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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 Bread wheat 119 Onion 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.

MIYOROSCO

Active

Rhodanthemum hosmariense (Ball) B. H. Wilcox et al.

Miyoshi & Co.

2 records

Malling Allure

Active

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

NIAB EMR

3 records

Minova Magic

Active

Crassula ovata (Mill.) Druce · Jade plant

Ovata B.V.

2 records

Laredo

Active

Leucophyllum frutescens (Berland.) I. M. Johnst. x Leucophyllum zygophyllum I. M. Johnst.

Shipley Nicholas Benoit,Buhrow Russ A

2 records

Little Woody

Active

Cercis canadensis L. · Eastern redbud

Woody Paul Buddy Ewing|Morganton, NC 28655

2 records

Lemon Sorbet

Active

Verbascum L. · Mullein

Korlipara Harini|Canby, OR, US

2 records

Magic Wand

Active

Heuchera L. · Coral Flower

TERRA NOVA NURSERIES INC

2 records

Madrid

Terminated

Hibiscus rosa-sinensis L. · Chinese hibiscus

Coöperatieve Vereniging Werkgroep Hibiscus U.A.

2 records

Lemon

Active

Fittonia albivenis (Lindl. ex hort. Veitch) Brummitt · Nerve plant

Schoenmakers Tropische Potcultures V.O.F.

2 records

Little Giant

Active

Echinacea purpurea (L.) Moench · Purple coneflower

Korlipara Harini|Canby, OR, US

2 records

Malahat

Active

Rubus idaeus L. · Red raspberry

Pacific Agriculture and Agri-Food

5 records

Limelight

Active

Dracaena fragrans (L.) Ker Gawl. · Corn plant

GAMBOA CECILIANO JULIO

2 records

Kings Cross

Active

Fittonia albivenis (Lindl. ex hort. Veitch) Brummitt · Nerve plant

Schoenmakers Tropische Potcultures V.O.F.

2 records

Kolmarufa

Active

Symphoricarpos x doorenbosii Krüssm. · Coralberry

Kolster Holding B.V.

2 records

Keidopinul

Active

Petunia Juss. · Petunia

Shinya Miyano

2 records

Lambada

Active

Medinilla magnifica Lindl. · Rose grape

Franciscus Johannes Bakker

2 records

Jm1

Application submitted

Malus domestica (Suckow) Borkh. · Apple

YOSHIO YOSHIDA^^^SHICHIRO TSUCHIYA^^^Jun-ichi Soejima

3 records

HEWREB

Active

Daphne odora Thunb. · Winter daphne

Watson Steven|Yelverton, Devon PL20 7DQ, GB

2 records

Jm7

Active

Malus domestica (Suckow) Borkh. · Apple

YOSHIO YOSHIDA^^^SHICHIRO TSUCHIYA^^^Jun-ichi Soejima

3 records

JBG MH-17

Active

Hibiscus rosa-sinensis L. · Chinese hibiscus

James Berry

2 records

Kerbuzzby

Active

Petunia x atkinsiana D. Don · Garden petunia

Priscilla Grace Kerley^^^David William Kerley^^^Sarah Elisabeth Kerley^^^Timothy Edward Kerley

2 records

Kerbespicit

Active

Begonia x tuberhybrida Voss · Tuberous begonia

Timothy Edward Kerley^^^David William Kerley^^^Priscilla Grace Kerley^^^Sarah Elisabeth Kerley

2 records

Kerskyfan

Active

Petunia x atkinsiana D. Don · Garden petunia

Priscilla Grace Kerley, David William Kerley, Timothy Edward Kerley

2 records

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