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 Maize 2 Sugar beet 2 Field mustard 2 Bread wheat 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.

ES Hidromel`

Terminated

Brassica napus var. napus · Rapeseed

Zhan-Liuk Madef

1 record

ESH6009

Withdrawn

Helianthus annuus L. · Sunflower

Euralis Semences

1 record

ES HENEZIS

Active

Helianthus annuus L. · Sunflower

Didier Sauvaire

2 records

ES Alfil

Withdrawn

Helianthus annuus L. · Sunflower

Euralis Semences

1 record

ES Shana

Withdrawn

Helianthus annuus L. · Sunflower

Euralis Semences FR

1 record

ES Astrid cms

Active

Brassica napus L. · Rapeseed

Patrice Jeanson

3 records

Emerson

Active

Helianthus annuus L. · Sunflower

Tovarystvo z obmezhenoiu vidpovidalnistiu «TK ART-AHRO»

2 records

Emblem

Terminated

Brassica napus var. napus · Rapeseed

Zhan - Pierre Diufork

1 record

Dynamit

Withdrawn

Brassica napus var. napus · Rapeseed

Deutsche Saatveredelung AG - DSV (DE)

1 record

Detroit polipshenyi

Active

Beta vulgaris Garden Beet Group · Garden beet

Buret Fhilippe

1 record

DK Exstrorm

Terminated

Brassica napus L. · Rapeseed

MONSANTO TECHNOLOGY

1 record

DK Expedition

Withdrawn

Brassica napus L. · Rapeseed

MONSANTO TECHNOLOGY

1 record

De Chantenay

Terminated

Daucus carota L. · Carrot

Domaine Public (FR)

1 record

Dalver

Active

Helianthus annuus L. · Sunflower

Tovarystvo z obmezhenoiu vidpovidalnistiu «TK ART-AHRO»

2 records

DK Importer CL

Active

Brassica napus L. · Rapeseed

Monsanto SAS Boissay Toury FR

1 record

DK Imperial

Withdrawn

Brassica napus L. · Rapeseed

MONSANTO TECHNOLOGY

1 record

CWH 111

Withdrawn

Brassica napus L. · Rapeseed

Nelly Guguin, Jean-Pierre Despeghel,

2 records

DARMOR NAIN

Terminated

Brassica napus var. napus · Rapeseed

Serasem (FR)/Institut National de la Recherche Agronomique (FR)

1 record

CWH 113

Withdrawn

Brassica napus L. · Rapeseed

Jean-Pierre Despeghel, Nelly Guguin,

2 records

Dahlas

Active

Helianthus annuus L. · Sunflower

Malinovskyi Serhii Volodymyrovych

2 records

Chester

Active

Helianthus annuus L. · Sunflower

Kyrychenko Maryna Serhiivna, Babych Viktoriia Olehivna, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych,

2 records

CARIBE

Terminated

Solanum tuberosum L. · Potato

AGRIC.CANADA

1 record

BNJ2107

Withdrawn

Brassica napus L. · Rapeseed

RAGT 2N S.A.S

1 record

Barakuda

Withdrawn

Brassica napus var. napus · Rapeseed

Hodowla Roslin Smolice Sp.z o.o Grupa IHAR

2 records

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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.