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.

Sierra Blanka F1/Serra Blanka F1

Active

Allium cepa L. · Onion

Hari Besels

1 record

Snizhana

Terminated

Triticum aestivum L. · Bread wheat

Morhun Volodymyr Vasylovych, Lohvynenko Valentyna Fedorivna, Lebedieva Halyna Danylivna, Chebakov Mykola Petrovych, Zhyvotkov Leonid Oleksandrovych,

1 record

Sherman F1

Terminated

Allium cepa L. · Onion

Ger Beemsterboer

1 record

Silberstar

Terminated

Chamaecyparis Spach · Chamaecyparis

HOEPKEN| Hans Juergen Hoepken

1 record

Sirmione

Active

Triticum L. · Wheat

BRUNORI ALBERTO / DE GIACOMETTI FRANCA / GENTILI PIETRO ANTONIO

1 record

Sharzh F1

Protection expired

Cucumis sativus L. · Cucumber

Suvorova Tetiana IAkovlivna, Khomchenko Nina Mykolaivna, Shevkunov Valerii Mykolaiovych, Shamshyna Hanna Viacheslavivna, Portiankin Oleksii IEvhenovych, Havrysh Serhii Fedorovych,

2 records

Sierra Blanca F1

Active

Allium cepa L. · Onion

Hari Besels

1 record

SC4391

Withdrawn

Zea mays L. · Maize

Syngenta Crop Protection AG

1 record

Seriale

Application submitted

Solanum lycopersicum L. · Tomato

Manier Tohumculuk

1 record

Sedona F1

Active

Allium cepa L. · Onion

Ger Bimsdeboer

1 record

Schedryk F1

Terminated

Cucumis sativus L. · Cucumber

Shevkunov Valerii Mykolaiovych, Prutens`ka Nataliia Oleksiivna, Shamshyna Anna Viacheslavovna, Portiankin Alieksiei IEvhenovych, Havrysh Serhii Fedorovych,

1 record

Semko 2010 F1

Terminated

Solanum lycopersicum L. · Tomato

Aleksieiev IUrii Borysovych

2 records

Sanmaxim XR

Application submitted

Solanum lycopersicum L. · Tomato

Axia NL B.V.

2 records

Sanmaxello XR

Application submitted

Solanum lycopersicum L. · Tomato

Axia NL B.V.

2 records

Rusticano

Active

Triticum L. · Wheat

MOLINELLI PAOLO

1 record

Sami z Vusamy

Active

Pisum sativum L. · Pea

Vovk Zhanna Mykolaivna

2 records

Safrane F1

Active

Allium cepa L. · Onion

Ger Bimsdeboer

1 record

Russkii stil` F1

Terminated

Cucumis sativus L. · Cucumber

Havrysh Serhii Fedorovych, Dubinin Serhii Volodymyrovych,

2 records

Rubaca

Terminated

Rubus L. · Blackberry

SCHIMMELPFENG| Hermann Schimmelpfeng / LAUN| Dipl.Ing. N. Laun Lehrstuhl fuer Obstbau der TU Muenchen

1 record

Rosamunda

Active

Solanum lycopersicum L. var. lycopersicum · Tomato

ISI SEMENTI SPA

1 record

Rigel

Application submitted

Arachis hypogaea L. · Peanut

Atlas Tohum Ziraat Ltd Sti

1 record

Rio corona

Withdrawn

Allium cepa L. var. cepa · Onion

Rio Colorado Seeds Inc. (US)

1 record

RINO

Terminated

Allium cepa L. var. cepa · Onion

ZETA SEEDS S.L.

1 record

Rojo

Terminated

Allium cepa L. · Onion

SUNSEEDS

1 record

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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.