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 B.V.
Lotus corniculatus L. · Bird's-foot trefoil
INSTITUTO NACIONAL DE INVESTIGACION AGROPECUARIA (INIA)
hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Vilmorin-Mikado S.A.S.
Pisum sativum L. · Pea
Lietuvos agrarinių ir miškų mokslų centras
Festuca arundinacea Schreb. · Tall fescue
MCCARTHY RESEARCH FARM
Nicotiana tabacum L. · Tobacco
Agroport-D, H
Nicotiana tabacum L. · Tobacco
Agroport-D, H
Lactuca sativa L. · Lettuce
Seminis Vegetable Seeds
Pisum sativum L. · Pea
Hurst, Gunson, Cooper, Taber, U.K.
Lactuca sativa L. · Lettuce
Harris Moran Seed Company
Triticum aestivum L. · Bread wheat
Institut national de recherche pour l'agriculture, l'aliment (FR)/Agri Obtentions SA (FR)
Rubus idaeus L. · Red raspberry
The James Hutton Institute
Prunus L. · Plum
Triticum aestivum L. · Bread wheat
Institut national de recherche pour l'agriculture, l'aliment (FR)/Agri Obtentions SA (FR)
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Malus Mill. · Apple
Solanum lycopersicum L. · Tomato
Seminis Vegetable Seeds
hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Vilmorin-Mikado S.A.S.
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Lactuca sativa L. · Lettuce
Syngenta Crop Protection AG
Medicago sativa L. · Alfalfa
Fragaria L. · Strawberry
Craig Chandler
Raphanus sativus L. var. sativus · Radish
Clause S.A.
Solanum lycopersicum L. · Tomato
RIJK ZWAAN ZAADTEELT EN ZAADHANDEL B.V.