Colorado potato beetle

Definition

A leaf beetle (family Chrysomelidae) and the most economically significant pest of cultivated potato (Solanum tuberosum), characterized by a rounded, convex body approximately 10 mm long with bright yellow-orange elytra marked by ten dark longitudinal stripes (five per wing). Native to the Rocky Mountain region where it fed on wild Solanum species, it expanded its range dramatically following the widespread cultivation of potatoes in the mid-19th century, becoming invasive across North America, Europe, and Asia. The species is notorious for its rapid development of insecticide resistance and its ability to defoliate potato plants at both larval and adult stages.

Etymology

Named for the U.S. state of Colorado, near its native range in the Rocky Mountains, and its primary host crop; the scientific epithet decemlineata refers to the ten stripes (Latin decem, ten; lineata, lined).

Example

Colorado potato beetle populations in the northeastern United States have evolved resistance to more than 50 different insecticide chemistries, making integrated pest management strategies—combining crop rotation, resistant cultivars, and targeted biological control with Beauveria bassiana—essential for sustainable potato production.

Synonyms

• Colorado beetle
• ten-striped spearman

Related Terms

• Leptinotarsa decemlineata
• Chrysomelidae
• defoliation
• insecticide resistance
• crop rotation
• Integrated Pest Management
• Solanaceae
• Host plant resistance

Usage Notes

Often shortened to "Colorado beetle" in European contexts, though this can cause confusion with unrelated beetles. The common name properly refers to the species Leptinotarsa decemlineata; the genus contains other less damaging species sometimes called "false potato beetles." In agricultural entomology, the acronym CPB is common in literature and extension materials. The species is a model organism for studying rapid adaptation and resistance evolution in insects.