Phytophthora Root Rot Alert

posted by Doug Goodman on Tuesday, August 30, 2016

Phytophthora Root Rot AlertThis past Friday, Dave Denby took phytophthora root rot notes near Bloomington, Illinois. This is a highly unusual occurrence and could repeat itself across the Midwest due to heavy rainfall, saturated soils, and elevated soil temperatures. Currently, the National Weather Service is indicating high winds, scattered hail and substantial flash flooding across a huge section of the Corn Belt.

Key Factors:

  • Saturated soils (Especially in low lying areas where water accumulates).
  • Elevated soil temperatures (Phytophthora can hit at any soil temperature, and becomes most damaging as temperatures rise).
  • The absence of a Gene for specific race resistance.
  • Phytophthora tolerance is not directly linked to the presence of a specific gene. Varieties with average, or weak, phytophthora root rot tolerance are at risk.
  • Ultimately, soybean plants without adequate phytophthora root rot protection will eventually wilt and die, having a direct impact on final yield.

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