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Barley yellow rust in North America
W M Brown1, J P Hill, V R Velasco
1Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, Colorado 80523-1177, USA. wbrown@lamar.colostate.edu
Annual Review of Phytopathology
|November 10, 2001
Summary
Barley yellow rust, caused by Puccinia striiformis f. sp. hordei, is an invasive pathogen spreading across North America. Integrated management strategies, including resistant cultivars and chemical controls, are crucial for sustainable barley production.
Area of Science:
- Plant Pathology
- Agricultural Science
Background:
- Barley yellow rust (Puccinia striiformis f. sp. hordei) is an invasive fungal disease impacting barley production.
- The pathogen was introduced to South America in 1975 and subsequently spread to North America, first detected in Mexico in 1988 and Texas in 1991.
Purpose of the Study:
- To document the invasive spread of barley yellow rust in North America.
- To highlight the genetic heterogeneity of the pathogen population.
- To discuss management strategies for sustainable control.
Main Methods:
- Disease surveillance and reporting of pathogen spread.
- Identification and evaluation of genetic resistance in barley.
- Assessment of cultural and chemical control efficacy.
Main Results:
- Barley yellow rust has established in major barley-producing regions of the American West.
- The North American population of Puccinia striiformis f. sp. hordei is genetically diverse.
- Effective cultural, chemical, and genetic resistance strategies are available.
Conclusions:
- Sustainable management of barley yellow rust requires an integrated approach.
- Utilizing general field resistance and other control tactics is recommended for long-term disease management.