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Entomology

University of Wyoming Extension

Insects in the Garden

Blister Beetle

Blister Beetle

This is the famed Spanishfly beetle that produces cantharidin, resulting in a blistering effect that is especially problematic with horse feed. Adults are particularly attracted to alfalfa blooms, creating a serious forage health issue when transferred to stock feed. In the garden, they produce only minor plant damage, but their blistering effects are a health concern.

Photo: Ward Upham, Kansas State University, Bugwood.org

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