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Derecho Damage, Heat and Drought Threaten Iowa Bumper Corn Crop

  • Crop ratings fall most since 2012 after derecho, heat wave
  • Conditions worsened in 16 of 18 states monitored by USDA
Corn plants are shown pushed over in a storm-damaged field in Tama, Iowa on Aug. 11.
Corn plants are shown pushed over in a storm-damaged field in Tama, Iowa on Aug. 11.Photographer: Daniel Acker/Getty Images
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The corn crop in the U.S. Midwest deteriorated the most in 8 years with hot weather adding to woes from drought and the Aug. 10 derecho windstorm that swept through the top-growing state of Iowa.

Crop ratings of “good” or “excellent” fell by 5 percentage points to 64%, the U.S. Department of Agriculture said Monday. Ratings fell in 16 of the 18 states monitored by the agency.