What causes flag smut of wheat?

2017 ◽  
Vol 66 (7) ◽  
pp. 1139-1148 ◽  
Author(s):  
K. G. Savchenko ◽  
L. M. Carris ◽  
J. Demers ◽  
D. S. Manamgoda ◽  
L. A. Castlebury
Keyword(s):  
Flag Smut

Difenoconazole: A new seed dressing molecule for effective management of flag smut (Urocystis agropyri) of wheat

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Sudheer Kumar ◽  
Prem Lal Kashyap ◽  
Ishwar Singh ◽  
Poonam Jasrotia ◽  
Devendra Pal Singh ◽  
...  
Keyword(s):  
Effective Management ◽  
Flag Smut ◽  
Seed Dressing

Mapping of flag smut resistance in common wheat

2013 ◽  
Vol 32 (3) ◽  
pp. 699-707 ◽  
Author(s):  
Arvinder Toor ◽  
Urmil Bansal ◽  
Harbans Bariana
Keyword(s):  
Common Wheat ◽  
Flag Smut

Urocystis agropyri (flag smut of wheat).

2021 ◽  
Author(s):  
Keyword(s):  
Triticum Aestivum ◽  
North America ◽  
Host Range ◽  
Wheat Straw ◽  
Crop Plants ◽  
Widespread Species ◽  
Flag Smut ◽  
Worldwide Distribution ◽  
The Family ◽  
Systemic Infections

Abstract U. agropyri causes flag smut on leaves of species in the family Poaceae. As a pathogen of grasses, it appears to have a wide host range (Mordue and Waller, 1981) and a worldwide distribution (UK CAB International, 1991). However, some authorities do not include the pathogen on wheat [Triticum aestivum], identified as Urocystis tritici, within U. agropyri. Rossman et al. (2006) place U. agropyri in the category of a "Threat to Major Crop Plants" and wheat and wheat straw imports are restricted in North America (Anon., 2005; CFIA, 2008). If the widespread species includes the wheat pathogen, then it is already present on all continents with agriculture and in major wheat-growing areas (Purdy, 1965), so it has already been introduced and may be difficult to exclude from additional areas. Both smuts are seed- and soil-borne, causing systemic infections that can be perennial in weeds and graminaceous crops, including turfgrasses. The spore balls are windborne (Purdy, 1965) and prevention of spread among wild grasses on land is not amenable to control.

scholarly journals Molecular Diagnostic Assay for Rapid Detection of Flag Smut Fungus (Urocystis agropyri) in Wheat Plants and Field Soil

2020 ◽  
Vol 11 ◽  
Author(s):  
Prem Lal Kashyap ◽  
Sudheer Kumar ◽  
Ravi Shekhar Kumar ◽  
Anju Sharma ◽  
Poonam Jasrotia ◽  
...  
Keyword(s):  
Rapid Detection ◽  
Smut Fungus ◽  
Molecular Diagnostic ◽  
Diagnostic Assay ◽  
Field Soil ◽  
Flag Smut ◽  
Molecular Diagnostic Assay

Influence of irrigation on survival of Poa pratensis infected by Ustilago striiformis and Urocystis agropyri

1977 ◽  
Vol 55 (2) ◽  
pp. 216-218 ◽  
Author(s):  
Clinton F. Hodges
Keyword(s):  
Poa Pratensis ◽  
Growing Season ◽  
Flag Smut ◽  
Shoot Production

Irrigation increased the number of surviving plants of Poa pratensis 'Merion' infected with Ustilago striiformis (stripe smut) and Urocystis agropyri (flag smut) and stimulated the production of healthy shoots from infected plants. These effects were more pronounced with plants infected by U. striiformis. Nonirrigated plants infected by U. agropyri had died by the end of the second growing season: irrigation increased the survival of some U. agropyri infected plants to a third growing season and increased the survival of many U. striiformis infected plants for the same period. The number of healthy plants established from irrigated plants infected by U. striiformis also was much greater than those established from plants infected by U. agropyri. The pattern of development for healthy shoot production from infected plants differed for the respective pathogens. The reaction of U. striiformis and U. agropyri to irrigation suggests that U. agropyri is the more destructive of the two pathogens. The production of healthy shoots from infected plants may provide a means for evaluation of P. pratensis for resistance to U. striiformis.

Grass host for wheat flag smut.

1973 ◽  
Vol 2 (4) ◽  
pp. 28 ◽  
Author(s):  
RG Rees ◽  
GJ Platz
Keyword(s):  
Flag Smut

Urocystis agropyri. [Descriptions of Fungi and Bacteria].

1981 ◽  
Author(s):  
J. E. M. Mordue
Keyword(s):  
South Africa ◽  
New Zealand ◽  
North America ◽  
Geographical Distribution ◽  
Flag Smut ◽  
Soil Inoculum ◽  
Seed Head

Abstract A description is provided for Urocystis agropyri. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Aegilops, Andropogon, Agropyron, Agrostis, Arrhenatherum, Bromus, Dactylis, Deschampsia, Elymus, Elytrigia, Festuca, Hierochloe, Hordeum, Koeleria, Lolium, Phleum, Poa, Triticum. DISEASE: Causes flag smut of wheat, barley and grasses, characterized by linear black erumpent sori between veins on leaves and sheaths. The disease causes stunting, excessive tillering, twisting and shredding of leaves and may prevent emergence of the seed head. Sori may also occur on glumes and have been observed on rhizomes (47, 2184). Symptoms are similar to those caused by Ustilago striiformis on grasses. GEOGRAPHICAL DISTRIBUTION: Europe, Asia, North America, Chile, South Africa, Australia, New Zealand, China (CMI Map 80, ed. 4, 1973). TRANSMISSION: By spore balls which contaminate both seed and soil. Inoculum can remain viable on seed for 4 years and in soil for up to 3 years. Teliospores germinate to produce sporidia which infect young coleoptiles of hosts. Systemic mycelium may overwinter in young seedlings or perennate in crowns, rhizomes, etc.

Flag smut of wheat

1965 ◽  
Vol 31 (4) ◽  
pp. 565-606 ◽  
Author(s):  
Laurence H. Purdy
Keyword(s):  
Flag Smut

scholarly journals Cultural variability among nine isolates of Urocystis agropyri on wheat

1970 ◽  
Vol 33 (3) ◽  
pp. 347-351
Author(s):  
SS Karwasra ◽  
MS Beniwal ◽  
ML Chhabra
Keyword(s):  
Key Words ◽  
Mycelial Growth ◽  
Agar Medium ◽  
Potato Dextrose Agar ◽  
Corn Meal ◽  
Potato Dextrose Agar Medium ◽  
Flag Smut ◽  
Fast Growing ◽  
Different Temperatures ◽  
Slow Growing

Four temperatures and five different media were tested for cultural variability of nine geographical isolates of Urocystis agropyri (Preuss.) Schroet causing flag smut of wheat. Urocystis agropyri is extremely slow growing pathogen and each isolate responded differently at different temperatures. All the isolates/ collections grew well at 20°C after 45, 60, and 70 days after incubation. Ambala isolate was fast growing. PDA medium was found to be most suitable for the growth of all the nine isolates/collections. The average mycelial growth was also maximum on Potato Dextrose Agar Medium followed by Corn Meal Dextrose Agar, Oat Meal Dextrose Agar, Grain Meal Dextrose Agar and minimum on Wheat Meal Dextrose Agar. Key Words: Variability, media, isolates, wheat. doi:10.3329/bjar.v33i3.1593 Bangladesh J. Agril. Res. 33(3) : 347-351, September 2008

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