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 L. · Rapeseed
Lidea France SAS, Lescar FR
Brassica napus L. · Rapeseed
Lidea France SAS, Lescar FR
Helianthus annuus L. · Sunflower
Rustica Prograin Genetique SA (FR)/Institute of Field & Vegetable Crops (RS)
Helianthus annuus L. · Sunflower
MAS SEEDS
Solanum lycopersicum L. · Tomato
Axia Vegetable Seeds B.V.
Helianthus annuus L. · Sunflower
Dusanic Nenad, Miklik Vladimir, Malida Goran, Jocic Sinisa,
Helianthus annuus L. · Sunflower
MAS SEEDS
Allium cepa L. var. cepa · Onion
Bejo Zaden B.V., De Groot en Slot B.V.
Brassica napus var. napus · Rapeseed
Caussade Semences S.A.
Helianthus annuus L. · Sunflower
Luk'ianchyk IUrii Ivanovych, Karpenko Oleksandr Oleksandrovych, Parii IUliia Oleksandrivna, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych, Parii Fedir Mykytovych,
Brassica rapa L. subsp. pekinensis (Lour.) Hanelt · Napa cabbage
Shcevchenko Igor
Brassica napus var. napus · Rapeseed
SEMILLAS BATLLE, S.A.
Brassica napus var. napus · Rapeseed
Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR
Brassica napus L. · Rapeseed
NORDDEUTSCHE PFLANZENZUCHT LUBECK
Helianthus annuus L. · Sunflower
Kyrychenko Maryna Serhiivna, Babych Viktoriia Olehivna, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych,
Brassica napus L. · Rapeseed
Syngenta Crop Protection AG
Brassica napus var. napus · Rapeseed
Syngenta Crop Protection AG
Helianthus annuus L. · Sunflower
Syngenta Crop Protection,CH
Allium cepa L. var. cepa · Onion
Bayer Holland B.V.
Helianthus annuus L. · Sunflower
Parii Anna Fedorivna, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych, Parii Fedir Mykytovych,
Brassica napus var. napus · Rapeseed
Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR
Helianthus annuus L. · Sunflower
Kyrychenko Maryna Serhiivna, Babych Viktoriia Olehivna, Parii Fedir Mykytovych, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych,
Brassica napus var. napus · Rapeseed
NSW DEPARTMENT OF AGRICULTURE
Helianthus annuus L. · Sunflower
Valentina Encheva, Dimitar Petakov, Michael Christov, Alexander Piscov, Pepa Shindrova, Fota Tsvetkova, Peter Ivanov, Velko Velkov, Peter Petrov, Yordanka Stoyanova,