Diseases

Blackleg

Olpidium brassicae, Pythium debaryanum, Rhizoctonia solani, Thanatephorus cucumeris, Phoma lingam, Fusarium sp., Botrytis cinerea, Pectobacterium atrosepticum, Pectobacterium carotovorum

Blackleg is a group of diseases of the basal stem part caused by soil-borne fungi, oomycetes, or bacteria, leading to lodging and plant death. The disease is characterized by darkening and thinning of the stem, often accompanied by the rapid death of young seedlings and transplants.

Mentioned in descriptions 880 varieties reference book.

Blackleg is a complex of diseases affecting the basal zone of young plant stems, which triggers the appearance of constrictions, tissue water-soaking, and subsequent crop lodging. Depending on the plant species, the causative agents can be various fungi, oomycetes, or bacteria that induce rot, causing plants to lose stem strength and be easily pulled from the soil, while in the case of potatoes, they show signs of wilting and tuber decay.

Pathogen development is closely linked to soil conditions, such as high moisture, excessive watering, poor ventilation, and sharp temperature fluctuations. Agrotechnical factors, including dense planting and increased substrate acidity, significantly increase the risk of infection, which under unfavorable conditions is capable of destroying up to 100% of crops in a short period.

Variety resistance to blackleg is an important breeding trait, which in many crops has a polygenic nature and an additive mode of inheritance. Resistance evaluation in variety trials is conducted through artificial inoculation of tubers or stems under laboratory conditions, as well as through field observations in infection nurseries. The final degree of resistance is expressed in quantitative scores or percentage of infection, with tolerant forms being identified that are capable of maintaining productivity while infected.

Sources10

Breakdown by crop

Blackleg of potato 179 Blackleg of rapeseed 24 Black leg of carrot 16 Blackleg of tobacco 16 Blackleg of Rapeseed 12 Black leg — White cabbage 12 Damping-off of Cauliflower 4

Found in these crops

Potato 178 Sugar beet 38 Rapeseed 32 Rapeseed 16 Carrot 15 White cabbage 12 Cauliflower 4 Beet 2 Celery 1 Garden beet 1 Brown mustard 1 Red cabbage 1

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.

Maritiema

Active

Solanum tuberosum L. · Potato

MR.E.A.BOERHAVE

BE CZ DE DK ES FR +4

14 records

Valor

Active

Solanum tuberosum L. · Potato

Jack Dunnett

CZ LT MT NL

17 records

Alegria

Active

Solanum tuberosum L. · Potato

Wolfgang Walter

DE LT LU MT

14 records

Caruso

Active

Solanum tuberosum L. · Potato

Saka Pflanzenzucht, D

DE HR UA

16 records

Narbonne

Active

Daucus carota L. · Carrot

Bejo Zaden B.V.

BG CZ HU LT NL PL +2

12 records

Rudolph

Active

Solanum tuberosum L. · Potato

Andi John Gordon Gibson

HR NL PT UA

17 records

Soraya

Active

Solanum tuberosum L. · Potato

WOLFGANG Walter, DE

DE HR UA

16 records

Omega

Active

Solanum tuberosum L. · Potato

HETTEMA ZONEN B.V

DE IE UA

17 records

Lilly

Active

Solanum tuberosum L. · Potato

SOLANA GMBH & CO KG

CZ DE UA

14 records

Wega

Active

Solanum tuberosum L. · Potato

Wolfgang Walter, Norika Nordring - Kartoffelzucht - und Vermehrungs - GmbH Gross Lusewitz

DE UA

16 records

Volare

Active

Solanum tuberosum L. · Potato

MARIEN WINTERS

NL UA

16 records

Etana

Active

Solanum tuberosum L. · Potato

Heinrich Böhm

DE UA

13 records

Arosa

Active

Solanum tuberosum L. · Potato

ZIMMERMANN WILLI

DE HR HU IT LT SI +1

14 records

Vita Longa

Active

Daucus carota L. · Carrot

Bejo Zaden, NL

CZ HR HU NL PL SI

10 records

DK Exstorm

Active

Brassica napus var. napus · Rapeseed

Nelly Guguin, Jean-Pierre Despeghel,

CZ DE FR PL UA

14 records

Russet Burbank

Active

Solanum tuberosum L. · Potato

Pomorsko Mazurska Hodowla Ziemniaka Sp.z o.o. z siedziba w Strzekecinie

AT HR NL PL

18 records

Winston

Active

Solanum tuberosum L. · Potato

Jack Dunnett

IE LT NL

12 records

Red Sonia

Active

Solanum tuberosum L. · Potato

Heinrich BOHM, DE

NL UA

15 records

Romeo

Active

Solanum tuberosum L. · Potato

Teagasc Oak Park Research Centre

IE UA

15 records

Estrella

Active

Solanum tuberosum L. · Potato

Winfried Lange, Frank Lange

DE UA

16 records

Amany

Active

Solanum tuberosum L. · Potato

LAIRY-JOLY Gisele

FR NL

12 records

Charlotte

Active

Solanum tuberosum L. · Potato

UNICOPA (FR)/Clause Semences SA (FR)

BE DE DK FR LU NL

12 records

Ajiba

Active

Solanum tuberosum L. · Potato

Stet Holland B.V.

DK FR IT NL PL SK

11 records

Valisa

Active

Solanum tuberosum L. · Potato

VOGEL JOSEF

CZ DE LT LV PL

13 records

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Diseases

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Fusarium wilt and blight 29 887
Viral mosaic diseases 22 022
Downy mildew 16 384
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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.