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21
Oct
2014
Soybean rust detected in Arkansas but too late to affect 2014 crop
Author: Travis Faske, Extension Plant Pathologist

Soybean rust was confirmed earlier this week in three Arkansas counties: Ashley, Chicot and Drew (Fig. 1). Amanda Greer, program associate in extension plant pathology, identified one field in Ashley and Chicot counties with SBR. Soybeans in these fields were near R8 growth stage. Moreover, SBR was confirmed on kudzu in Drew County. Disease incidence was very low (<0.5%) for all positive sites with a couple pustules actively producing spores. Although SBR spores in the Mid-South can be windblown to other soybean fields, the majority of soybean crop is near R7 growth stage, which is well past the stage of growth to be affected by SBR.   Growers should be aware that SBR once again has been detected in the state, but there is no recommendation for control of SBR.

Figure 1. Counties in red indicate at least one positive sample of SBR.

Figure 1. Counties in red indicate at least one positive sample of SBR.


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