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This morning it was confirmed that Asian soybean rust (ASR) was found on Group V soybeans in Rapides Parish. The find was on leaves taken from the sentinel plot at the Dean Lee Station. Several sporulating pustules were found on 75% of the leaves taken from that plot. This is the first confirmation of ASR on soybeans in Louisiana during the 2006 season.
The recommendation is for soybeans in the R1 through R5 growth stages and have a good yield potential be treated with a rust fungicide. The fungicides for rust control have a triazole alone or in combination with a strobilurin. These products are listed in the 2006 Plant Disease Management Guide and are on the LSU AgCenter Rust website, http://www.lsuagcenter.com/soybeanrust/.
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