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. subsp. mays (Maize Group) · Maize
Syngenta Crop Protection AG, Seeds Division, CH
Solanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
Allium cepa L. var. cepa · Onion
Hazera Seeds B.V.
hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
CAPITAL GENETIC EBT, S.L.
Triticum aestivum L. · Bread wheat
Oregon State University
Triticum aestivum L. · Bread wheat
Rybalka Oleksandr Illich, Babaiants Lazar Tihranovych, Reshetnikova Valentyna Semenivna, Solomonov Ruslan V'iacheslavovych, Maksymov Mykola Havrylovych, Holub IEvheniia Anatoliivna, Rubakha Serhii Andriiovych, Lytvynenko Raisa Ivannivna, Honcharuk Nina Ol
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Solanum lycopersicum L. · Tomato
Syngenta Seeds B.V.
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Triticum aestivum L. · Bread wheat
Siroshtan Andrii Anatoliiovych, Siroshtan Andrii Anatoliiovych, Dubovyk Nataliia Serhiivna, Khomenko Svitlana Olehivna, Derhachov Oleksandr Leonidovych, Zamlila Nina Petrivna, Kolomiiets` Lidiia Andriivna, Yurchenko Tetiana Vasylivna, Kyrylenko Vira Vikto
Solanum lycopersicum L. · Tomato
Nunhems B.V.
Juniperus x pfitzeriana (Späth) P. A. Schmidt · Pfitzer juniper
Vorobiova Olena Anatoliivna
Allium cepa L. var. cepa · Onion
CROOKHAM COMPANY
Vicia faba L. var. minuta (hort. ex Alef.) Mansf. · Tick Bean
INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR
Allium cepa L. · Onion
Albert Burkett
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
Solanum lycopersicum L. · Tomato
Axia Vegetable Seeds B.V.
Solanum lycopersicum L. · Tomato
Gautier Semences SAS (FR)
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
University of Maryland (US)/Livestock and Seed Division (US)
Solanum lycopersicum L. · Tomato
Syngenta Seeds B.V.
hybrids between Prunus davidiana and Prunus persica
Solanum lycopersicum L. · Tomato
Gautier Semences SAS (FR)
Solanum lycopersicum L. · Tomato
Axia Vegetable Seeds B.V.
Solanum lycopersicum L. · Tomato
Gautier Semences SAS (FR)