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.
Zea mays L. · Maize
PIONEER OVERSEAS CORPORATION
x Triticosecale Wittm. ex A. Camus · Triticale
RAGT 2n
Beta vulgaris Sugar Beet Group · Sugar beet
Societe Europeenne de Semences NV/SA (BE)
Glycine max (L.) Merr. · Soybean
STINE SEED CO.
Zea mays L. · Maize
Syngenta Crop Protection AG
Pisum sativum L. · Pea
Selgen, a.s. Vyzkumne centrum SELTON, s.r.o.
Allium cepa L. · Onion
Nunhems, NL
Medicago sativa L. · Alfalfa
Tomasich Josef
Cucumis sativus L. · Cucumber
SATIMEX QUEDLINBURG HANDELSGESELLSCHAFT GmbH
Beta vulgaris Sugar Beet Group · Sugar beet
Syngenta Crop Protection AG
Beta vulgaris Sugar Beet Group · Sugar beet
STRUBE HERMANN| Dr. Hermann Strube
Hordeum vulgare L. · Barley
Nordsaat Saatzuchtgesellschaft mbH
Triticum aestivum L. · Bread wheat
SAATZUCHT J.BREUN GDBR
Kalanchoe Adans. · Kalanchoe
Vlielander, Ike|De Lier, Netherlands
Solanum lycopersicum L. · Tomato
Syngenta Seeds BV (NL)
Lactuca sativa L. · Lettuce
Paragon Seed, Inc.
Beta vulgaris Sugar Beet Group · Sugar beet
MariboHilleshög ApS
Triticum durum Desf. · Durum wheat
SEMILLAS FITO' S.A.
Beta vulgaris Sugar Beet Group · Sugar beet
WIELKOPOLSKA HODOWLA BURAKA CUKROWEGO SP.Z.O.O
Vicia sativa L. · Common vetch
Jouffray-Drillaud SA (FR)
Solanum lycopersicum L. · Tomato
Syngenta Seeds BV (NL)
x Triticosecale Wittm. ex A. Camus · Triticale
SW Seed BV
Phaseolus vulgaris L. · Common bean
Seminis Vegetable Seeds
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)