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Soybean Rust Indeed Confirmed in Georgia

Author: y
Creation Date: 05 May 2005
Last Reviewed: 05 May 2005
I mentioned last week that the first identification of Asian soybean rust on soybeans for the 2005 growing seasons was reported in Seminole County, Georgia. At the time the samples had not been reviewed by the USDA-APHIS and further confirmation on this very important observation was to come. Early this week, USDA-APHIS (Mary Palm) confirmed that indeed Asian soybean rust was present and supported the excellent work done by the University of Georgia (Bob Kemerait) in identifying soybean rust in it's very early stages.

The difficulty associated with the proper identification of this disease was illustrated during this verficiation process. In the early stages of disease development, soybean rust can appear or be confused with other soybean diseases.

In addition, the collection of samples for anlaysis is also important. When sending samples to OMAF or the Pest Diagnostic Clinic please remember to confirm that they symptoms that you are seeing in the field are present on the leaf samples sent.

This not only goes for soybean rust but for all samples sent whether it is problems due to diseases, insects, fertility, etc. Nothing beats having a good representative sample.

The following map of Florida and Georgia show the present distribution of Asian soybean rust in the United States (USDA-APHIS). Besides Georgia, another county in Florida (Dade county) was confirmed to have soybean rust present on Kudzu. Spore deposition models would suggest movement of spores into the southern US and depending on whether conditions they could led to infection on other hosts such as Kudzu and possible soybeans as they develop. We will be providing further regular updates on soybean rust in the US and how these observations could impact Ontario and Canada. The maps could be found at the USDA-APHIS supported website at: www.sbrusa.net.


Map of Florida and Georgia showing present distribution of Asian soybean rust in the United States.


 

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