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.
Cucurbita pepo L. · Field pumpkin
FLOVEG GMBH
Triticum aestivum L. · Bread wheat
Citrus reticulata Blanco · Mandarin orange
Vardi Aliza/Spiegel-Roy Pinchas/Frydman-Shani Ahuva/Elchanati Avraham/Neumann Hana
Solanum lycopersicum L. · Tomato
Seminis Vegetable Seeds
Calibrachoa Cerv. · Calibrachoa
Yasuyuki Murakami
Raphanus sativus L. var. sativus · Radish
KONONOV ALEKSANDR NIKOLAEVICh / KAMPE EIKE
Lactuca sativa L. · Lettuce
VILMORIN-MIKADO USA
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Solanum lycopersicum L. · Tomato
Nunhems B.V.
Triticum aestivum L. · Bread wheat
Lietuvos agrarinių ir miškų mokslų centras
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Enza Zaden Beheer B.V.
Trifolium pratense L. · Red clover
Lietuvos agrarinių ir miškų mokslų centras
Triticum durum Desf. · Durum wheat
Solanum lycopersicum L. · Tomato
Syngenta Seeds B.V.
Allium porrum L. · Leek
NUNHEMS BV / NUNHEMS BV
Solanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
Pisum sativum L. · Pea
Syngenta Seeds B.V.
Medicago sativa L. · Alfalfa
NOVARTIS SEEDS
Lactuca sativa L. · Lettuce
Enza Zaden Beheer B.V.
Solanum lycopersicum L. · Tomato
Monsanto Vegetable IP Management B.V.
Solanum lycopersicum L. · Tomato
Syngenta Seeds B.V.