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.

Katka

Protection expired

1 record

Zhuravynka

Withdrawn

Solanum tuberosum L. · Potato

Portiankin Dmytro IEvhenovych, Kozlova Liudmyla Mykolivna, Piskun Heorhii Ivanovych,

2 records

Zluka

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

Borysova Tetiana Oleksandvivna, Borysova Larysa Serhiivna, Fedorenko Inha Anatoliivna, Mel`nychuk IUrii Viktorovych, Mel`nyk Nadiia Serhiivna, Malihon Halyna Serhiivna, Zmiievs`kyi Volodymyr Mykolaiovych, Chemerys Lina Mykolaivna, Panov Mykhailo Ivanovych

2 records

Violetto

Application submitted

Ocimum basilicum L. · Basil

PUBBLICO DOMINIO

1 record

Venta

Terminated

Solanum tuberosum L. · Potato

Lietuvos agrarinių ir miškų mokslų centro Vokės filialas

1 record

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Diseases

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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.