Diseases
Root rots are a complex of soil-borne fungal diseases affecting the underground part and the basal zone of plants. The infection manifests latently and leads to a 15–40% reduction in crop productivity.
Mentioned in descriptions 5 232 varieties reference book.
Root rots represent a group of pathologies affecting roots, tillering nodes, and underground internodes. The disease manifests as stand thinning, necrosis and browning of the root system, as well as the appearance of brown spots, streaks, and coatings on the basal part of the stem. External signs are often hidden and masked as nutrient deficiencies or winterkill, which is expressed in plant stunting, stem breakage, empty ears, and shriveled grain.
Disease development depends on a combination of abiotic factors and agronomic conditions. The infection actively progresses under excessive soil moisture, crop rotation violations, monoculture cropping, and the use of infected seed material. Mineral nutrient imbalance, especially potassium and phosphorus deficiency combined with nitrogen excess, reduces the natural immunity of plants, creating favorable conditions for pathogen activity across a wide temperature range.
In breeding practice, resistance to rots is often defined as tolerance—the ability of a plant to maintain productivity when infected. Variety evaluation is conducted on artificial and natural infection nurseries using quantitative disease scales from 1 to 9. Biophysical and conductometric methods are used for rapid analysis of the degree of tissue damage by pathogenic toxins.
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.
Nicotiana tabacum L. · Tobacco
Instytut Uprawy Nawożenia i Gleboznawstwa Państwowy Instytut Badawczy
Beta vulgaris Sugar Beet Group · Sugar beet
SESVanderhave NV
Solanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
Pisum sativum L. · Pea
Bortnovskyi Vitalii Mykolaiovych, Kondratenko Mykola Ivanovych, Buhaiov Vasyl Dmytrovych,
Allium cepa L. · Onion
Ger Bimsdeboer
Anethum graveolens L. · Dill
Tsyunel` Mykhailo Mechyslavovych, Havrysh Serhii Fedorovych,
Beta vulgaris Sugar Beet Group · Sugar beet
SAS Florimond Desprez Veuve & Fils
Solanum lycopersicum L. · Tomato
Kees Reinink
Solanum lycopersicum L. · Tomato
Kees Reinink
Beta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE & CO.KGAA
Solanum lycopersicum L. · Tomato
Anzhelika Rakov
Solanum lycopersicum L. · Tomato
Nunhems B.V.
Solanum lycopersicum L. · Tomato
RIJK ZWAAN Zaadteelt en Zaadhandel B.V.
hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
RIJK ZWAAN Zaadteelt en Zaadhandel B.V.
Clusia rosea Jacq.
Edplant B.V.
Eremurus M. B. · Desert Candle
Gebr. de Groot en Zn. V.O.F.
Solanum lycopersicum L. · Tomato
Kees Reinink
Salvia L. · Sage
Hans A. Hansen
Nepeta subsessilis Maxim.
A T Yates & Son
Kalanchoe blossfeldiana Poelln. · Flaming Katy
FGB B.V.
Hypericum androsaemum L. · Tutsan
Edwin Verheijen
Chamaerops
Leonardo Vigo
Penstemon Schmidel. · Beard Tongue
TERRA NOVA NURSERIES INC
Peperomia caperata Yunck. · Emerald ripple peperomia
Olga Lundager