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 Onion 2 Alfalfa 2 Maize 2 Sugar beet 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.

LG5639

Protection expired

Helianthus annuus L. · Sunflower

2 records

Felix

Terminated

Helianthus annuus L. · Sunflower

2 records

AS 33101

Active

Helianthus annuus L. · Sunflower

2 records

AS 35114

Active

Helianthus annuus L. · Sunflower

3 records

Skara CL

Application submitted

Brassica napus L. · Rapeseed

Norddeutsche Pflanzenzucht Hans-Georg Lembke KG

1 record

PKh128

Terminated

Brassica napus var. napus · Rapeseed

Konrad Krailing

1 record

LID Incanto

Active

Brassica napus var. napus · Rapeseed

Lidea France SAS, FR

2 records

YeS Avalon

Active

Helianthus annuus L. · Sunflower

Posunko Anton Olehovych, Shatsman Dmytro Oleksandrovych,

2 records

YeS Bravus

Active

Helianthus annuus L. · Sunflower

Posunko Anton Olehovych, Bushulian Oleh Volodymyrovych, Shatsman Dmytro Oleksandrovych,

2 records

Vikos

Application submitted

Allium cepa L. var. cepa · Onion

Bakker Brothers Gebroeders Bakker Zaadteelt en Zaadhandel BV

1 record

V3002

Withdrawn

Brassica napus L. · Rapeseed

CARGILL

1 record

Toskana

Terminated

Helianthus annuus L. · Sunflower

Kovalov Volodymyr Hryhorovych, Zaitsev Oleksii Borysovych,

2 records

Toskama

Terminated

Brassica oleracea L. (White Cabbage Group) · White cabbage

MARNER GZG| Rijk Zwaan Marne Aktiengesellschaft

1 record

Teron

Active

Brassica napus var. napus · Rapeseed

Tovarystvo z obmezhenoiu vidpovidalnistiu «TK ART-AHRO»

2 records

Terner

Active

Helianthus annuus L. · Sunflower

Tovarystvo z obmezhenoiu vidpovidalnistiu «TK ART-AHRO»

2 records

SY Romeo

Withdrawn

Brassica napus var. napus · Rapeseed

Deutsche Saatveredelung AG - DSV (DE)

1 record

STR456

Terminated

Helianthus annuus L. · Sunflower

Seedtec International Inc (US)

1 record

Soltan

Active

Helianthus annuus L. · Sunflower

Hyskie Ivan Mykolaiovych, Bohdan Ihor` Vyktorovych,

2 records

SPAN

Terminated

Brassica napus var. napus · Rapeseed

Ministry of Agriculture

1 record

Smaraht

Protection expired

Brassica napus L. · Rapeseed

Sholomkevych Ivanna Myronivna, Abramyk Mykhailo Ivanovych, Sytnik Ihor Danylovych,

2 records

Snihova koroleva

Protection expired

Brassica napus L. · Rapeseed

Sytnik Ihor Danylovych

2 records

Senator Liuks

Terminated

Brassica napus var. napus · Rapeseed

Oliinyk IEvheniia Ivanivna, Boiko IEvheniia Illivna, Moroz Viktor Mykolaiovych,

1 record

SERELIA

Active

Helianthus annuus L. · Sunflower

Joel Meunier

1 record

ROMEO PS 9601

Withdrawn

Brassica napus var. napus · Rapeseed

Raps GbR

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.