Photo 2. Golden brown pustules of American corn rust, Puccinia polysora, on the underside of a maize leaf.
American corn rust, maize rust, southern rust
Puccinia polysora. Another rust, Puccinia sorghi (common rust of maize) occurs worldwide (see Fact Sheet no. 225). Often the two rusts occur together, requiring microscopic examination to tell them apart.
AUTHORS Helen Tsatsia & Grahame Jackson
Information from CABI (2013) Puccinia polysora (American corn rust) Crop Protection Compendium (http://www.cabi.org.cpc/); and from Smith D (2016) Southern rust is a rare but serious threat to Wisconsin corn crops. UW-Extension. (http://wiscontext.org/southern-rust-rare-serious-threat-wisconsin-corn-crops). Photo 3 McKenzie E (2014) Puccinia polysora. PaDIL - (http://www.padil.gov.au).
Produced with support from the Australian Centre for International Agricultural Research under project PC/2010/090: Strengthening integrated crop management research in the Pacific Islands in support of sustainable intensification of high-value crop production, implemented by the University of Queensland and the Secretariat of the Pacific Community.
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