What's wrong with my plant? Give us your feedback

Sweet corn > Whole plant > Plant fallen over

1 of 2
  • Image: Diamondback Moth 1
    Credit: E. Burkness, University of Minnesota
  • Image: Diamondback Moth 2

    Credit: Frank Peairs, Colorado State University, Bugwood.org

  • Image: Diamondback Moth 3

    Credit: W. D. Hutchison, University of Minnesota

  • - CLICK PHOTOS TO ENLARGE -

green arrowEuropean Corn Borer
Ostrinia nubilalis

  • Kernels partly or completely chewed; brown droppings (excrement) is usually present
  • Stalks can fall over ("lodge")
  • Small holes should be evident on stalks, sometimes with brown frass coming out of the holes
  • Leaves have small holes, or "shot-holes"
  • Larvae are light brown or pinkish gray in color with round dark spots on each body segment. Mature larvae are about 1 inch long
  • More information on European Corn Borer...
2 of 2
  • Image: Powdery Mildew 1
    Credit: E. Burkness, University of Minnesota
  • Image: Powdery Mildew 2

    Credit: E. Burkness, University of Minnesota

  • Image: Powdery Mildew 3

    Credit: E. Burkness, University of Minnesota

  • - CLICK PHOTOS TO ENLARGE -

green arrowNorthern and Western Corn Rootworm
Diabrotica barberi and Diabrotica virgifera virgifera

  • Adult corn rootworm beetles feed on corn silk which can reduce the number of kernels on the cob
  • In severe cases, very few kernels will be produced on the cob
  • Larvae feed on roots of corn, which can cause plant to fall over, or "lodge"
  • Northern corn rootworm adults are about 3/16th inch long and pale green; western corn rootworm adults are about 5/16 inch long, yellow to green in color with three black stripes running along the back of the beetle
  • More information on Northern and Western Corn Rootworm...

Don't see what you're looking for?