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Diseases

Ramularia leaf spot

Ramularia collo-cygni

Ramularia leaf spot is a fungal disease of barley that manifests as rectangular reddish-brown spots with a chlorotic halo. The disease is characterized by high harmfulness and often occurs in a latent form, complicating visual diagnosis.

Mentioned in descriptions 432 varieties reference book.

Ramularia leaf spot appears as pinpoint necroses and rectangular lesions about 2×0.5 mm in size, which are restricted by leaf veins and are clearly visible on both sides of the leaf blade. The spots have a reddish-brown color with a characteristic yellow chlorotic halo, and sporulation in the form of black dots can develop on the dead tissues.

The development of the pathogen is most intense at temperatures from +15°C to +20°C and high air humidity exceeding 85–95%. The disease usually becomes noticeable in the second half of the growing season, starting from the heading or flowering stage, although primary signs may appear significantly earlier.

The evaluation of variety resistance is carried out using phytopathological monitoring methods with visual assessment of the degree of leaf surface infection. Given the ability of the pathogen to develop as an endophyte and the complexity of diagnosis, PCR methods are used for accurate pathogen identification during variety trials.

Sources10

Breakdown by crop

Ramularia leaf spot of barley 83 Ramularia leaf spot of sugar beet 40 Ramularia leaf spot of fodder beet 3

Found in these crops

Barley 127 Sugar beet 41 Beet 3 Mangelwurzel 3 Garden strawberry 1

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.

LG Caruzo

Withdrawn

Hordeum vulgare L. · Barley

Limagrain Europe, FR

FR
1 record

KM13CO24

Active

Hordeum vulgare L. · Barley

KWS Momont Recherche Sarl

IT
1 record

Goliat

Active

Beta vulgaris Fodder Beet Group · Mangelwurzel

Malopolska Hodowla Roslin Spolka z o.o.

PL
3 records

Baccara/Bakara

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

Khart Rodzher Evelin

UA
1 record

BACCARA (H46123)

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

VANDERHAVE SUGAR BEET B.V

ES
1 record

Yulicia KWS

Withdrawn

Beta vulgaris Sugar Beet Group · Sugar beet

DE
1 record