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.

Carditello

Active

Hordeum vulgare L. · Barley

GENETIC SERVICES S.R.L.

3 records

Bivouac

Terminated

Hordeum vulgare L. · Barley

LEMAIRE DEFFONTAINES S.A.S.

4 records

Active

Beta vulgaris L. · Beet

3 records

Icarus Smart

Active

Beta vulgaris Sugar Beet Group · Sugar beet

DE UA

2 records

Florian

Terminated

Hordeum vulgare L. · Barley

3 records

Blans

Active

Beta vulgaris Sugar Beet Group · Sugar beet

2 records

Bico

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

2 records

TRON

Terminated

Hordeum vulgare L. · Barley

SEJET PLANTEFORÆDLING

2 records

Pepeta KWS

Withdrawn

Beta vulgaris Sugar Beet Group · Sugar beet

KWS Saat AG, DE

1 record

LP 2-345

Terminated

Hordeum vulgare L. · Barley

D-r Iorh Hrosser

1 record

1 2 3 4 5 6 7 8 Next

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

All terms →

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.