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.

MEDAILLON

Active

Allium cepa L. · Onion

WIJNKER THAAM

3 records

Leone

Active

Allium cepa L. · Onion

Ger Bimsdeboer

NL UA

3 records

Lucioso

Active

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL UA

6 records

Mattinaro

Active

Solanum lycopersicum L. · Tomato

Enza Zaden Bikhir B.V.

NL UA

3 records

Marsalato

Active

Solanum lycopersicum L. · Tomato

Kees Konst

NL UA

6 records

Kitonia

Terminated

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)

4 records

Kidance

Terminated

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)

ES FR

4 records

Kartier

Protection expired

Solanum lycopersicum L. · Tomato

Clause Tezier S.A., Bretigny (FR)

FR HR

3 records

Igloo

Active

Pisum sativum L. · Pea

Agri Obtentions SA (FR)/Institut National de la Recherche Agronomique (FR)

ES FR

3 records

Kornati

Active

Solanum lycopersicum L. · Tomato

Enza Zaden Bikhir B.V.

NL UA

5 records

Guyana

Terminated

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V. (NL)

HR NL

5 records

Gutek

Protection expired

x Triticosecale Wittm. ex A. Camus · Triticale

Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR

CZ PL

4 records

Gold Star

Active

Allium cepa L. · Onion

Daniel Maraldi

CY UA

4 records

Geyser

Active

Beta vulgaris Sugar Beet Group · Sugar beet

SESVANDERHAVE NV-SA, BE

DE FR

4 records

Jewel

Active

Fragaria L. · Strawberry

Sanford, John C.|Geneva, NY / Ourecky, Donald K.|Lauderdale Lakes, FL / Reich, Jack E.|II, Geneva, NY

BE IT

3 records

Galaxeen

Active

Solanum lycopersicum L. · Tomato

HM.Clause S.A.S.

FR UA

5 records

Fusapro

Active

hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner

VILMORIN, S.A.

ES FR

5 records

Foribo

Active

Beta vulgaris Fodder Beet Group · Mangelwurzel

SAS FLORIMOND-DESPREZ Veuve et Fils

BE FR

3 records

Florence

Protection expired

Fragaria L. · Strawberry

Simpson, D. W.

CZ HU

4 records

Impuls

Terminated

Zea mays L. · Maize

NORDSAAT| NORDSAAT Saatzuchtgesellschaft mbH

DE DK

3 records

Hytune

Active

Allium cepa L. · Onion

Martin Slot, John Pieter Schipper,

3 records

Fireball

Active

Allium cepa L. var. cepa · Onion

Seminis Vegetable Seeds

NL PL

3 records

Galant

Protection expired

Lupinus angustifolius L. · Narrow-leaf lupin

EGHØJGAARD ILC BIOLIFE

CZ DK

3 records

Fallera

Terminated

Allium cepa L. var. cepa · Onion

NUNZA BV

ES NL

3 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.