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.

PR 39 D 81

Active

Zea mays L. · Maize

Pioneer Overseas (US)

AT BG HU RO SI SK +1

17 records

KWS 6471

Active

Zea mays L. · Maize

LEIPERT RAINER

BG HU RO SI SK UA

11 records

PR 44 W 22

Active

Brassica napus var. napus · Rapeseed

Pioneer Overseas Corporation US (USA)

DK FR HR UA

9 records

PR 46 W 21

Active

Brassica napus var. napus · Rapeseed

PIONEER SALES| Pioneer Hi-Bred Northern Europe Sales Division GmbH

DE DK HR UA

9 records

POL'KA

Active

Phaseolus vulgaris L. · Common bean

PRZEDSIEBIORSTWO NASIENNICTWA

CZ PL UA

8 records

KWS 3381

Active

Zea mays L. · Maize

KWS, D

BG HU RO SI SK

9 records

DP 565

Active

Gossypium hirsutum L. · Upland cotton

Larry Burdett.

6 records

PHK 05

Active

Zea mays L. · Maize

PIONEER HI-BRED INTERNATIONAL

DE DK

6 records

DKC 5143

Active

Zea mays L. · Maize

MONSANTO TECHNOLOGY

AT HU SK UA

9 records

Merveille de Bollwiller

Active

Corylus avellana L. · Common hazel

WEISSMANN (FR)

ES FR NL

8 records

PR 39 G 83

Terminated

Zea mays L. · Maize

PIONEER HI-BRED INTERNATIONAL

DE IT UA

7 records

GSS 3071

Active

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

Syngenta Seeds B.V.

NL UA

5 records

GSS 5649

Active

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

SYNGENTA SEEDS B.V.

NL UA

5 records

GSS 8529

Active

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

Syngenta, NL

5 records

Heinz 2206

Active

Solanum lycopersicum L. · Tomato

HEINZSEED

HR PT

5 records

Hybriforce 600

Active

Medicago sativa L. · Alfalfa

Danielson Briggs Gardner

6 records

Bennett - Hickman

Active

Prunus dulcis (Mill.) D. A. Webb · Almond

James Bennett

6 records

Osmancik-97

Active

Oryza sativa L. · Rice

NECMI BESER, HALIL SUREK

BG UA

6 records

Boléro

Active

Daucus carota L. · Carrot

Vilmorin, F

BG CZ FR HR HU PL +2

20 records

Paulista

Active

Phaseolus vulgaris L. · Common bean

VEGETABLE MONSANTO B.V.

CZ HU NL PL SK UA

17 records

ES Mentor

Active

Glycine max (L.) Merr. · Soybean

P. Jeanson

AT FR HU IT RO SK +1

18 records

Preval

Active

Festuca pratensis Huds. · Meadow fescue

Zelder Holland(NL)

CZ DE FI FR LU NL +3

22 records

Pradel

Active

Festuca pratensis Huds. · Meadow fescue

Station des Recherches Agronomiques Changins RAC and DSP Ltd.

AT CZ DE HR LU NL +3

19 records

Unidor

Active

Phaseolus vulgaris L. · Common bean

SVS, NL

HU NL PL SI SK UA

16 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.