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21
Sep
2015
Soybean rust spreading in Arkansas
Author: Travis Faske, Extension Plant Pathologist

SBR was detected in a few isolated fields within the counties (see below; counties in red are confirmed to have soybean rust) with the area of highest SBR severity was near Pine Bluff.  SBR was not very active until recently, but as the weather cools more spores will be produced from those fields and spread northward.  So, folks north of I-40 should be on the watch for SBR (scout R7 bean fields and look for small volcano-shaped pustules on the bottom side of the leaves) and send any suspicious samples to the plant disease diagnostic lab in Fayetteville.  The current weather does not favor widespread development of SBR, but there are some late planted beans in the state, which may be affected by SBR.  This may be one of the more active seasons that we have seen in quite some time, weather depending. Soybean rust 9-21

Last year SBR arrived in October and the year before in August so we recognize that it can be a regular occurrence, but foliar diseases are unpredictable and each year is a little different.  There is good information about SBR on the recently updated disease chapter of the soybean handbook, earlier blog articles, and on the UAEX website.  Contact your county agent or me, Travis Faske, if you encounter soybean rust and have questions on how to proceed.


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