Rilana
ActiveSolanum tuberosum L. · Potato
Europlant Pflanzenzucht GmbH
DE
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.
Red Pearl
ActiveSolanum lycopersicum L. · Tomato
Johnny's Selected Seeds
NL
3 records
Red Knight
ActiveCapsicum annuum L. · Bell pepper
Seminis Vegetable Seeds
PL
4 records
Rambo
ActiveSolanum tuberosum L. · Potato
Stephan Berger
DE
4 records
Rainier
ActiveMedicago sativa L. · Alfalfa
NOVARTIS SEEDS
IT
4 records
Quadriga
ActiveSolanum tuberosum L. · Potato
SAKA PFLANZENZUCHT GMBH AND CO KG
DE
5 records
Purple Rain
ActiveSolanum tuberosum L. · Potato
Wageningen UR Plant Breeding
NL
6 records
Pr59n59
ActiveMedicago sativa L. · Alfalfa
PIONEER HI-BRED INTERNATIONAL
IT
5 records
Poranek
ActiveSolanum lycopersicum L. · Tomato
PLANTICO HODOWLA I NASIENNICTWO OGRODNICZE ZIELONKI SP. Z O.O.
PL
3 records
PR91B92
ActiveGlycine max (L.) Merr. · Soybean
PIONEER HI-BRED INT
IT
4 records
Protector
ActiveCapsicum annuum L. · Bell pepper
UNITED GENETICS SEEDS CO
PT
3 records
PR91M10
ActiveGlycine max (L.) Merr. · Soybean
PIONEER HI-BRED INTERNATIONAL
IT
6 records
Pomdor
ActiveSolanum tuberosum L. · Potato
Bretagne-Plants S.C.I.C.A.
FR
4 records
Playmaker
ActiveCapsicum annuum L. · Bell pepper
Seminis Vegetable Seeds
NL
5 records
Picobello
ActiveSolanum tuberosum L. · Potato
Thijs Jippes
NL
5 records
Pavana
ActiveFragaria x ananassa Duchesne ex Rozier · Garden strawberry
STICHTING DLO-CENTRUM VOOR PLANTENVEREDELINGS-EN
NL
5 records
Paradox
ActiveSolanum tuberosum L. · Potato
Teagasc Crops Research Department
IE
6 records
OAC Madoc
ActiveGlycine max (L.) Merr. · Soybean
Istvan Rajcan
UA
4 records
OAC Brooke
ActiveGlycine max (L.) Merr. · Soybean
Istvan Raikan
UA
4 records
Normandeline
ActiveSolanum tuberosum L. · Potato
Station de Recherche du Comite Nord (FR)
FR
4 records
Odett
ActiveSolanum tuberosum L. · Potato
Winfried Lange, Frank Lange
NL
6 records
Oclaire
ActiveSolanum tuberosum L. · Potato
Station de Recherche du Comité Nord G.I.E.
FR
5 records
OAC Strive
ActiveGlycine max (L.) Merr. · Soybean
UNIVERSITY OF GUELPH
UA
4 records
OAC Hastings
ActiveGlycine max (L.) Merr. · Soybean
UNIVERSITY OF GUELPH
UA
4 records