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
SOLANA GMBH & CO KG
Brassica napus var. napus · Rapeseed
Pioneer Overseas Corporation US (USA)
Solanum tuberosum L. · Potato
Landbruks- og matdepartementet, N - 0030 Oslo
Solanum tuberosum L. · Potato
Christoph Gämperli
Brassica napus var. napus · Rapeseed
STRINGAM| Dr. Gary R. Stringam c/o Department of Agricultural Food and Nutritional Science, / DEGENHARDT| Delbert F. Degenhardt c/o Department of Agricultural Food and Nutritional Science,
Raphanus sativus L. var. niger (Mill.) S. Kerner · Black radish
Takii & Company Ltd
Brassica napus var. napus · Rapeseed
Advanta Semillas S.A.I.C., Pacífic Seeds Pty. Ltd.
Solanum tuberosum L. · Potato
Josef Schwarzfischer^^^Adolf Kellermann
Solanum tuberosum L. · Potato
VEREDELINGSBEDRIJF D. BIEMOND B.V.
Solanum tuberosum L. · Potato
SAKA-RAGIS PFLANZENZUCHT GBR
Solanum tuberosum L. · Potato
ZPC
Solanum tuberosum L. · Potato
VON KAMEKE KARTZ
Solanum tuberosum L. · Potato
UNIPLANTA SAATZUCHT KG
Solanum tuberosum L. · Potato
ROCUS PIETER GRAVELAND
Solanum tuberosum L. · Potato
WOLF&WOLF
Solanum tuberosum L. · Potato
Solana, D
Solanum tuberosum L. · Potato
SCHEHR MAURICE / HARM MULDER
Solanum tuberosum L. · Potato
Cooeperatie Agrico U.A.
Solanum tuberosum L. · Potato
WOLF & WOLF B.V.
Solanum tuberosum L. · Potato
van der Zee, G. / van der Zee, Pieter
Solanum tuberosum L. · Potato
Heinrich Böhm
Solanum tuberosum L. · Potato
S.HARTMANS/C.MEIJER BV
Solanum tuberosum L. · Potato
Solana Agrarproducte GmbH & Co
Solanum tuberosum L. · Potato
SAKA PFLANZENZUCHT GMBH AND CO KG