Saphia
ActiveSolanum tuberosum L. · Potato
Winfried Lange, Frank Lange
DE
8 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.
Safari
ActiveSolanum tuberosum L. · Potato
STET HOLLAND RESEARCH B.V.
NL
8 records
Sally
ActiveSolanum tuberosum L. · Potato
IRISH SEED POTATOES LTD
NL
6 records
Rainbow
ActiveSolanum tuberosum L. · Potato
Station de Recherche du Comité Nord G.I.E.
FR
9 records
Red Emmalie
ActiveSolanum tuberosum L. · Potato
Karsten Ellenberg
DE
7 records
Prize
ActiveFragaria x ananassa Duchesne ex Rozier · Garden strawberry
Steven D. Nelson^^^Michael D. Nelson^^^Stephen M. Ackerman
NL
7 records
p061103
ActiveFragaria x ananassa Duchesne ex Rozier · Garden strawberry
Vissers America B.V., NL
NL
7 records
Obama
ActiveSolanum tuberosum L. · Potato
SELECTIEBEDRIJF KOOI
NL
8 records
Nitro Plus
ActiveTrifolium resupinatum L. · Persian clover
SEEDCO
IT
7 records
Meister
ActiveSolanum tuberosum L. · Potato
Stephan Berger
DE
7 records
M 7
ActiveMalus domestica (Suckow) Borkh. · Apple
NL
8 records
Marvel
ActiveSolanum tuberosum L. · Potato
Smeenge, P.H.
NL
7 records
Lake Powell
ActiveTrachelium caeruleum L. · Blue throatwort
PanAmerican Seed Company
NL
5 records
Lady Balfour
ActiveSolanum tuberosum L. · Potato
SCOTTISH CROP RESEARCH INSTITUTE
NL
7 records
KB1
ActivePersea americana Mill. · Avocado
Lehmann Klaus Bederski
ES
7 records
Jule
ActiveSolanum tuberosum L. · Potato
SOLANA SEEDS UNITED KINGDOM LTD. UNIT 4
DE
8 records
Isabelia
ActiveSolanum tuberosum L. · Potato
Heinrich Böhm
NL
8 records
Invictus
ActiveSolanum tuberosum L. · Potato
ROCUS PIETER GRAVELAND
NL
8 records
Huckleberry Gold
ActiveSolanum tuberosum L. · Potato
University of Idaho
DE
7 records
Harry
ActiveSolanum tuberosum L. · Potato
IRISH SEED POTATOES LTD
IE
8 records
Gerona
ActiveSolanum tuberosum L. · Potato
Wilhelm Weuthen GmbH & Co. KG^^^Schaap Holland B.V.
NL
6 records
Genesis
ActiveMedicago sativa L. · Alfalfa
NSW DEPARTMENT OF AGRICULTURE
IT
8 records
Fenway Red
ActiveSolanum tuberosum L. · Potato
IPR B.V.
NL
7 records
Delila
ActiveSolanum tuberosum L. · Potato
Lairy - Joly Gise'le
FR
6 records