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Leptinotarsa decemlineata
Colorado potato beetle, Colorado beetle, ten-striped spearman, ten-lined potato beetle, potato bug
Leptinotarsa decemlineata is a major agricultural pest of potato and other solanaceous crops, causing approximately half a billion dollars in annual crop losses globally. Native to Mexico and originally associated with buffalo bur (Solanum rostratum), it shifted to potato as a host around 1860 and subsequently expanded its range across North America, Europe, and Asia. The species is notorious for its rapid evolution of resistance to insecticides, making it a model organism for studying pesticide resistance and integrated pest management strategies. Both larvae and adults feed on foliage, with the fourth instar consuming the most plant material.