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.
Triticum aestivum L. · Bread wheat
KWS MOMONT RECHERCHE SARL, FR
Medicago sativa L. · Alfalfa
SECURITY SEEDS
Allium cepa L. · Onion
MAURIZIO BACCHI
Fragaria L. · Strawberry
Sort ie suspil`nym nadbanniam
Allium cepa L. · Onion
Nunhems, NL
Allium cepa L. var. cepa · Onion
Hazera Seeds B.V.
Allium cepa L. · Onion
MARALDI DANIELE
Zea mays L. subsp. mays (Maize Group) · Maize
MONSANTO TECHNOLOGY
Allium cepa L. · Onion
Sheila Adimargono
Beta vulgaris Sugar Beet Group · Sugar beet
Societe Europeenne de Semences NV/SA (BE)
Allium cepa L. · Onion
Ger Beemsterboer
Beta vulgaris Sugar Beet Group · Sugar beet
Margaret Rekoske
Allium cepa L. · Onion
Martin Slot, John Pieter Schipper,
Beta vulgaris Sugar Beet Group · Sugar beet
Henning Friehe
Allium cepa L. · Onion
Martin Slot, John Pieter Schipper,
Allium cepa L. var. cepa · Onion
Bejo Zaden B.V., De Groot en Slot B.V.
Rhododendron L. · Azalea
KARL GLASER
Beta vulgaris Sugar Beet Group · Sugar beet
Strube Saat GmbH&Co KG
Beta vulgaris Sugar Beet Group · Sugar beet
KWS Saat SE, Einbeck DE
Solanum lycopersicum L. · Tomato
Takii and Co Ltd (JP)
Beta vulgaris Sugar Beet Group · Sugar beet
SESVANDERHAVE, N.V./S.A.
hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
CORA SEEDS S.R.L
Solanum lycopersicum L. · Tomato
De Ruiter Seeds NL B.V.
Solanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.