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United States Department of Agriculture

Agricultural Research Service

Research Project: Effective Disease Management Through Enhancement of Resistant Sugarcane

Location: Sugarcane Research Unit

Title: Development of orange rust of sugarcane in Louisiana

Authors
item Grisham, Michael
item Haudenshield, James
item Warnke, Kathryn
item Maggio, Jeri
item Hoy, Jeffrey -
item Waguespack, Herman -
item Jackson, Windell -
item Hartman, Glen

Submitted to: American Society of Sugar Cane Technologists
Publication Type: Abstract Only
Publication Acceptance Date: May 1, 2013
Publication Date: N/A

Technical Abstract: Orange rust of sugarcane was observed for the first time in the Americas in 2007 in Florida. Urediniospores of Puccinia kuehnii, the causal agent of orange rust, were collected in aerial traps located in Louisiana in 2010; however, the first observation of disease symptoms in the state was not made until June 2012 on cultivar HoCP 05-961. The identity of P. kuehnii was verified using the species-specific qPCR assays. Seed cane increase plots of this newly released cultivar were surveyed, and orange rust was detected in 17 of 38 (45%) fields. Initially, disease incidence and severity were low, increasing gradually throughout the growing season, becoming severe in November at two locations. Observations of orange rust in 2012 were limited to HoCP 05-961. Studies have been designed to monitor the development of orange rust in HoCP 05-961 throughout the 2013 growing season, to survey released and experimental cultivars for orange rust infection, and to determine what effect orange rust has on sugarcane yield.

Last Modified: 7/30/2014
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