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More soybean rust found on kudzu in Brooks County, GA
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7/17/2006 3:30 p.m. CDT -- Georgia officials said soybean rust was found today on a sample collected from kudzu in Brooks County, southeast of Quitman, Ga. Rust was first found on kudzu in the county on June 29, 2006.
In both the Georgia state commentary and a more detailed e-mail, officials said the find today in south-central Georgia on the Florida border was collected from a shaded area under pine trees.
The sample was "brought in, examined and confirmed with a dissection microscope. Six leaves were examined, and all six leaves were infected with sporulating soybean rust pustules.
"It appears that the infection is not spreading quickly within that site, perhaps due to dry weather conditions," the commentary said. "Soybean rust had already been confirmed in the same county on kudzu at a different location, so this find today is not a surprise. The weather forecast this week calls for 90s and scattered/isolated thunderstorms.
"Most of our soybean sentinel plots (MG-IV and MG-VI) are now at the R5 to R6 growth stage as of 7/17/06. Commercial soybeans in our state range from about R1 to R4."
Growers in SW and S-central GA need to protect crop at bloom
The report said that growers in Georgia should continue to follow spray application recommendations as given by University of Georgia plant pathologist Bob Kemerait:
"The find of soybean rust in our sentinel plots in Attapulgus from a sample collected on 3 July (and Brooks County today - July 17) further confirms the need for growers in the SW (and south central) portion of Georgia to protect their crop as it enters bloom stages using effective fungicides. The key to successfully controlling rust, in our opinion, requires early treatment with an effective fungicide.
"If you suspect that rust may already be in your field, we would encourage you to use a fungicide that has curative properties. If rust has likely not infected your crop, use of labeled protectant or curative fungicides should suffice.
"Growers outside of this region of Georgia should follow sentinel-plot reports carefully from the Cooperative Extension and be prepared to spray once the crop enters bloom stage and rust is likely to move to your area."
Source: Georgia commentary on www.sbrusa.net and U of GA e-mail to soybean specialists.
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