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.
Beta vulgaris Sugar Beet Group · Sugar beet
SAS FLORIMOND-DESPREZ Veuve et Fils
Heuchera L. · Coral Flower
Janet N. Egger
Aglaonema Schott. · Chinese Evergreen
DR FRANK B. BROWN
Calibrachoa Cerv. · Calibrachoa
Ushio Sakazaki, Plant 21 LLC
Aeschynanthus Jack · Lipstick plant
Schouten Albert|Sleeuwijk, NL
Calibrachoa Cerv. · Calibrachoa
Ushio Sakazaki, Plant 21 LLC
Fragaria L. · Strawberry
The Regents of the University of California
Fragaria L. · Strawberry
The Regents of the University of California
Hibiscus moscheutos L. · Crimson-eyed rose mallow
Alain Tan
Humulus lupulus L. · Common hop
Roger D Jeske, Joe Brulotte
Guzmania Ruiz et Pav. · Guzmania
Nicolaas D.M. Steur^^^Elly Bak
Kniphofia Moench · Red hot poker
Janet N. Egger
Peperomia albovittata C. DC.
Smit Obed Jacob
Rubus idaeus L. · Red raspberry
Thompson Ellen
Rubus idaeus L. · Red raspberry
Thompson Ellen
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Ryojie Irie
Begonia L. · Begonia
LUBBERTUS H.KOPPE
Heuchera L. · Coral Flower
Janet N. Egger
Gerbera L. · Gerbera
FLORIST HOLLAND B.V.
Viburnum plicatum Thunb. · Japanese snowball
Wezelenburg Jan-Willem
Hordeum vulgare L. · Barley
University of Saskatchewan
Caryopteris incana (Thunb. ex Houtt.) Miq. · Bluebeard
Lunochkin, S.
Ipomoea batatas (L.) Lam. · Sweet potato
LaBonte Don R. / Villordon Arthur Q. / Smith Tara / Clark Christopher A.
Lavandula stoechas L. · French lavender
P.P.M. van der Salm Holding B.V., L. Koning Beheer B.V.