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.
Medicago sativa L. · Alfalfa
Plant Breeding International Cambridge Ltd (GB)
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Solanum lycopersicum L. · Tomato
Syngenta Seeds B.V.
x Triticosecale Wittm. ex A. Camus · Triticale
Danko Hodowla Roslin Sp.z.o.o.
Solanum lycopersicum L. · Tomato
Bayer Holland B.V.
Solanum lycopersicum L. · Tomato
Syngenta Seeds B.V.
hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Trifolium pratense L. · Red clover
Hagberg, Arne
Beta vulgaris Sugar Beet Group · Sugar beet
Strube D&S GMBH
Beta vulgaris Sugar Beet Group · Sugar beet
Ditrikh Khauer, Andrez Look,
Rubus idaeus L. · Red raspberry
The James Hutton Institute, Dundee, DD2 5DA
Solanum lycopersicum L. · Tomato
Hazera Seeds, NL
Triticum aestivum L. · Bread wheat
SECOBRA RECHERCHES S.A.S
Beta vulgaris Sugar Beet Group · Sugar beet
SYNGENTA WINTER OILSEED AB
Allium cepa L. · Onion
Enza Zaden, NL
Solanum lycopersicum L. · Tomato
Enza Zaden Bikhir B.V.
Triticum aestivum L. · Bread wheat
Institut national de recherche pour l'agriculture, l'aliment (FR)/Agri Obtentions SA (FR)
Lolium perenne L. · Perennial ryegrass
PICKSEED WEST INC
Asparagus officinalis L. · Asparagus
Ger Beemsterboer
Solanum lycopersicum L. · Tomato
Paul Degreef
Solanum lycopersicum L. · Tomato
Bayer Holland B.V.
Solanum lycopersicum L. · Tomato
Syngenta Crop Protection AG
hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Rijk Zwaan Zaadteelt en Zaadhandel B.V. (NL)
Allium cepa L. · Onion
SUNSEEDS