Diseases
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.
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.
Solanum tuberosum L. · Potato
PLANT BREEDING INTERNATIONAL CAMBRIDGE
Solanum tuberosum L. · Potato
Ludwig Simon
Daucus carota L. · Carrot
Robert Prieur
Solanum tuberosum L. · Potato
Walter DeJong, Cornell University
Daucus carota L. · Carrot
BEJO ZADEN
Solanum tuberosum L. · Potato
Teagasc Crops Research Centre
Solanum tuberosum L. · Potato
Sygnet PB, GB
Solanum tuberosum L. · Potato
Nordkartoffel Zuchtgesellschaft mbH
Beta vulgaris Sugar Beet Group · Sugar beet
STRUBE GMBH AND CO. KG
Brassica napus var. napus · Rapeseed
Ministry of Agriculture
Solanum tuberosum L. · Potato
SAATZUCHT FRITZ LANGE KG, DE
Brassica napus var. napus · Rapeseed
Andrew Easton
Brassica napus var. napus · Rapeseed
Nelly Guguin, Jean-Pierre Despeghel,
Beta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE and CO KGAA
Solanum tuberosum L. · Potato
W.WALLMULLER
Brassica napus var. napus · Rapeseed
Semences Cargill SA (FR)
Solanum tuberosum L. · Potato
SAKA PFLANZENZUCHT GMBH AND CO KG
Beta vulgaris Sugar Beet Group · Sugar beet
Strube, D
Solanum tuberosum L. · Potato
Cyngent Potato Breed. (GB)
Solanum tuberosum L. · Potato
SAATZUCHT FRITZ LANGE KG
Beta vulgaris Sugar Beet Group · Sugar beet
SAS FLORIMOND-DESPREZ Veuve et Fils
Solanum tuberosum L. · Potato
Teagasc
Apium graveolens L. · Celery
Bejo Zaden, NL
Solanum tuberosum L. · Potato
Teagasc Oak Park Research Centre