Soybean Green Stem Syndrome
scouted Oct. 22, 2021
- Scientific Name
- Soybean Green Stem Syndrome
- Background
- Soybeans in Hyde county, variety DynaGro S62XT09, were scouted and observed 100% of the field was affected widespread by leaf spot, speckling, and stippling. This is in a test plot. Plants don't seem to be senescing like they should. The leaves are turning black and seed quality is poor. There seems to be some orange pustules on the underside of the leaves.
- Conclusion
- This issue was identified as Green soybean syndrome. There is no clear cause of this disease. Soybean green stem syndrome causes abnormal senescence where the stem remains green. The green stem could be caused by excessive moisture. High fall temperatures and drought may lead to faster grain drydown than stem drydown. Carbohydrates remain in the stem because of limitations in pod load in plants with a high pod load potential. Insect damage from stink bugs and kudzu bug can result in stem stress leading to green stem. Susceptibility in individual varieties is difficult to obtain due to the nature of the phenomenon. Green stem can likely occur with in any variety if the environmental stressors are present during pod and seed development. Some harvest can still occur with green stem. Waiting until stem maturation or frost to harvest may decrease the seed quality and increase shattering issues.
- Resources
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- No resources have been added.
