The richness of Scolytinae was quantified in Hass variety avocado orchards located at different altitudes in three municipalities in the central part of the avocado-producing belt of the Mexican state of Michoacán. The study was carried out from July 2016 to June 2017. The insects were captured using α-copaene, ethanol and querciverol + ethanol lures, which were placed in bottle traps. A total of 9,444 specimens of 62 species belonging to 29 genera of Scolytinae were collected. The species Corthylus praeustus Schedl is a new record for Mexico, and 24 species are new records for the state of Michoacán. The highest abundance and lowest diversity of Scolytinae were found in Nuevo San Juan Parangaricutiro (27 species), followed by Uruapan (32 species), and the lowest abundance but highest diversity was found in Ziracuaretiro (40 species). The most abundant species of Scolytinae were Microcorthylus invalidus Wood, Araptus schwarzi (Blackman), Corthylus detrimentosus Schedl and Hypothenemus crudiae (Panzer), which together accounted for 72.47% of the specimens collected. The feeding habits of the species collected were xylomycetophagous (41.66%), phloeophagous (31.66%), myelophagous (11.66%), xylophagous (11.66%) and spermatophagous (3.33%).
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Vol. 74 • No. 2