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.

Topaz

Terminated

Medicago sativa L. subsp. sativa · Alfalfa

AGRIPRO SEEDS

1 record

Titus 71

Terminated

Trifolium pratense L. · Red clover

Saatzucht Steinach GmbH (DE)

1 record

Tribute

Terminated

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

Livestock and Seed Division (US)

1 record

Taresco F1

Active

Allium cepa L. · Onion

Willem P. Van haecke

1 record

Tannessee 90 Kat

Withdrawn

Nicotiana tabacum L. · Tobacco

Centralne Laboratorium Przemyslu Tytoniowego

1 record

Tamara F1

Active

Allium cepa L. · Onion

Ger Beemsterboer

1 record

Tistrata

Application submitted

Solanum lycopersicum L. · Tomato

Gautier Semences SAS (FR)

1 record

Talon F1

Withdrawn

Allium cepa L. · Onion

Ger Beemsterboer

1 record

SZ35

Active

Beta vulgaris Sugar Beet Group · Sugar beet

SES EUROPE, N.V./S.A.

1 record

Szarvasgedei

Active

Triticum monococcum L. · Einkorn wheat

Dr. Gyulai Ferenc Lajos, Szarvasgede

1 record

Sunstone

Active

Allium cepa L. · Onion

MARALDI SEMENTI S.r.l.

1 record

Sunkey

Active

Allium cepa L. · Onion

UNITED GENETICS SEEDS CO

1 record

SW3407

Application submitted

Medicago sativa L. subsp. sativa · Alfalfa

S&W SEED COMPANY

1 record

SVX23T00S47

Active

Glycine max (L.) Merr. · Soybean

Mark MacDuff

2 records

Stine 07J22

Active

Glycine max (L.) Merr. · Soybean

Pat Grams

2 records

SW3407

Application submitted

Medicago sativa L. · Alfalfa

Mark Smith

2 records

St. John's Fire

Withdrawn

Salvia splendens Sellow ex Schult. · Scarlet sage

CNOS Przedsiebiorstwo Nasiennictwa Ogrodniczego sp. z o.o.

2 records

Stylino

Application submitted

Solanum lycopersicum L. · Tomato

Enza Zaden Beheer B.V.

2 records

Speedax XR

Application submitted

Solanum lycopersicum L. · Tomato

Axia NL B.V.

2 records

Sotnytsia

Terminated

Triticum aestivum L. · Bread wheat

Skryplov Volodymyr Oleksandrovych, Morhun Bohdan Volodymyrovych, Bratuschak Serhii Petrovych, Artemchuk Iryna Petrivna, Morhun Volodymyr Vasylovych,

2 records

Snow Baby

Active

Narcissus L. · Daffodil

Kwekersvereniging Spectrum

1 record

Snihurka

Active

Triticum aestivum L. · Bread wheat

Volohdina Halyna Borysivna, Cheremkha Olena Maksymivna, Zamlila Nina Petrivna, Sorokin Volodymyr Valentynovych, Lebedeva Halyna Denysivna, Derhachov Oleksandr Leonidovych, Chebakov Mykola Petrovych, Zhyvotkov Leonid Oleksandrovych, Ulich Oleksandr Leonido

2 records

Solomiia

Terminated

Triticum aestivum L. · Bread wheat

Ushkarenko Viktor Oleksandrovych, Ranchevych Peter, Orliuk Anatolii Pavlovych, Lazer Petro Nartsysovych, Zhuzha Oleksandr Dmytrovych, Denchych Serbi Slav, Bazalii Valerii Vasyl`ovych,

4 records

Skaldis F1

Withdrawn

Allium cepa L. · Onion

Will van Haerke

2 records

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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.