PPDC Clinic Crop Disease Reports July 20-August 3

PPDC Clinic Crop Disease Reports July 20-August 3

Next week I will be attending the American Phytopathological Society national meetings in San Antonio, Texas. During my absence the Plant and Pest Diagnostic Clinic will be working at partial capacity from August 3 – 10. Plant samples may still be submitted, but turnaround time will be delayed. All samples submitted to the clinic during this time will be stored under refrigerated conditions to maintain quality until I return to the office August 10.  Thanks in advance for your patience.

The following diseases were reported in samples submitted to the UNL Plant and Pest Diagnostic Lab from July 20 to August 3.

Map of Nebraska crop reporting districts
Figure 1. Reporting districts (View larger)


East District – Brown stem rot, Phytophthora root and stem rot

Southeast District – Charcoal rot, stem borer

Southwest District – Bacterial pustule

Central District – Banks grass mite, brown stem rot, frogeye leaf spot

Northeast District – Brown stem rot, frogeye leaf spot


Southwest District – Goss’s Wilt

East District – Common rust, southern rust, gray leaf spot, Goss’s wilt, Northern corn leaf blight, Physoderma brown spot, southern rust, southern corn leaf blight

Southeast District – Banks grass mites, common rust, gray leaf spot, Fusarium crown rot, northern corn leaf blight, northern corn leaf spot, southern rust

South District – Bacterial leaf streak, common rust, gray leaf spot, Physoderma brown spot, southern rust

Central District – Bacterial leaf streak, Holcus spot, gray leaf spot, common rust,

North District – Bacterial leaf streak, southern rust

Northeast District – Southern rust


East District – Downy mildew, drippy stem blight


Find more information and photos about each of these diseases in the Crop Disease Management section of CropWatch for Wheat, Soybean, and Corn.

Visit the Plant and Pest Diagnostic Clinic page in CropWatch for

  • information on how to submit crop and pest samples,
  • sample submission form, and
  • a fee schedule for diagnostic services.

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