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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 Alfalfa 53 Soybean 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.

Meditation

Active

Echinacea Moench. · Coneflower

Noort Marco van

3 records

Kui Nuku

Active

Hibiscus coccineus x Hibiscus moscheutos L.

Zwetzig Gretchen

4 records

Lucas

Active

Chamaecyparis obtusa (Siebold & Zucc.) Endl. · Hinoki cypress

Maatschaap C.P.F. Kools en M.H.Kools-Manders trading as Sierteeltkwekerij Kools

3 records

Jazzberry Jam

Active

Hibiscus L. · Hibiscus

Walters Gardens Inc

3 records

Jade Jewel

Active

Dracaena Vand. ex L. · Dracaena

Ruud A.M. Scheffers

3 records

Lavenite Petite

Active

Lavandula angustifolia Mill. · English lavender

V. McNaughton

3 records

KLEDP11109

Active

Dianthus caryophyllus L. · Carnation

MARTIN GLAWE|NILS KLEMM

3 records

JHE00202

Active

Helleborus x ericsmithii

Van Paemel Thierry

3 records

Hot Spot

Active

x Heucherella H. R. Wehrh. · Foamy bells

JANET NADINE EGGER

3 records

Lablusa

Active

Lavandula angustifolia Mill. · English lavender

Syngenta Seeds B.V.

3 records

Innemsunan

Active

Nemesia Vent. · Nemesia

Silvia Hofmann

3 records

Inkblot

Active

x Mangave D. Klein · Mangave

Hansen Hans A

3 records

Hope

Active

Peperomia deppeana x Peperomia quadrifolia

van der Velden Josephus M.

4 records

Kopper King

Active

Hibiscus L. · Hibiscus

Fleming, David W|8101 S. 14.sup.th St., Lincoln, NE 68512 / Fleming, James R|8101 S. 14.sup.th St., Lincoln, NE 68512

3 records

Kingscablin

Active

Scaevola aemula R. Br. · Fairy fan-flower

Patrick Courtney

3 records

Hinebud1

Active

Buddleja L. · Buddleia

Podaras Peter C.

4 records

HGC Joshua

Active

Helleborus niger L. · Christmas rose

Josef Heuger

3 records

Hawaiian Sunshine

Active

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

Fell, Jr. David N.

3 records

Dreamland

Active

Armeria pseudarmeria (Murray) Mansf.

Steve Eggleton, Howard Bentley, Plant Growers Australia

3 records

Green Star

Active

Gasteria Duval · Gasteria

Wander Tuinier B.V.

3 records

Evangeline

Active

Ipomoea batatas (L.) Lam. · Sweet potato

William B. Richardson

3 records

Frenzy

Active

Gaillardia x grandiflora hort. ex Van Houtte · Blanket flower

John A. Dixon

3 records

Fantasia

Active

Hibiscus L. · Hibiscus

FLEMING DAVID W.^^^Gretchen Zwetzig

3 records

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