Sarvari Piroska
ActiveSolanum tuberosum L. · Potato
Sarvari Istvan
HU
5 records
Diseases
Rhizoctonia
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.
Breakdown by crop
Rhizoctonia Canker and Black Scurf of Potato
182
Rhizoctonia root rot — sugar beet
88
Rhizoctonia blight of tall fescue
26
Rhizoctonia root rot of table beet
16
Rice Sheath Blight
12
Rhizoctonia Root Rot — Fodder Beet
7
Rhizoctonia bottom rot of lettuce
7
Rhizoctonia blight — Perennial ryegrass
7
Rhizoctonia rot of radish
7
Rhizoctonia blight — Creeping bentgrass
6
Rhizoctonia root rot of beet
5
Rhizoctonia rot of carrot
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.
Sandrin
ActiveSolanum tuberosum L. · Potato
Winfried Lange, Frank Lange
DE
5 records
Rodman
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
5 records
Rhambler SRP
ActiveFestuca arundinacea Schreb. · Tall fescue
RUTGERS UNIVERSITY OF NEW JERSEY
IT
4 records
Robusta
Protection expiredSolanum tuberosum L. · Potato
UNIPLANTA| Uniplanta - Saatzucht KG
DE
5 records
Rhambler 2 SRP
ActiveFestuca arundinacea Schreb. · Tall fescue
RUTGERS UNIVERSITY OF NEW JERSEY
IT
4 records
Rambo
ActiveSolanum tuberosum L. · Potato
Stephan Berger
DE
4 records
Quadriga
ActiveSolanum tuberosum L. · Potato
SAKA PFLANZENZUCHT GMBH AND CO KG
DE
5 records
PR91B92
ActiveGlycine max (L.) Merr. · Soybean
PIONEER HI-BRED INT
IT
4 records
Pinia
ActiveLolium perenne L. · Perennial ryegrass
Malopolska Hodowla Roslin Spolka z o.o.
PL
4 records
Nordlicht
ActiveSolanum tuberosum L. · Potato
NORIKA Nordring-Kartoffelzucht-und Vermehrungs-GmbH Gross Luesewitz
DE
4 records
Moritz
ActiveSolanum tuberosum L. · Potato
Stephan Berger
DE
4 records
Milagro Filipino
ActiveOryza sativa L. · Rice
KOIPESOL SEMILLAS, S.A.
ES
3 records
Meireska
ActiveSolanum tuberosum L. · Potato
Niederösterreichische Saatbaugenossenschaft reg.Gen.m.b.H.
AT
4 records
Marizza
ActiveSolanum tuberosum L. · Potato
Niederösterreichische Saatbaugenossenschaft reg.Gen.m.b.H.
AT
5 records
Lunarossa
ActiveSolanum tuberosum L. · Potato
Piet H.Smeenge
NL
6 records
Mary Ann
ActiveSolanum tuberosum L. · Potato
NORIKA Nordring- Kartoffelzucht- und Ver
DE
5 records
Lukas
ActiveSolanum tuberosum L. · Potato
Saka Pflanzenzucht GmbH Co KG
DE
4 records
Luxion
Application submittedLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
FR
3 records
Lea
ActiveSolanum tuberosum L. · Potato
SOLANA SEEDS UNITED KINGDOM LTD. UNIT 4
DE
7 records
Lili
Application submittedSolanum tuberosum L. · Potato
SVALOF AB
BE
3 records
Lebrion
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
FR
4 records
Keona
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
6 records
Jonas
ActiveSolanum tuberosum L. · Potato
Saka Pflanzenzucht GmbH Co KG
DE
4 records