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.

TANJA

Withdrawn

Solanum tuberosum L. · Potato

Geertsema Zaden BV (NL)

1 record

Snihova koroleva

Protection expired

Brassica napus L. · Rapeseed

Sytnik Ihor Danylovych

2 records

SAPHIR

Terminated

Solanum tuberosum L. · Potato

KRAFFT (DE)

1 record

rosica

Terminated

Solanum tuberosum L. · Potato

SAKA PFLANZENZUCHT GBR

1 record

ROYAL VANTAGE F1

Terminated

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

Sakata Seed Corporation, JP

1 record

Rosalia

Terminated

Solanum tuberosum L. · Potato

SAKA PFLANZENZUCHT GBR

1 record

Psel`s`ka

Terminated

Solanum tuberosum L. · Potato

Mel`nyk Pavlo Oleksiiovych, Siharova Dina Dmytrivna, Kryshtal` Valentyna Ivanivna, Torchyts`ka Liudmyla Serhiivna, Voitenko Oleksandr Hryhorovych, Sakhoshko Mykola Mykolaiovych, Kozhushko Neli Semenivna,

2 records

Picra

Protection expired

Brassica juncea (L.) Czern. · Brown mustard

Ringot (FR)

1 record

Okhtyrskyi

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

Borysov Dmytro Vasylovych, Leibovych Anatolii Solomonovych, Rybak Volodymyr Oleksiiovych, Kulik Oleksandr Heorhiiovych, Roik Mykola Volodymyrovych,

2 records

Misato F1

Active

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

Yutaka Ishii

2 records

LINDORA

Terminated

Brassica napus var. napus · Rapeseed

DEUTSCHE SAATVEREDELUNG AG

2 records

Lena

Terminated

Solanum tuberosum L. · Potato

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

2 records

Koltan F1

Terminated

Daucus carota L. · Carrot

Khans Kole

1 record

Kanto

Active

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

Shevchenko Igor

2 records

Kanada F1/Canada F1

Active

Daucus carota L. · Carrot

Her Bimsdeboer

1 record

Hyola 474 CL

Terminated

Brassica napus L. · Rapeseed

Andrew Easton

1 record

Dryf

Terminated

Solanum tuberosum L. · Potato

Hodowla Roślin sp. z o.o. w Scholastykowie

1 record

DK Exstrorm

Terminated

Brassica napus L. · Rapeseed

MONSANTO TECHNOLOGY

1 record

Curaþao

Active

Daucus carota L. · Carrot

Bejo Zaden B.V.

2 records

Cordoba F1

Active

Daucus carota L. · Carrot

Ger Bimsdeboer

1 record

Belgrado F1

Active

Daucus carota L. · Carrot

Ger Bimsdeboer

1 record

Bogna

Terminated

Solanum tuberosum L. · Potato

Instytut Ziemniaka

1 record

Bekas

Terminated

Solanum tuberosum L. · Potato

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

2 records

Auris

Terminated

Helianthus annuus L. · Sunflower

Stupak Iryna IUriivna, Rusavskyi Vladyslav Leonidovych, Parii Myroslav Fedorovych, Parii IUliia Oleksandrivna, Kyryienko Serhii Oleksandrovych, Parii IAroslav Fedorovych, Parii Fedir Mykytovych,

2 records

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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.