Pythium root and or crown rot

scouted Aug. 12, 2021

Scientific Name
Pythium sp.
Background
Soybeans in Johnston county, variety Group 65?, were scouted and observed with 30% of the field affected by dieback and wilting in patches in the field. The field was sprayed with fierce preemergence followed by xtend 2 weeks after.
Conclusion
The issue was identified as Pythium root rot and/or Pythium crown rot. This disease is caused by Pythium sp. Pythium root rot and crown rot can result in both pre- and post-emergence damping-off, leading to delayed emergence and stunting of infected seedlings. Prevalence tends to increase in warm and moist, but not saturated soils. This pathogen is an oomycete.
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