Diseases

Root rots

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.

Sources10

Breakdown by crop

Root rots — common wheat 125 Root rots of sugar beet 75 Pea Root Rots 73 Tomato root rot 72 Raspberry root rots 55 Root rots — garden strawberry 47 Root rots of lettuce 43 Alfalfa Root Rot 40 Cucumber root rot 40 Tobacco root rots 35 Barley root rots 35 Maize Root Rots 33 Root rots of soybean 29 Root rots — red clover 20 Root rots — Onion 17 Root rots of Calibrachoa 17 Apple root rot 16 Bean root rots 15 Root rots — Onion 13 Root rots — durum wheat 13 Apple Root Rots 11 Root rots of triticale 10 Root rots of subterranean clover 10 Maize root rot 8

Found in these crops

Tomato 573 Sugar beet 141 Onion 136 Onion 119 Bread wheat 119 Garden strawberry 91 Pea 75 Red raspberry 64 Lettuce 60 hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner 58 Soybean 53 Alfalfa 53

Varieties that feature this in their description

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.

Enigma

Withdrawn

Zea mays L. · Maize

ADVANTA| Advanta GmbH

1 record

Elsa

Active

Solanum lycopersicum L. · Tomato

Tovarystvo z obmezhenoiu vidpovidalnistiu "SPARK SIDZ"

2 records

Djebel 169

Terminated

Nicotiana tabacum L. · Tobacco

Ruska G. Peeva, Boyan I. Bakalov

1 record

Dzhekon F1

Terminated

Cucumis sativus L. · Cucumber

Pozniak Oleksandr Vasyl`ovych, Pluzhnikova Liudmyla IEhorivna, Kryvets` Dmytrii Olehovych, Lisitsyn Volodymyr Mykolaiovych, Bakumenko Nadiia Vasylivna, Petrenko Mariia Petrivna,

2 records

Divino F1

Terminated

Allium cepa L. · Onion

Hari Besels

1 record

Doryan

Active

Allium cepa L. · Onion

UNITED GENETICS SEEDS CO

1 record

Damascus F1

Terminated

Allium cepa L. · Onion

Scott Hendricks

2 records

Dalton

Terminated

Schefflera arboricola (Hayata) Hayata ex Merr. · Dwarf umbrella tree

Kwekerij Nederpelt V.o.f.

1 record

DKC6236

Withdrawn

Zea mays L. · Maize

MONSANTO TECHNOLOGY

1 record

Costral

Terminated

Solanum lycopersicum L. · Tomato

Vilmorin SA (FR)

2 records

De Valence

Terminated

Allium cepa L. var. cepa · Onion

Domaine Public (FR)

1 record

CONGA

Terminated

Cordyline Comm. ex Juss. · Palm lily

DE COOMAN FERNAND

1 record

CT13

Terminated

Gossypium hirsutum L. · Upland cotton

Seed Source Inc.

1 record

CL-Q-721/125

Active

Castanea sativa Mill. · Sweet chestnut

PEDRO URQUIJO LANDALUCE

1 record

COPPER BALL

Active

Allium cepa L. · Onion

UNITED GENETICS SEEDS CO

2 records

Colibri F1

Active

Solanum lycopersicum L. · Tomato

Robert Priieur

2 records

Daizy

Active

Solanum lycopersicum L. · Tomato

Dong-Wook Cho

2 records

Crusher

Application submitted

Allium cepa L. var. cepa · Onion

Bayer Holland B.V.

1 record

Changins

Terminated

Trifolium pratense L. · Red clover

RAC Station federale de recherches agronomiques de Changins (CH)

1 record

Cuba Moon

Application submitted

Solanum lycopersicum L. · Tomato

Enza Zaden Beheer B.V.

2 records

Charodii

Terminated

Helianthus annuus L. · Sunflower

Hanzhelo Mykola Hryhorovych, Krut`ko Vasyl` Ivanovych, Karapira Serhii Ivanovych, Varenyk Borys Fedorovych, Syvenko Oleksandr Anatoliiovych, Syvenko Valentyna Ivanivna, Kolomatska Valeriia Pavlivna, Makliak Kateryna Mykolaivna, Kyrychenko Viktor Vasylovyc

2 records

Charger

Terminated

Prunus avium (L.) L. · Sweet cherry

EAST MALLING RESEARCH ST. (GB)

1 record

CHARGER

Withdrawn

Prunus cerasus L. · Sour cherry

EAST MALLING RESEARCH ST. (GB)

1 record

Charleston F1

Terminated

Solanum lycopersicum L. · Tomato

Erik Bastet

1 record

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Diseases

Powdery mildew 33 570
Fusarium wilt and blight 29 887
Viral mosaic diseases 22 022
Downy mildew 16 384
Leaf spot diseases 15 926
Rust 14 859
Verticillium wilt 12 175
Scab 12 064

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Text source

This summary is compiled from the publications listed in the sources and verified by an editor. It contains no legally significant information; it provides agronomic context for registry data rather than the registry data itself.