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.

Rhino

Active

Allium cepa L. · Onion

Gerard Balder

3 records

Roterno

Active

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL UA

4 records

Recordina KWS

Active

Beta vulgaris Sugar Beet Group · Sugar beet

Dietrich Hauer, Madlaina Peter,

DE UA

3 records

Peso

Active

Allium cepa L. · Onion

Ger Bimsdeboer

3 records

Primot Smart

Active

Beta vulgaris Sugar Beet Group · Sugar beet

SESVANDERHAVE, N.V./S.A.

ES UA

3 records

Promarsa

Active

Solanum lycopersicum L. · Tomato

Syngenta Crop Protection AG

NL UA

4 records

Pyrolusite

Active

Cichorium intybus L. (Industrial Chicory Group) · Chicory

S.A.S. Florimond Desprez Veuve & Fils

FR NL

4 records

Platine

Active

Cichorium intybus L. · Chicory

Vilmorin SA (FR)

FR PL

3 records

Perla

Protection expired

Allium cepa L. var. cepa · Onion

Texas Agricultural Experiment Station

HR NL

3 records

P92440

Active

Zea mays L. subsp. mays (Maize Group) · Maize

PIONEER OVERSEAS CORPORATION

CZ ES

3 records

Orangino

Terminated

Solanum lycopersicum L. · Tomato

Bernardus van den Bosch

NL UA

3 records

New Wonder

Withdrawn

Scaevola aemula R. Br. · Fairy fan-flower

Grüber, Garry

DK SE

3 records

Pegase

Active

Allium cepa L. var. cepa · Onion

SAKATA VEGETABLES EUROPE SAS

ES FR

3 records

Mv 270

Active

Zea mays L. · Maize

Szundy Tamas, Geza Hadi, Csaba L. Marton,

HU UA

3 records

P9975

Active

Zea mays L. subsp. mays (Maize Group) · Maize

PIONEER OVERSEAS CORPORATION

CZ PL

3 records

Milaneza

Terminated

Solanum lycopersicum L. · Tomato

Kees Konst

NL UA

6 records

Merkury

Terminated

Solanum lycopersicum L. · Tomato

Produkcja i Hodowla Roslin Ogrodniczych Krzeszowice sp. z o.o.

BG PL

3 records

NK Symba

Active

Zea mays L. · Maize

Syngenta Crop Protection AG

DE IT

4 records

Marsupial Smart

Active

Beta vulgaris Sugar Beet Group · Sugar beet

SESVanderhave NV

IT UA

3 records

Meeker

Active

Rubus idaeus L. · Red raspberry

Washington State University Research Foundation (US)

FR NL

9 records

Mozart

Active

Glycine max (L.) Merr. · Soybean

Semican INC (CA)

HR UA

4 records

Maxeza

Active

Solanum lycopersicum L. · Tomato

Kees Konst

NL UA

6 records

Lipstick

Active

Anthurium Schott · Anthurium

Vletter, Marinus|Waddinxveen, Netherlands

DE NL

3 records

Merlice

Active

Solanum lycopersicum L. · Tomato

Bernardus van den Bosch

NL UA

6 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.