzenzucht GmbH
DE
5 records
Mountain Magic
ActiveSolanum lycopersicum L. · Tomato
Bejo Zaden B.V.
NL
6 records
Myrobalan 29C
ActivePrunus cerasifera Ehrh. · Cherry plum
Marion E. Gregory
UA
4 records
Moritz
ActiveSolanum tuberosum L. · Potato
Stephan Berger
DE
4 records
Melrose
ActiveSolanum tuberosum L. · Potato
Romagnoli FLLI SpA
IT
5 records
Meireska
ActiveSolanum tuberosum L. · Potato
Niederösterreichische Saatbaugenossenschaft reg.Gen.m.b.H.
AT
4 records
MI 793
ActiveMalus Mill. · Apple
ES
3 records
Mayan Twilight
ActiveSolanum tuberosum L. · Potato
SCOTTISH CROP RESEARCH INSTITUTE
IE
5 records
Maya
ActiveSolanum tuberosum L. · Potato
Danespo A/S
DK
5 records
Meera
ActiveSolanum tuberosum L. · Potato
PLANTERA SEED BV
NL
6 records
Megusta
ActiveSolanum tuberosum L. · Potato
Bavaria Saat GbR
DE
4 records
Maverick
ActiveSolanum tuberosum L. · Potato
Station de Recherche du Comité Nord G.I.E.
FR
5 records
Mariana GF 8-1
ActivePrunus L. · Plum
HU
4 records
Marizza
ActiveSolanum tuberosum L. · Potato
Niederösterreichische Saatbaugenossenschaft reg.Gen.m.b.H.
AT
5 records
Marlie
ActiveSolanum tuberosum L. · Potato
Europlant Pflanzenzucht GmbH
DE
6 records
Malwina
ActiveFragaria L. · Strawberry
Peter Stoppel
UA
4 records
Mercurian
ActiveAllium porrum L. · Leek
Syngenta Seeds B.V.
NL
7 records
Mayan Rose
ActiveSolanum tuberosum L. · Potato
JAMES HUTTON LTD
IE
5 records
M 106
ActiveMalus domestica (Suckow) Borkh. · Apple
RO
3 records
MagnaGraze
ActiveMedicago sativa L. · Alfalfa
Dairyland Seed Company
CZ
3 records
Megan
ActiveSolanum tuberosum L. · Potato
VŠÚZ - Výskumný a šlachtitelský ústav zemiakársky a.s.
SK
5 records
Mc Call
ActiveGlycine max (L.) Merr. · Soybean
HU
3 records