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Diseases

Rhynchosporium

Rhynchosporium

Rhynchosporium is a dangerous fungal disease of barley and rye, manifesting as leaf blotches and leading to premature drying and significant yield losses.

Mentioned in descriptions 1 358 varieties reference book.

Rhynchosporium manifests as the formation of oval or irregular gray, gray-green, or dull green blotches on leaves, leaf sheaths, and occasionally stems and spikes. In barley, the blotches often have a dark brown margin, whereas in rye it may be absent; sporulation may develop on the underside of the leaf, and in cases of severe infection, the leaves dry out.

The development of the pathogen depends on weather conditions, favoring a humid temperate climate with temperatures from +15°C to +20°C and relative humidity above 80%. Risk factors include late sowing dates, high seeding density, weed abundance, excess nitrogen, and the presence of infected crop residues.

Resistance of varieties is often quantitative and determined by a set of loci, however, due to the high variability of the fungus, the resistance status may be lost. The evaluation of varieties is conducted during multi-year field trials using scoring scales or laboratory methods of leaf segment inoculation with the calculation of a resistance index.

Sources10

Breakdown by crop

Barley Scald 393 Rhynchosporium Scald of Triticale 65 Rhynchosporium Scald of Rye 41 Rhynchosporium leaf scald — hybrid ryegrass 5

Found in these crops

Barley 220 Triticale 52 Rye 39 Hybrid ryegrass 5 Italian ryegrass 2 Cocksfoot 2 Italian ryegrass 1 Bread wheat 1 Soybean 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.

Requin

Active

x Triticosecale Wittm. ex A. Camus · Triticale

Institut national de recherche pour l'agriculture, l'aliment (FR)/Agri Obtentions SA (FR)

AT DE FR
6 records

Reflektor

Active

Secale cereale L. · Rye

PHP PETERSEN

FI PL UA
7 records

NOS Lollipop

Active

Hordeum vulgare L. · Barley

Nordic Seed A/S

CZ DK PL
6 records

Imidis

Terminated

Hordeum vulgare L. · Barley

Sejet Planteforaedling I,S

DK LT NL
6 records

Buzzer

Active

Hordeum vulgare L. · Barley

SECOBRA RECHERCHES S.A.S

FR SK UA
7 records

Bonjour

Active

x Triticosecale Wittm. ex A. Camus · Triticale

LEMAIRE DEFFONTAINES S.A.S.

DE FR IT
7 records

Volume

Terminated

Hordeum vulgare L. · Barley

Syngenta UK Ltd

DK NL
8 records

SY Canyon

Active

Hordeum vulgare L. · Barley

Syngenta Crop Protection AG

DK IE
7 records

SY Phantoom

Active

Hordeum vulgare L. · Barley

Syngenta Participations AG| CH

FR HR
6 records

SY Barnabus

Active

Hordeum vulgare L. · Barley

Syngenta Crop Protection AG

DK PL
6 records

Reptil

Active

x Triticosecale Wittm. ex A. Camus · Triticale

Institut national de recherche pour l'agriculture, l'aliment (FR)/Agri Obtentions SA (FR)

CZ FR
7 records

Meseta

Active

Hordeum vulgare L. · Barley

FLORIMOND DESPREZ VEUVE ET FILS

ES IT
6 records

Mezmaar

Application submitted

Hordeum vulgare L. · Barley

Syngenta UK Ltd

DE FR
9 records

Miranos

Active

Secale cereale L. · Rye

Nordic Seed Germany

DK UA
7 records

LG Caravelle

Active

Hordeum vulgare L. · Barley

Limagrain Europe S.A.S

DK FR
8 records

KWS Curtis

Active

Hordeum vulgare L. · Barley

KWS Lochow

DK FI
9 records

KWS Jaguar

Active

Hordeum vulgare L. · Barley

KWS MOMONT RECHERCHE SARL, FR

FR IT
7 records

Hurler

Active

Hordeum vulgare L. · Barley

SECOBRA RECHERCHES S.A.S

DK IE
8 records

Graphic

Active

Hordeum vulgare L. · Barley

RAGT SEEDS LTD

DK ES
8 records

Glasgow

Active

Triticum aestivum L. · Bread wheat

SAATEN UNION RECHERCHE

FR PL
8 records

Hickory

Active

Hordeum vulgare L. · Barley

SARL ADRIEN MOMONT ET FILS, FR

DE FR
7 records

Fangio

Active

Hordeum vulgare L. · Barley

SECOBRA RECHERCHES S.A.S

CZ FR
7 records

Dalita

Terminated

Lolium x hybridum Hausskn. · Hybrid ryegrass

L. DÆHNFELDT A/S

DK FR
6 records

Christopher

Terminated

Hordeum vulgare L. · Barley

Sejet Planteforaedling I,S

DK LT
6 records

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