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.

Sunmandecrikin

Terminated

Mandevilla boliviensis (Hook. f.) Woodson

Tomoya MISATO, Yasuyuki Murakami

1 record

Summer Breeze Snow

Active

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

ABZ Aardbeien uit Zaad Holding B.V.

2 records

Sunbird

Terminated

Hybrids between Echinacea purpurea (L.) Moench and Echinacea paradoxa (Norton) Britton

HARINI KORLIPARA

1 record

Summer Fiesta

Terminated

Agastache cana x Agastache pallidiflora

Janet N. Egger

1 record

Sunsurfviopiko

Terminated

Petunia Juss. · Petunia

Kazunari Iwaki^^^Shunsuke Takeuchi^^^Takeshi Kanaya^^^Yukihiro Ikeda

1 record

Silver Royalty

Withdrawn

Lavandula L. · Lavender

Koning Smit IPR S.A.

1 record

Supreme Elegance

Terminated

Hybrids between Echinacea purpurea (L.) Moench and Echinacea paradoxa (Norton) Britton

HARINI KORLIPARA

1 record

Summer Joy Red

Terminated

Portulaca oleracea L. · Common purslane

Sakata Seed Corporation (SCC)

1 record

Secret Pride

Terminated

Hybrids between Echinacea purpurea (L.) Moench and Echinacea paradoxa (Norton) Britton

HARINI KORLIPARA

1 record

SPICWIRL

Withdrawn

Chamaecyparis lawsoniana (A. Murray bis) Parl. · Lawson's cypress

Carole Spicer^^^Derek Spicer

1 record

Sene Nina 55

Application submitted

Pericallis x hybrida (Scheidw.) B. Nord. · Cineraria

Kiyoshi Miyazaki

1 record

Snow

Withdrawn

Lithodora diffusa (Lag.) I. M. Johnst. · Purple gromwell

Van Veen OZ B.V.

1 record

Snow Kiss

Active

Salvia L. · Sage

Hans A. Hansen

1 record

Snowflake

Terminated

Gerbera L. · Gerbera

FLORIST HOLLAND B.V.

1 record

Regal Splendour

Terminated

Lavandula L. · Lavender

Marilyn Wightman

1 record

Serendipity

Withdrawn

Allium nutans L. x Allium senescens L.

Eric M. Sal

1 record

Satin Nights

Terminated

Hybrids between Echinacea purpurea (L.) Moench and Echinacea paradoxa (Norton) Britton

HARINI KORLIPARA

1 record

Rhododendron Hybrid

Application submitted

Rhododendron catawbiense Michx. · catawba rhododendron

TYAS VERBRUGGE

1 record

Raspberry Tard

Withdrawn

Echinacea Moench. · Coneflower

HARINI KORLIPARA

1 record

Serenade

Withdrawn

Argyranthemum frutescens (L.) Sch. Bip. · Marguerite daisy

L.M.S. ApS

1 record

Rocca Verde

Terminated

Peperomia quadrangularis x Peperomia puteolata

Eden Collection B.V.

1 record

Rosaria

Application submitted

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

Stefan Kraege

1 record

Sakura

Active

Ipomoea batatas (L.) Lam. · Sweet potato

Don R. LaBonte

1 record

Purple Leia

Withdrawn

Veronica spicata L. · Spiked speedwell

Hans A. Hansen

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.