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.

Crown Jewels

Active

Hibiscus L. · Hibiscus

FLEMING DAVID W.^^^Gretchen Zwetzig

3 records

D Tiga

Active

Gasteria Duval · Gasteria

Wander Tuinier B.V.

3 records

Boubri

Application submitted

Albizia julibrissin Durazz. · Mimosa

Bourquin, M. Andre|Borderez Sur Lechez, FR

4 records

Class Act

Active

Sedum L. · Ice Plant

TERRA NOVA NURSERIES INC

3 records

Clancy

Active

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

Weber Courtney A.|Geneva, NY, US / Sanford John C.|Livonia, NY, US / Maloney Kevin E.|Phelps, NY, US

3 records

Cascade Bounty

Active

Rubus idaeus L. · Red raspberry

Washington State University Puyallup Research and Extension Center

4 records

Black Pantha

Active

Agapanthus L'Hér. · Lily of the Nile

Grahame Morrison

3 records

Brasilia

Active

Peperomia caperata Yunck. · Emerald ripple peperomia

Per Siggaard Christensen, Garteneriet Tingdal ApS

3 records

Crawford

Active

Hybrids between Prunus cerasus and Prunus canescens

Iezzoni Amy

3 records

Balcaborim

Active

Calibrachoa Cerv. · Calibrachoa

Winslow Benjamin K. / Masor Laura L.

3 records

BC92915

Active

Rubus idaeus L. · Red raspberry

Kempler Chaim

4 records

Bluecrisp

Active

Vaccinium corymbosum L. · Highbush blueberry

PAUL M. LYRENE

6 records

Black Hero

Active

Zantedeschia Spreng. · Arum-lily

Sande B.V.

4 records

Belsemcob2

Active

Sempervivum arachnoideum L. · Cobweb houseleek

Gielis Jef

3 records

Belsemyel2

Active

Sempervivum arachnoideum L. · Cobweb houseleek

Gielis Jef

3 records

12ROSK1

Active

Delosperma cooperi (Hook. f.) L. Bolus · Trailing ice plant

Koichiro Nishikawa

3 records

Avesta

Active

Triticum aestivum L. · Bread wheat

GRABOVETS ANATOLIJ IVANOVICh / FOMENKO MARINA ANATOL'EVNA / KOLTUNOVA VALENTINA ALEKSEEVNA / ANDRIENKO VENERA USENOVNA / ShEVChENKO NINA ALEKSANDROVNA / GRITSENKO VERA VLADIMIROVNA

HU UA

5 records

Aspect

Terminated

Triticum aestivum L. · Bread wheat

JOHANNA BERGER ^^^JOSEF BERGER^^^Stephan Berger

4 records

Bernet

Terminated

Hordeum vulgare L. · Barley

Sejet Planteforaedling I,S

CZ SK

4 records

Speldorado

Active

Triticum aestivum L. subsp. spelta (L.) Thell. · Spelt

Danko Hodowla Roslin Sp.z.o.o.

5 records

Upper

Active

Solanum lycopersicum L. · Tomato

Syngenta Seeds B.V.

6 records

Topaz

Active

Glycine max (L.) Merr. · Soybean

SLOBODYaNIK NIKOLAJ SEMENOVICh / SINEGOVSKAYa VALENTINA TIMOFEEVNA / FOMENKO NATAL'Ya DMITRIEVNA / BELYaEVA GALINA NIKOLAEVNA

4 records

Prista 4

Active

Medicago sativa L. · Alfalfa

M. Mirchev, D. Dekov, D. Petkova, V. Toromanova

4 records

NS 2652

Active

Zea mays L. · Maize

MILISAV STOJAKOVIC / MILE IVANOVIC / BOJAN MITROVIC / DUSAN STANISAVLJEVIC

4 records

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Diseases

Powdery mildew 33 570
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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.