Diseases

Phoma rot

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.

Sources10

Breakdown by crop

Phoma stem canker of oilseed rape 529 Phoma black stem of sunflower 479 Phoma stem canker of rapeseed 215 Potato gangrene 12 Phoma Leaf Spot — Table Beet 3 Phoma rot of carrot 3 Phoma stem canker — white mustard 3

Found in these crops

Rapeseed 537 Sunflower 473 Rapeseed 213 Potato 12 Lemon 8 Onion 6 Garden beet 4 White mustard 3 Bread wheat 2 Melon 2 Rutabaga 2 Carrot 2

Varieties that feature this in their description

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.

Belarim

Application submitted

Helianthus annuus L. · Sunflower

Euralis Semences

1 record

Baster

Active

Helianthus annuus L. · Sunflower

Malinovskyi Serhii Volodymyrovych

2 records

Asedo

Active

Helianthus annuus L. · Sunflower

Tovarystvo z obmezhenoiu vidpovidalnistiu "KMK AHRO"

2 records

Archivar

Withdrawn

Brassica napus L. · Rapeseed

LIMAGRAIN EUROPE BIOPOLE CLERMONT-LIMAGNE

1 record

Arkona

Active

Helianthus annuus L. · Sunflower

Kopylov Serhii Ihorovych

2 records

Astun

Active

Helianthus annuus L. · Sunflower

Skakunenko, Vladyslava

2 records

AMAZONA

Terminated

Helianthus annuus L. · Sunflower

VERNEUIL RECHERCHE

2 records

Argo

Active

Helianthus annuus L. · Sunflower

APSOVSEMENTI S.P.A.

2 records

Arakar

Terminated

Helianthus annuus L. · Sunflower

Burlov Viktor Vasylovych

2 records

Almeria

Terminated

Helianthus annuus L. · Sunflower

Codisem, FR

2 records

Alfeo

Active

Helianthus annuus L. · Sunflower

APSOVSEMENTI S.P.A.

1 record

Al`fa

Terminated

Helianthus annuus L. · Sunflower

Berestenko Serhii Leonidovych, Scherban` Serhii Vasyl`ovych, Scherban` Natalia Fedorivna,

1 record

Allihator

Terminated

Anethum graveolens L. · Dill

Tsyunel` Mykhailo Mechyslavovych, Havrysh Serhii Fedorovych,

1 record

5038H

Active

Helianthus annuus L. · Sunflower

Euralis Semences

1 record

471R

Withdrawn

Helianthus annuus L. · Sunflower

Apex (FR)

1 record

807A

Withdrawn

Helianthus annuus L. · Sunflower

Dobroudja Agricultural Institute - General Toshevo (BG)

1 record

SULIKO 777

Active

Helianthus annuus L. · Sunflower

Karpenko Oleksandr Oleksandrovych, Luk'ianchyk IUrii Ivanovych,

2 records

Zhalon

Terminated

Helianthus annuus L. · Sunflower

Y.-M. Campion

1 record

VIOLIN

Active

Brassica napus L. · Rapeseed

Martin Frauen, Dieter Stelling

2 records

Torus

Terminated

Brassica napus var. napus · Rapeseed

Breus Oksana Serhiivna, Parii IUliia Oleksandrivna, Sydorov Andrii Valeriiovych, Parii IAroslav Fedorovych, Parii Myroslav Fedorovych,

1 record

Syntetik

Application submitted

Brassica napus L. · Rapeseed

Sytnik Ihor Dynylovych

2 records

Talmaz CL

Application submitted

Helianthus annuus L. · Sunflower

SEEDECO Semences SRL (MD)

1 record

Solaris OR

Active

Helianthus annuus L. · Sunflower

Miklic Vladimir Jocic Sinisa Dusanic NenadSandra Cvejic Milan Jockovic Zaitsev Oleksii Kovalov Volodymyr

2 records

Shelbi

Application submitted

Brassica napus L. · Rapeseed

Holubiev Kostiantyn Viktorovych, Parii Myrosla Fedorovych,

1 record

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Diseases

Powdery mildew 33 570
Fusarium wilt and blight 29 887
Viral mosaic diseases 22 022
Downy mildew 16 384
Leaf spot diseases 15 926
Rust 14 859
Verticillium wilt 12 175
Scab 12 064

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Text source

This summary is compiled from the publications listed in the sources and verified by an editor. It contains no legally significant information; it provides agronomic context for registry data rather than the registry data itself.