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.

Illico

Withdrawn

Lolium multiflorum Lam. var. westerwoldicum Wittm. · Westerwolds Ryegrass

Carneau Freres SA Eurogazon (FR)

CZ FR

2 records

Ennsio

Terminated

Triticum aestivum L. · Bread wheat

Landwirtschaftliche Fachschule Edelhof Saatzucht

3 records

FDN18WW0240

Active

Triticum aestivum L. · Bread wheat

FLORIMOND DESPREZ VEUVE ET FILS

ES IT

2 records

Fortuna

Active

Festuca arundinacea Schreb. · Tall fescue

PGG Wrightson Seeds South America

FR IT

2 records

Chrismar

Protection expired

Triticum aestivum L. · Bread wheat

INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR

ES FR

4 records

Cusmi

Withdrawn

Lolium multiflorum Lam. ssp. italicum (A. Br.) Volkart · Italian ryegrass

Semences De France (FR)

CZ FR

2 records

Catalus

Terminated

Triticum aestivum L. · Bread wheat

Erhard Eher

3 records

Astor

Terminated

Dianthus caryophyllus L. · Carnation

RICARDO BREA E HIJOS

ES NL

2 records

Beaupré

Active

Populus L. · Poplar

AMINAL-INSTITUUT BOSBOUW EN WILDBEHEER E.V.

BE HU

2 records

Baha

Active

Zea mays L. subsp. mays (Sweet Corn Group) · Sweet corn

MAY AGRO, TOHUMCULUK SANAYI VE TICARET A.S., TR

2 records

Agathe

Terminated

Triticum durum Desf. · Durum wheat

INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR

ES FR

4 records

Barfest

Terminated

x Festulolium Aschers. et Graebn. · Festulolium

Matt Herb

DE FR

2 records

Aquilon

Protection expired

Triticum aestivum L. · Bread wheat

RAGT

ES FR

3 records

Alambra

Terminated

Protection expired

Avena sativa L. · Oat

Adrien Momont et Fils SCA (FR)

3 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.