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Urocystis agropyri (flag smut )
Urocystis agropyri
flag smut
Polycystis agropyri (Preuss), Tuburcinia agropyri-campestris, Tuburcinia occulta var. agropyri, Tuburcinia tritici, Turbucinia agropyri, Uredo agropyri, Urocystis occulta, Urocystis agropyri-campestris,Urocystis preussii, Urocystis tritici
Worldwide
Widespread
2023-08-21
fungus
Brazil
Wide grass host range. Only economically important in wheat.
UROCAG
Usually only associated with seed lots as lose teliospores. A quarantine pest of wheat in the USA.
1 Known Hosts
Triticum aestivum
wheat
Yes
UROCAG-1, UROCAG-4
Teliospores usually contaminate seed lots. Not commonly internally seed borne, but spores may also found on the seed coat. Quarantine regulations in many countries are being lifted with resistant varieties, seed treatments and cultural control.
Yes
Visual examination
Physical purity testing using ASOA or ISTA rules should determine if seed lots are contaminated.
AOSA or ISTA Physical Purity
UROCAG-3, AOSA/SCST, ISTA
Yes, Thiram thiophanate methyl or a combination of tetramethy,l thiuram disulphide and carboxin (Shekhawat et al., 2011) most recent findings. Other seed treatments found were obsolete
Flag smut of wheat has ceased to be a problem in the regions where seed treatment with systemics and crop rotationis routine practice for its control.
UROCAG-1, UROCAG-4
UROCAG-1
Urocystis agropyri In: Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
UROCAG-4
Wiese MV. 1977. Compendium of Wheat Diseases. APS Press, St. Paul MN. pp106
UROCAG-3
Mathur SB, Kongsdal O, 2003. Common laboratory seed health testing methods for detecting fungi. International Seed Testing Association, Bassendorf, Switzerland: 425 pp.
AOSA/SCST
AOSA Rules for Seed Testing; www.analyzeseeds.com
ISTA
International Rules for Seed Testing. International Seed Testing Association; www.seedtest.org
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