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.
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
Glycine max (L.) Merr. · Soybean
THE MINNESOTA AGRICULTURAL EXPERIMENT STATION
Solanum lycopersicum L. · Tomato
Syngenta Seeds, NL
hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Nunhems B.V.
Festuca arundinacea Schreb. · Tall fescue
Rutgers, The State University of New Jersey
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
UNIVERS. OF FLORIDA
hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
MARTIJN VAN STEE
hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Seminis Vegetable Seeds
Triticum aestivum L. · Bread wheat
SECOBRA RECHERCHES S.A.S
Lolium perenne L. · Perennial ryegrass
PICKSEED
Triticum aestivum L. · Bread wheat
Florimond Desprez Veuve et Fils, FR
Solanum lycopersicum L. · Tomato
Nunhems B.V., 6083 AB Nunhem
Medicago sativa L. · Alfalfa
GOLDEN WEST SEED RESEARCH Co.
Trifolium subterraneum L. · Subterranean clover
NEW SOUTH WALES, DEP.AGR.
Lactuca sativa L. · Lettuce
Rijk Zwaan, NL
Allium fistulosum L. · Welsh onion
Mikado Kyowa Seed Co. Ltd. (JP)
Beta vulgaris Sugar Beet Group · Sugar beet
SAS FLORIMOND-DESPREZ Veuve et Fils
hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Enza Zaden Beheer B.V.
Beta vulgaris Sugar Beet Group · Sugar beet
SESVanderhave NV
Trifolium subterraneum L. · Subterranean clover
Seed Technology & Marketing Pty Ltd
Ficus lyrata Warb. · Banjo fig
Knaap, Eduard J. M. van der|Wilgenlei 15, 2665 KN Bleiswijk, Netherlands
Lupinus angustifolius L. · Narrow-leaf lupin
SPF Lupin
Trifolium subterraneum L. · Subterranean clover
Seed Technology & Marketing Pty Ltd
Phaseolus vulgaris L. · Common bean
Michigan State University