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 Alfalfa 53 Soybean 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.

Prolific Persian

Terminated

Trifolium resupinatum L. · Persian clover

SEEDCO

3 records

Profance

Active

Solanum lycopersicum L. · Tomato

Monsanto Vegetable IP Management B.V.

5 records

Pleven 6

Active

Medicago sativa L. · Alfalfa

Z. Angelov, A. Ibraimov

4 records

Plaisance

Active

Solanum lycopersicum L. · Tomato

De Ruiter Seeds B.V.

4 records

Paronema

Active

Solanum lycopersicum L. · Tomato

Syngenta Crop Protection AG

3 records

Pallagi 5

Active

Nicotiana tabacum L. · Tobacco

Agtotab, H

4 records

Parole

Active

Lactuca sativa L. · Lettuce

Syngenta Seeds B.V.

7 records

Operet

Active

Solanum lycopersicum L. · Tomato

Syngenta Seeds, NL

3 records

OAC Madoc

Active

Glycine max (L.) Merr. · Soybean

Istvan Rajcan

4 records

OAC Brooke

Active

Glycine max (L.) Merr. · Soybean

Istvan Raikan

4 records

NS 5655

Active

Sorghum bicolor (L.) Moench · Sorghum

CIRCLE M FARMING

3 records

Normanno

Active

Triticum durum Desf. · Durum wheat

Societa Produttori Sementi S.p.A

4 records

OAC Strive

Active

Glycine max (L.) Merr. · Soybean

UNIVERSITY OF GUELPH

4 records

OAC Hastings

Active

Glycine max (L.) Merr. · Soybean

UNIVERSITY OF GUELPH

4 records

NEMAGUARD

Active

hybrids between Prunus davidiana and Prunus persica

United States Department of Agriculture -USDA-

4 records

MOUNT BARKER

Active

Trifolium subterraneum L. · Subterranean clover

NEW SOUTH WALES, DEP.AGR.

4 records

Nirvanus

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

4 records

Mikka

Active

Pisum sativum L. · Pea

NORDIC SEED

7 records

Mozayik

Active

Cucumis sativus L. · Cucumber

Ali Yuksel

4 records

Minoprio

Active

Solanum lycopersicum L. · Tomato

HM.Clause S.A.S.

4 records

Montague

Active

Solanum lycopersicum L. · Tomato

Enza Zaden Beheer B.V.

5 records

Miliari

Active

Cichorium endivia L. · Endive

Enza Zaden Beheer B.V.

6 records

Mr. S. 2/5

Active

Prunus cerasifera Ehrh. · Cherry plum

3 records

Mitika

Active

Beta vulgaris Sugar Beet Group · Sugar beet

AURORA S.R.L.

4 records

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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.