Diseases
Phoma
Phoma rot is a group of fungal diseases manifesting as dry rots, stem necroses, and the appearance of characteristic black pycnidia dots. The disease affects a wide range of crops, causing significant yield losses both in the field and during storage.
Mentioned in descriptions 3 836 varieties reference book.
The disease manifests as the appearance of light brown to dark brown spots on leaves and stems, which can spread and infect the entire plant. Black dots, representing fungal pycnidia, form on the affected tissue areas, while depressed ulcers with a crumbling internal structure form upon infection of root crops and tubers.
The development of the pathogen depends on temperature conditions in the range of +10…+25°C and high air humidity exceeding 70–80%. The infection persists in the soil on plant debris for up to 3–6 years and is also transmitted through infected seeds, tubers, and root crops, which determines a high risk of spread in various climatic zones.
The assessment of variety resistance is carried out within the state variety testing system on specialized plots over several years. In field conditions, specialists conduct a visual scoring of plant infestation, which allows determining varietal responsiveness to the pathogen as an important economic and biological trait.
Varietal resistance to Phoma rot rarely constitutes full immunity and is considered an element of an integrated approach to crop protection. The selection of a resistant variety must be combined with adherence to crop rotation, returning the crop to the same field no earlier than after 3–4 years, and the use of healthy seed material.
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.
Brassica napus var. napus · Rapeseed
Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR
Helianthus annuus L. · Sunflower
Cvejic Sandra, Jocic Sinisa,
Helianthus annuus L. · Sunflower
Kalinichenko Artem Oleksandrovych, Didenko Kostiantyn Oleksandrovych,
Brassica napus var. napus · Rapeseed
Nickerson International Research S.N.C.
Helianthus annuus L. · Sunflower
Stupak Iryna IUriivna, Rusavskyi Vladyslav Leonidovych, Olkhovyk Maksym Stanislavovych, Kruhlova Marharyta Olehivna, Haidash Oleksandr Leonidovych, Bernadskyi Maksym Mykhailovych, Cherchel Vladyslav IUriiovych,
Helianthus annuus L. · Sunflower
EURALIS GENETIQUE
Allium cepa L. · Onion
Emerald Seed Company, CA 92243 El Centro, 1735 Austin Road, PO boksz 1670
Helianthus annuus L. · Sunflower
Kyrychenko Maryna Serhiivna, Babych Viktoriia Olehivna, Parii Fedir Mykytovych, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych,
Brassica napus var. napus · Rapeseed
Rob Wilson
Brassica napus var. napus · Rapeseed
PIONEER OVERSEAS CORPORATION
Helianthus annuus L. · Sunflower
Brassica napus var. napus · Rapeseed
MONSANTO (UK)
Brassica napus var. napus · Rapeseed
SYNGENTA WINTER OILSEED AB
Solanum tuberosum L. · Potato
Landbruks- og matdepartementet, N - 0030 Oslo
Helianthus annuus L. · Sunflower
EURALIS SEMILLAS, S.A.
Helianthus annuus L. · Sunflower
Frederic Poujaud
Helianthus annuus L. · Sunflower
Euralis Semences
Brassica napus var. napus · Rapeseed
Syngenta Participations AG
Brassica napus var. napus · Rapeseed
Breus Oksana Serhiivna, Davydiuk Ihor Mykolaiovych, Koval`chuk Zoreslava Volodymyrivna, Parii IUliia Oleksandrivna, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych, Parii Fedir Mykytovych,
Brassica napus var. napus · Rapeseed
Solomenko Andrii Ivanovych, Breus Oksana Serhiivna, Parii IUliia Oleksandrivna, Koval`chuk Zoreslava Volodymyrivna, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych,
Brassica napus L. · Rapeseed
W WEIBULL
Helianthus annuus L. · Sunflower
Terzic Sreten, Radeka Ilija, Jockovic Milan, Cvejic Sandra, Jocic Sinisa,
Helianthus annuus L. · Sunflower
Dusanic Nenad, Miklic Vladimir, Malidza Goran, Cvejic Sandra, Jocic Sinisa,
Helianthus annuus L. · Sunflower
Miklic Vladimir, Dusanic Nenad, Malidza Goran, Cvejic Sandra, Jocic Sinisa,