Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Brief illustrated key to the identification of elm bark beetles (Scolytus spp.) (Coleoptera, Scolytidae) in Italy.

Abstract

The spread of Dutch Elm Disease is due mostly to bark beetles of the genus Scolytus. In Italy, eight species (S. ensifer Eichhoff, S. kirschii Skalitzky, S. laevis Chapuis, S. multistriatus (Marsham), S. pygmaeus Fabricius, S. scolytus Fabricius, S. sulcifrons Rey and S. triarmatus Eggers) are known to live on elms [Ulmus], and in four cases (S. multistriatus, S. pygmaeus, S. sulcifrons and S. triarmatus) the transmission of Ophiostoma novo-ulmi was assessed. A brief descriptive identification key based on external morphology of adults is presented. The proposed characters are as follows: shape and density of hairs at the apex of the 5th abdominal sternite, structure and pubescence of the frons, occurrence of a process on the posterior margin of the 2nd sternite, and presence of tubercles on the posterior margins of the 3rd and 4th sternites.