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.
Helianthus annuus L. · Sunflower
Yanul` Larysa Mykolaivna, Yanul` Viktor Pavlovych, Khrystov Mykhayl,
Brassica napus L. · Rapeseed
BUSCH HEINRICH
Brassica napus var. napus · Rapeseed
DEUTSCHE SAATVEREDELUNG AG
Brassica napus L. · Rapeseed
LIDEA FRANCE SAS
Helianthus annuus L. · Sunflower
Zhan-Liuk Madef
Brassica napus var. napus · Rapeseed
LIDEA FRANCE SAS
Helianthus annuus L. · Sunflower
LIMAGRAIN EUROPE S.A.
Helianthus annuus L. · Sunflower
LIMAGRAIN GENETICS S.A.
Helianthus annuus L. · Sunflower
LIMAGRAIN EUROPE S.A.
Brassica napus var. napus · Rapeseed
Limagrain Europe, FR
Helianthus annuus L. · Sunflower
Kapustian Maryna Viktorivna, Kapustian Volodymyr Vasylovych,
Helianthus annuus L. · Sunflower
LIMAGRAIN EUROPE
Helianthus annuus L. · Sunflower
Martin Gansmann
Brassica napus var. napus · Rapeseed
Sandrine LEGROS
Helianthus annuus L. · Sunflower
Hanenkov Ivan Ivanovych
Helianthus annuus L. · Sunflower
Malinovskyi Serhii Volodymyrovych
Helianthus annuus L. · Sunflower
Koval`ov Volodymyr Hryhorovych, Zaitsev Oleksii Borysovych,
Helianthus annuus L. · Sunflower
Kyrpychova Nataliia Mykhailivna, Vedmedieva Kateryna Vladyslavivna,
Brassica napus L. · Rapeseed
Pierre CASTELLANET
Brassica napus var. napus · Rapeseed
SARL ADRIEN MOMONT ET FILS, FR
Helianthus annuus L. · Sunflower
Makov`eva Nadiia Petrivnav, Kusch Viacheslav Stepanovych, Herasymenko Oksana Oleksandrivna, Pershyna Liliia Vasylivna, Dymytrov Heorhii Demianovych, Skakun Vadym Mykhailovych,
Helianthus annuus L. · Sunflower
Burlov Viktor Viktorovych, Burlov Viktor Vasylovych,
Brassica napus var. napus · Rapeseed
Patrice Jeanson
Helianthus annuus L. · Sunflower
Pryvatne Pidpryiemstvo "NASINNEVE"