The group composition of epicuticular waxes of the five Polish varieties of Solanum tuberosum were studied by HPLC, GC, and GC/MS. Alkanes, alcohols (primary and secondary), fatty acids and ketones (terminal and internal) were identified and quantified. The quantitative compositional results were analysed by chemometrie methods such as cluster and principal component analysis. A correlation was found between Colorado potato beetle infestation and quantities of specific chemical groups in epicuticular waxes.