Diseases
Rhizoctonia solani
Rhizoctonia is a polyphagous disease affecting underground and near-ground plant organs at all vegetation stages. The pathogen manifests as rots, stem and root ulcers, and sclerotia on tubers, which leads to sparse emergence and reduced commercial crop quality.
Mentioned in descriptions 1 239 varieties reference book.
Rhizoctonia manifests as sprout rotting, the formation of dark sunken ulcers on stems and roots, and the development of 'black scurf' or a mycelial mat in the near-ground area. During the vegetation period, leaf curling can be observed, and dense black formations known as sclerotia develop on the tuber surface.
Disease development depends on weather conditions, soil type, and agronomic practices, with a prolonged cold and wet spring being the most hazardous. The pathogen actively develops in heavy, acidic, and waterlogged soils, while its spread is facilitated by high plant density and the use of infected material.
In variety trials, resistance is evaluated by planting material in an artificial infection background with subsequent monitoring during the emergence, budding, and harvesting phases. The criteria include the degree of damage to sprouts, roots, and stolons, as well as the surface area of tubers covered by sclerotia compared to control samples.
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.
Solanum tuberosum L. · Potato
Niederösterreichische Saatbaugenossenschaft reg.Gen.m.b.H.
Solanum tuberosum L. · Potato
Dr. Sieber und Forster GbR (ForKa)
Solanum tuberosum L. · Potato
JOHANNA BERGER ^^^Stephan Berger
Solanum tuberosum L. · Potato
Aide Tsahkna 90%, Alice Anderfeld 5%, Mati Koppel 5%
Solanum tuberosum L. · Potato
HERMEZIU RADU
Solanum tuberosum L. · Potato
NIEDEROESTERREICHISCHE SAATBAUGENOSSENSCHAFT
Solanum tuberosum L. · Potato
Niederösterreichische Saatbaugenossenschaft reg.Gen.m.b.H.
Beta vulgaris Sugar Beet Group · Sugar beet
KWS| KWS SAAT AG
Brassica juncea (L.) Czern. · Brown mustard
UNIVERSITY OF IDAHO - JACK BROWN (US)
Beta vulgaris Sugar Beet Group · Sugar beet
SESVanderhave NV
Solanum tuberosum L. · Potato
HZPC Holland B.V.
Beta vulgaris Sugar Beet Group · Sugar beet
SESVanderhave NV
Beta vulgaris Sugar Beet Group · Sugar beet
Syngenta Seeds
Brassica juncea (L.) Czern. · Brown mustard
CREA- CENTRO DI RICERCA CEREALICOLTURA E COLTURE INDUSTRIALI (CREA-CI)
Beta vulgaris Sugar Beet Group · Sugar beet
GYLLENSPETZ| Ulf Gyllenspetz c/o Syngenta Seeds AB / JONSSON| Bengt-Olle Jonsson c/o Syngenta Seeds AB / JOHANSSON| Evert Johansson c/o Syngenta Seeds AB
Beta vulgaris Fodder Beet Group · Mangelwurzel
KWS SAAT SE & CO.KGAA
Solanum tuberosum L. · Potato
Europlant Innovation GmbH & Co. KG
Beta vulgaris Sugar Beet Group · Sugar beet
Florimond Desprez Veuve et Fils, FR
Beta vulgaris Sugar Beet Group · Sugar beet
Florimond Desprez Veuve et Fils, FR
Beta vulgaris Sugar Beet Group · Sugar beet
Florimond Desprez Veuve et Fils, FR
Beta vulgaris Sugar Beet Group · Sugar beet
Florimond Desprez Veuve et Fils, FR
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
UNGER| Heidi Unger
Daucus carota L. · Carrot
Vilmorin SA (FR)
Solanum tuberosum L. · Potato
Saka Pflanzenzucht GmbH Co KG