Diseases

Rust

Pucciniales

Rust is a group of dangerous fungal diseases manifesting as pustules on plant organs. The disease significantly reduces yield by disrupting photosynthesis and increasing transpiration.

Mentioned in descriptions 14 859 varieties reference book.

Rust is a collective name for a group of fungal diseases whose pathogens belong to the order Pucciniales. Outwardly, the disease manifests as the formation of pustules on leaves, stems, and other parts of plants—cushions of orange, brown, or black color containing pathogen spores.

Active development of the disease depends on weather conditions, primarily high humidity in the form of dew, fog, or precipitation, and specific temperature ranges unique to each rust species. Additional risk factors include crop density, the presence of plant residues, and the proximity of alternate hosts necessary for the development of certain fungal species.

The evaluation of cultivar resistance in variety trials is carried out under natural or artificial infectious backgrounds during the milk stage by recording the percentage of infection on the flag leaf surface. Based on the data obtained, accessions are classified as immune, resistant, or susceptible, and molecular analysis methods are used to identify resistance genes, such as Lr34.

Sources10

Breakdown by crop

Rust of common wheat 1 722 Barley rust 466 Rust on perennial ryegrass 377 Sunflower rust 362 Triticale rust 294 Rust of Durum Wheat 268 Oat crown rust 182 Rust of sweet corn 157 Rust of rye 116 Bean rust 114 Rose Rust 114 Rust of Kentucky Bluegrass 110 Rust of Italian ryegrass 109 Apple Rust 106 Rust of tall fescue 104 Maize rust 77 Pear Rust 70 Rust of Italian Ryegrass 70 White Rust of Chrysanthemum 59 Rust of sugar beet 59 Rust on Black Currant 52 Leek Rust 52 Rust of Faba Bean 39 Rust of Faba Bean 38

Found in these crops

Bread wheat 1 739 Barley 468 Perennial ryegrass 378 Sunflower 368 Triticale 295 Durum wheat 269 Oat 183 Sweet corn 158 Rye 116 Common bean 115 Rose 114 Kentucky bluegrass 110

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.

SY Thunderbolt

Active

Hordeum vulgare L. · Barley

Syngenta Crop Protection AG

4 records

Titanium LS

Active

Festuca arundinacea Schreb. · Tall fescue

Rutgers University

3 records

Temptation

Active

Festuca arundinacea Schreb. · Tall fescue

Valley Seeds Pty Ltd

3 records

Ticho

Terminated

Festuca arundinacea Schreb. · Tall fescue

PROF. DR. DIRK REHEUL /DR. IR. MATHIAS COUGNON

4 records

Thimea

Active

Hordeum vulgare L. · Barley

Saatzucht Donau GmbH & Co.KG

4 records

SY Orofino

Active

Triticum aestivum L. · Bread wheat

Syngenta Participations AG

4 records

Thermidor

Active

Triticum aestivum L. · Bread wheat

Unisigma G.I.E., Limagrain Europe S.A.S.

4 records

Thermal Blue

Active

Poa pratensis L. · Kentucky bluegrass

The Scotts Company

4 records

SW Dalguise

Active

Avena sativa L. · Oat

SW Semundo Limited (GB)

4 records

SY Dinasti

Terminated

Helianthus annuus L. · Sunflower

SYNGENTA FRANCE S.A.S.

4 records

SV3274ZL

Active

Allium porrum L. · Leek

VEGETABLE MONSANTO B.V.

3 records

SW Gnejs

Terminated

Triticum aestivum L. · Bread wheat

Jönsson Jan Ö

5 records

SY Admiration

Active

Triticum aestivum L. · Bread wheat

Syngenta Participations AG| CH

4 records

SW Vals

Terminated

Triticum aestivum L. · Bread wheat

Jönsson Jan Ö

4 records

Sureton

Active

Allium porrum L. · Leek

NUNHEMS

7 records

Sven

Active

Salix L. · Willow

Stig Larsson

3 records

Sytan

Active

Daucus carota L. · Carrot

Clause Semences SA (FR)

3 records

SY Dubaj

Active

Triticum aestivum L. · Bread wheat

Syngenta Participations AG

4 records

Suleva DS

Active

Triticum aestivum L. · Bread wheat

Lietuvos agrarinių ir miškų mokslų centras

4 records

SY Heroo

Active

Hordeum vulgare L. · Barley

Syngenta Crop Protection AG

4 records

Sydney

Active

Phaseolus vulgaris L. · Common bean

Pop Vriend Research B.V.

4 records

Stefanus

Protection expired

Triticum aestivum L. · Bread wheat

SAATZUCHT DONAU GES.M.B.H. & COKG

3 records

SV3225ZL

Active

Allium porrum L. · Leek

VEGETABLE MONSANTO B.V.

3 records

Starlet

Active

Festuca arundinacea Schreb. · Tall fescue

DLF-TRIFOLIUM DANSK PLANTEFORAEDLING

4 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
Verticillium wilt 12 175
Scab 12 064
Grey mold 7 316

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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.