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.

Sources10

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

Potato 162 Sugar beet 119 Tall fescue 40 Garden beet 19 Lettuce 10 Perennial ryegrass 9 Mangelwurzel 9 Radish 8 Brown mustard 7 Beet 6 Creeping bentgrass 6 Triticale 5

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.

WL 311

Terminated

Medicago sativa L. · Alfalfa

WATERMAN LOOMIS

1 record

TERTUS

Protection expired

Solanum tuberosum L. · Potato

VANDEL POTATOES I/S

2 records

SW Stratos

Terminated

Brassica napus L. · Rapeseed

Bengtsson Lena

1 record

Stetson

Withdrawn

Festuca arundinacea Schreb. · Tall fescue

BRENTANO| Thomas E. Brentano c/o Lesco Inc.

2 records

SAPHIR

Terminated

Solanum tuberosum L. · Potato

KRAFFT (DE)

1 record

RumianaSavanna

Terminated

Solanum tuberosum L. · Potato

Kupreichuk Viktor Petrovych, Dan`ko Heorhii Vasyl`ovych, Kolontai Hryhorii Mykolaiovych, Khomenko Larysa Dmytrivna, Petrenko Kateryna Oleksandrivna, Onyshcenko Oleh Fedorovych,

2 records

RODYNA

Active

Beta vulgaris Garden Beet Group · Garden beet

Sakata Vegetabels Europe, F

1 record

QUEENA

Withdrawn

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE & CO.KGAA

1 record

Okolytsia

Active

Solanum tuberosum L. · Potato

Voitseshyna Nataliia Ivanivna, Mel`nyk Pavlo Oleksiiovych, Taktaiev Borys Anatoliiovych, Osypchuk Alla Andriivna, Nazar Stefaniia Hryhorivna, Bondarchuk Anatolii Andriiovych, Osypchuk Andrii Antonovych,

2 records

MVS-AP-101

Active

Agrostis stolonifera L. · Creeping bentgrass

Mountain View Seeds

1 record

NETTED GEM

Terminated

Solanum tuberosum L. · Potato

L.BAARBAK

1 record

Liubava

Active

Solanum tuberosum L. · Potato

Instytut kartopliarstva Natsionalnoi akademii ahrarnykh nauk Ukrainy

2 records

JAVALAMBRE

Active

Lactuca sativa L. · Lettuce

RAMIRO ARNEDO, S.A.

1 record

Khortytsia

Active

Solanum tuberosum L. · Potato

Oliinyk Tetiana Mykolaivna, Zelia Heorhii Viorelovych, Roik Mykola Volodymyrovych, Rozhniatovskyi Andrii Olehovych, Podhaiets`kyi Anatolii Adamovych, Taktaiev Borys Anatoliiovych, Kupriianova Tetiana Mykolaivna, Zakharchuk Nataliia Anatoliivna, Furdyha My

2 records

Harris

Active

Lolium perenne L. · Perennial ryegrass

Deutsche Saatveredelung AG - DSV (DE)

1 record

Denali

Application submitted

Beta vulgaris Garden Beet Group · Garden beet

SAKATA SEED AMERICA INC US

1 record

Cassius

Application submitted

Beta vulgaris Garden Beet Group · Garden beet

SAKATA SEED AMERICA INC US

1 record

CA1421

Active

x Triticosecale Wittm. ex A. Camus · Triticale

AGRI OBTENTIONS / INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE (I.N.R.A.)

1 record

BTS Smart 3905 RHC

Active

Beta vulgaris Sugar Beet Group · Sugar beet

Betaseed

1 record

Arteon

Active

Beta vulgaris Sugar Beet Group · Sugar beet

SESVanderhave NV

4 records

3K389

Withdrawn

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE & CO.KGAA

1 record

DANYEL10

Terminated

Bidens ferulifolia (Jacq.) DC. · Apache beggartick

Gavriel Danziger

1 record

Valdivia

Withdrawn

Hordeum vulgare L. · Barley

W. von Borries-Eckendorf GmbH & Co.KG

1 record

Smart Uriella KWS

Active

Beta vulgaris Sugar Beet Group · Sugar beet

1 record

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Text source

This summary is compiled from the publications listed in the sources and verified by an editor. It contains no legally significant information; it provides agronomic context for registry data rather than the registry data itself.