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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Annuals and Perennials > Milkweed

Annuals and Perennials > Milkweed

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  • aphid 1
    Credit: Jeff Hahn
  • aphid 2

    Credit: Terry Straub

  • - CLICK PHOTOS TO ENLARGE -

green arrowAphids

  • Occurs during summer
  • Feed in large groups on leaves and stems
  • No other injury visible
  • Tiny, yellow to orange aphids with black legs
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  • monarch caterpillar 1
    Credit: Jeff Hahn
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green arrowMonarch caterpillar

  • Occurs during summer
  • Chews holes along the edge of leaves
  • White with yellow and black markings, up to 2 inches long
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  • four-eyed bug 1
    Credit: Jeff Hahn
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green arrowFour-eyed milkweed beetles

  • Occurs during mid to late summer
  • Chew holes in leaves
  • Red with black spots and long antennae, 1/2 inch long
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  • Herbicide 3
    Credit: Michelle Grabowski
  • Herbicide 1

    Credit: Michelle Grabowski

  • Herbicide 2

    Credit: Michelle Grabowski

  • - CLICK PHOTOS TO ENLARGE -

green arrowHerbicide Damage
Phenoxy herbicide ex. 2,4D

  • Leaves are twisted, cupped, or distorted
  • Leaves may appear thick and leathery
  • Veins in leaves are thick and close together
  • Side of the plant closest to the herbicide application is most severely affected
  • In severe cases the entire plant may be affected
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  • Hail 1
    Credit: Mary Meyer
  • - CLICK PHOTO TO ENLARGE -

green arrowHail

  • Ragged holes in foliage
  • Appears suddenly, after sever weather
  • Affects very local area only, sometimes individual plants show damage
  • Plants outgrow damage, leaves produced after hail event are undamaged

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