blister beetle striped 1 MER copy.jpg

Striped blister beetle grub


  • Adult: Slender beetle with a prominent head and black and orange stripes.
  • Larvae: Reddish brown with dark brown bands on the thorax and abdomen. Feed on grasshopper eggs.
  • Eggs: White and oval with rounded ends. Laid in tube-shaped chambers in the soil near grasshopper eggs. 

Timing of damage: V2 to V6

Type of damage: Defoliation of leaves.

Scouting: Use a sweep net or drop cloth to determine the presence of beetles. Estimate the percentage of foliage loss at each point where beetles are found.

Economic threshold: Foliage loss of 35% prebloom or 15% postbloom.

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