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ARS Home » Southeast Area » Canal Point, Florida » Sugarcane Field Station » Research » Publications at this Location » Publication #357158

Research Project: Identification of Resistant Germplasm and Markers Associated with Resistance to Major Diseases of Sugarcane

Location: Sugarcane Field Station

Title: A Decade of Orange Rust in Florida: Where We Were and Where We Are Going

item RAID, RICHARD - University Of Florida
item CHAULAGAIN, BHIM - University Of Florida
item HINCAPIE, MARTHA - University Of Florida
item SANJEL, SANTOSH - University Of Florida
item HARTMAN, D - University Of Florida
item Sood, Sushma
item COMSTOCK, JACK - Retired ARS Employee
item ROTT, PHILIPPE - University Of Florida

Submitted to: American Society of Sugar Cane Technologists
Publication Type: Abstract Only
Publication Acceptance Date: 4/30/2018
Publication Date: 6/1/2018
Citation: Raid, R.N., Chaulagain, B., Hincapie, M., Sanjel, S., Hartman, D., Sood, S.G., Comstock, J.C., Rott, P.C. 2018. A Decade of Orange Rust in Florida: Where We Were and Where We Are Going. American Society of Sugar Cane Technologists. 38:49.

Interpretive Summary: N/A

Technical Abstract: Orange rust caused by Puccinia kuehnii, was first observed in Florida during 2007 on a very important cultivar, CP80-1743. Resistant to brown rust incited by P. melanocephala, this cultivar occupied nearly one third of the Florida acreage and was favored for its high early sucrose. Its phase out began immediately, but its replacements, namely CP88-1762 and CP89-2143 soon succumbed to the disease, presumably due to the presence of rust variants. During the early years of orange rust, growers were forced to rely on newly registered fungicides for control. However, in more recent times, growers have chosen to plant a brown rust susceptible cultivar, CP96-1252, primarily for its high yield and good ratooning ability. With a narrower window of rust susceptibility, the choice to chemically control brown rust rather than orange rust is an economic one. As we move forward with more precise decision tools regarding fungicide applications, the Florida sugarcane breeding programs shows signs of making progress regarding more durable host-plant resistance.