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Snap bean > Whole plant > Stunted plant

1 of 3
  • Viruses 1

    Credit: Michelle Grabowski, University of Minnesota

  • Viruses 2

    Credit: Michelle Grabowski, University of Minnesota

  • Viruses 3

    Credit: Michelle Grabowski, University of Minnesota

  • - CLICK PHOTOS TO ENLARGE -

green arrowViruses
Bean Common Mosaic Virus, Bean Yellow Mosaic Virus and others

  • Plants are stunted
  • Leaves are curled, mottled, and may be yellow
  • Pods can be distorted, blotchy with dark and light green, and in severe cases, have bronze blotchy areas
  • More information on Viruses ...
2 of 3
  • Potato Leafhopper 1

    Credit: Eric Burkness, University of Minnesota

  • Potato Leafhopper 2

    Credit: Eric Burkness, University of Minnesota

  • Potato Leafhopper 3

    Credit: Eric Burkness, University of Minnesota

  • - CLICK PHOTOS TO ENLARGE -

green arrowPotato Leafhopper
Empoasca fabae

  • Plant may be stunted
  • Young plants develop tan necrotic (sunken) spots on leaves
  • Leaves appear wrinkled and have a yellow tinge
  • PLH adults are lime green, slender, small (1/8 inch long), and wedge-shaped
  • Leafhoppers are present from June-August
  • More information on Potato Leafhopper...
3 of 3
  • Aphid 1

    Credit: Eric Burkness, University of Minnesota

  • - CLICK PHOTOS TO ENLARGE -

green arrowPotato Aphid, Green Peach Aphid, Bean Aphid, and Soybean Aphid
Macrosiphum euphorbiae and Myzus persicae, Aphis fabae and Aphis glycines

  • Feeding by larger numbers of aphids can cause curling, stunting, and wilting of leaves
  • Feeding by small or moderate numbers of aphids usually does not cause visible symptoms
  • Active during spring and summer
  • Small insects (1/10th inch long), pear-shaped, usually greenish; clustered on underside of leaves
  • More information on Aphids...

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