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POSTERS: New and emerging diseases

Identification, prevalence and host specificity of edamame pod diseases in Virginia.
Steven Rideout - Virginia Tech - Eastern Shore AREC. Thomas Kuhar- Virginia Tech, Bo Zhang- Virginia Tech, Jill Pollok- Virginia Tech - Eastern Shore AREC, Kemper Sutton- Virginia Tech

Demand in the United States for edamame Glycine max (L.) Merr. has increased over the past two decades and is the second largest soyfood consumed in the US (25,000-30,000 tons annually). While domestic edamame production is on the increase, at least 70% of edamame consumed in the US is imported from China and Taiwan. A research trial in 2018 wasperformed at Virginia Tech’s Eastern Shore Agricultural Research and Extension Center in Painter to evaluate new edamame breeding lines for the purpose of potentially increasing edamame production in the US. The objective of this preliminary study was to evaluate common diseases found on edamame in Virginia and assess potential differences in cultivar susceptibility. Despite minor levels of foliar diseases, significant pod disease was noted in certain cultivars. Incidence of damaged pods ranged from 7% to 62% across the 24 entries in this trial. Fungi were isolated from pods showing circular, discolored, and sometimes sunken lesions. No bacteria were recovered. Fungi were morphologically and molecularly identified, using the ITS4/5 primer set and sequencing the DNA. Colletotrichum truncatum, a number of Fusarium spp., Phomopsis spp., and Cercospora kikuchii were recovered. This trial will be repeated in 2019 with preliminary results being presented.