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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Vegetable > Asparagus > Ferns chewed

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Asparagus > Fern > Ferns chewed

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  • Image: Powdery Mildew 1
  • Image: Powdery Mildew 2
  • Image: Powdery Mildew 3

Common Asparagus Beetle
Crioceris asparagi

  • Adult feeding on asparagus spear causes spear to bend over into a shepherd's crook
  • Adults also feed on ferns; can severely defoliate plant
  • Larvae are slug-like, and light gray with a black head
  • Adult beetles are ¼ inch long, oval-shaped, bluish-black with six cream colored spots on its back
  • More information on Common Asparagus Beetle...
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  • Image: Powdery Mildew 1
  • Image: Powdery Mildew 2
  • Image: Powdery Mildew 3

Spotted Asparagus Beetle
Crioceris duodecimpunctata

  • Adult feeding on asparagus spear causes spear to bend over into a shepherd's crook
  • Larvae feed on berries, but do not damage the overall health of the plant
  • Adult beetles are ¼-inch long, oval-shaped, reddish-orange with twelve black spots
  • Larvae are slug-like, and yellowish-orange
  • More information on Spotted Asparagus Beetle...
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  • Image: Powdery Mildew 1
  • Image: Powdery Mildew 2

Cutworms
Agrotis ipsilon, Peridroma saucia

  • Stem chewed within 1 inch of base of plant (occurs during spring)
  • Damage occurs during spring and summer
  • Can feed on ferns, but not significant
  • Cutworms are grayish or brownish and up to 2 inches long; typically found during day hiding in soil
  • More information on Cutworms...

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