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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.

Blue Devil

Active

Solanum lycopersicum L. · Tomato

IT
1 record

Clarisse

Terminated

Lactuca sativa L. · Lettuce

NL
1 record

Amant F1

Active

Cucumis sativus L. · Cucumber

UA
2 records

Caramelo

Active

Zea mays L. · Maize

UA
2 records

Abelius F1

Terminated

Solanum lycopersicum L. · Tomato

UA
1 record

Abracadabra

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :Meinl K.

FR
2 records

VR4

Active

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

1 record

Augusta OZA

Application submitted

Allium cepa L. var. cepa · Onion

PL
1 record

Ásotthalmi12

Active

Ipomoea batatas (L.) Lam. var. batatas · Sweet-potato

HU
1 record

Bitspot

Terminated

Cucumis sativus L. · Cucumber

SK
1 record

TENNESSEE BEAUTY

Active

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

1 record

ABT 205

Withdrawn

Medicago sativa L. nothosubsp. varia (Martyn) Arcang. · Bastard Medic

EE
1 record

Armada

Terminated

Allium cepa L. · Onion

IT
1 record

Top Bental

Terminated

Solanum lycopersicum L. · Tomato

1 record

Rutrago

Active

Rubus idaeus L. · Red raspberry

2 records

Palmatum

Active

Rheum rhabarbarum L. · Rhubarb

1 record

Temple

Active

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

1 record

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