Diseases

Bacterial diseases

Pseudomonas, Xanthomonas, Pectobacterium, Ralstonia, Clavibacter, Agrobacterium, Bacillus, Streptomyces

Bacterial diseases are plant diseases caused by non-spore-forming rod-shaped bacteria, manifesting as rots, spots, and wilting. Due to diagnostic complexity and high pathogen variability, the selection of resistant varieties is the primary method for reducing yield losses.

Mentioned in descriptions 5 044 varieties reference book.

Bacterial diseases represent a group of disorders caused by pathogenic bacteria that enter plant tissues through stomata, natural openings, or mechanical injuries. External symptoms include soft and root rots, blights, wilting, and specific spotting with a yellow halo. Symptoms often mimic mineral deficiency, complicating visual diagnosis.

Pathogen development depends directly on environmental conditions, primarily the presence of free moisture and air temperatures in the range of 25–30 °C. High infection intensity can lead to significant crop losses, and in epiphytotic years, to total crop failure, making the analysis of varietal resistance a key element of agronomic strategy.

The evaluation of varietal resistance in variety trials is conducted visually based on the area of affected organs or by using an artificial inoculation background, where plants are infected with controlled strains. Resistant varieties exhibit a hypersensitive response — rapid tissue necrosis at the site of pathogen entry, which limits the spread of infection within the plant.

The efficacy of varietal protection depends on the specificity of the variety to particular races or strains of the pathogen. Agronomists are advised to account for the high genetic variability of bacteria, due to which varietal resistance may change over time, and to pay attention to verified data on resistance to local pathogen populations.

Sources10

Breakdown by crop

Fire blight of apple 398 Fire Blight of Pear 285 Bacterial Diseases of Common Bean 215 Bacterial diseases of cabbage 127 Fire Blight of Apple 119 Bacterial blight of walnut 83 Tomato bacterioses 69 Bacterial Diseases of Soybean 67 Bacterial diseases of sweet corn 41 Bacterial diseases of maize 33 Bacterial angular leaf spot of cucumber 30 Fire blight of quince 28 Bacterial Spot of Pepper 28 Bacterial diseases — cauliflower 24 Bacterial Diseases of Alfalfa 22 Bacterial diseases of oilseed rape 21 Bacteriosis — Italian ryegrass 19 Bacterial Diseases of Pear 15 Bacterial Canker of Sour Cherry 15 Bacterial Blight of Pea 14 Bacterial blight of hazelnut 14 Bacterial Wilt of Italian Ryegrass 13 Bacterioses of perennial ryegrass 13 Bacterial diseases of maize 13

Found in these crops

Common bean 200 Persian walnut 76 Soybean 67 Tomato 66 White cabbage 54 Sweet corn 41 Maize 32 Alfalfa 30 Cucumber 28 Bell pepper 24 Rapeseed 20 Italian ryegrass 19

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.

Madras

Active

Pisum sativum L. · Pea

Toft Plant Breeding APS

6 records

Win

Protection expired

Phaseolus vulgaris L. · Common bean

Seminis Vegetable Seeds

6 records

Tambora

Active

Phaseolus vulgaris L. · Common bean

Pop Vriend, NL

6 records

Sweetstar

Active

Zea mays L. subsp. mays (Sweet Corn Group) · Sweet corn

Syngenta Seeds B.V.

4 records

Stirling

Active

Solanum tuberosum L. · Potato

SCOTTISH RESEARCH INSTITUTE

5 records

Stormram

Application submitted

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

5 records

Summer 3373

Active

Actinidia Lindl. · Actinidia

Vincenzo Ossani

4 records

Stanley

Active

Phaseolus vulgaris L. · Common bean

Holland-Select Research B.V.

6 records

Silvius

Active

Lolium multiflorum Lam. · Italian ryegrass

SAATZUCHT STEINACH GMBH and CO KG

6 records

Serpentine

Active

Brassica oleracea L. (Savoy Cabbage Group) · Savoy cabbage

Hazera, NL

4 records

Salyna

Active

Zea mays L. subsp. mays (Sweet Corn Group) · Sweet corn

CROOKHAM COMPANY

4 records

Salaria

Active

Lolium x hybridum Hausskn. · Hybrid ryegrass

Agroscope, CH

5 records

Royka

Active

Glycine max (L.) Merr. · Soybean

ING. MIROSLAV KADLEC

5 records

Ralstor

Active

Solanum lycopersicum L. · Tomato

Jean-Franҫois Grillat

5 records

Rege

Active

Phaseolus vulgaris L. · Common bean

ZKI, H

4 records

Plano

Active

Phaseolus vulgaris L. · Common bean

Nickerson-Zwaan B.V., NL-2990 AA Barendrecht

5 records

Pelayo

Active

Lactuca sativa L. · Lettuce

Enza Zaden Beheer B.V.

6 records

Newcastle

Active

Daucus carota L. · Carrot

BEJO ZADEN

5 records

Meccano

Active

Phaseolus vulgaris L. · Common bean

OLTER SRL

5 records

Logon

Active

Phaseolus vulgaris L. · Common bean

Syngenta Crop Protection AG

6 records

Maggyl

Active

Lolium multiflorum Lam. · Italian ryegrass

RAGT 2N S.A.S

4 records

L70

Active

Medicago sativa L. · Alfalfa

Tom Damin, Pasture Genetics Pty Ltd

5 records

Lewis

Active

Phaseolus vulgaris L. · Common bean

Robert J. Gehin.

5 records

Kendo

Active

Phaseolus vulgaris L. · Common bean

W BROTHERTON SEED CO INC

5 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

All terms →

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.