14-2019 Determination of organisms affecting soybean seed quality and fungicide efficacy in reducing associated losses

Soybean growers in the mid-southern U.S. have suffered economic losses from reduced quality of harvested soybean seed.  Phomopsis/ Diaporthe complex are one of the most important seed borne diseases affecting the quality of seed.  Symptoms of this disease include shriveled, elongated seed which appear chalky and have reduce seed germination and emergence.  Seed will also have reduced oil content and viability which will incur potential docking at the grain elevator.  Seed infection is more severe when harvest is delayed and environmental conditions continue to be warm and humid during late season and harvest.