Purdue: Soybean Rust Confirmed in Indiana

October 7, 2009 at 11:37 am

From: Purdue Plant & Pest Diagnostic Lab (http://www.ppdl.purdue.edu/PPDL/soybean_rust.html)

Soybean rust was confirmed in Indiana September 30th on soybean leaves collected in southeast Posey county.  Posey County is in the extreme southern and western part of Indiana. The soybean field where rust was found was at R7 and rust was detected at very low levels. Pustules were observed on 14 out of 100 leaves. Severity was low, with 1-2 pustules on each infected leaf.

In 2009, soybean rust has been found in 14 states and 293 counties in the United States, and in two states and five municipalities in Mexico.

Soybean rust was found in 392 counties in the United States in 2008. This is the highest number of counties reporting the disease since it was first discovered in the continental U.S. in 2004.

Unfortunately, there are additional hosts that can serve as overwintering reservoirs for the pathogen and allow for build-up of inoculum, in those environs free from freezing temperatures. The pathogen is well adapted for long-distance dispersal, because spores can be readily carried long distances by the wind to new, rust-free regions.

Although impossible to find symptoms this late in the year in Ohio (thanks to the October 1 killing freeze) the latest soybean rust information can always be found at corn.osu.edu

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Entry filed under: crop disease, soybeans. Tags: , , , .

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This blog is no longer being maintained. Information on this blog may still be relevant, but for the latest agronomic information and farm management information please visit http://corn.osu.edu and http://ohioagmanager.osu.edu, respectively.

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