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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 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.

Kolmaori

Withdrawn

Salvia xjamensis J. Crompton · Jame sage

Kolster Holding B.V.

1 record

Kolmades

Terminated

Hypericum x inodorum Mill. · Tall tutsan

Floribreed V.O.F.

1 record

Kolmarrho

Active

Symphoricarpos x doorenbosii Krüssm. · Coralberry

Floribreed V.O.F.

1 record

HARLINONE

Terminated

Linaria purpurea (L.) Mill. · purple toadflax

Hardy's Cottage Garden Plants

1 record

HTR2204229

Application submitted

Solanum lycopersicum L. · Tomato

Axia NL B.V.

1 record

FUTTUNBLU

Terminated

Thunbergia erecta (Benth.) T. Anderson · Bush clockvine

Ronald Richard Hilder, Gloria Ellen May Hilder

1 record

Harmony

Withdrawn

Zantedeschia Spreng. · Arum-lily

Trevor Brljevich

1 record

Kiescaliblu

Terminated

Scabiosa japonica Miq.

Kieft Bloemzaden B.V.

1 record

GENCRIM

Terminated

Lobelia x speciosa Sweet

Peter M. Dealtrey

1 record

Gum Drop

Terminated

Echinacea purpurea (L.) Moench · Purple coneflower

HARINI KORLIPARA

1 record

Glen Rosa

Active

Rubus idaeus L. · Red raspberry

SCOTTISH CROP RESEARCH INSTITUTE

4 records

FLSAX19605

Active

Saxifraga x arendsii Engl. · Arends saxifrage

Florensis B.V.

1 record

Heintooga

Withdrawn

Vaccinium L. · Bilberry

James R. Ballington^^^William T. Bland

2 records

FLORVSBL1

Active

Veronica spicata L. · Spiked speedwell

Florensis B.V.

1 record

Ebony and Ivory

Terminated

Heuchera L. · Coral Flower

TERRA NOVA NURSERIES INC

1 record

Easy Clada

Withdrawn

Rhipsalis teres (Vell.) Steud.

PASSIE PLANT KWEKERIJ V.O.F.

1 record

Delice Hesperides

Application submitted

Salvia microphylla Kunth · Baby sage

Jan De Busschere

1 record

Don Tonio

Terminated

Kalanchoe blossfeldiana Poelln. · Flaming Katy

Nubilus B.V.

1 record

EURCA1710

Withdrawn

Echeveria agavoides Lem. · Molded wax agave

Euro Cactus Holland B.V.

1 record

FGDIP1RV

Terminated

Mandevilla splendens (Hook. f.) Woodson

Fury Genetics LLC

1 record

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