Taxonomic-clarification
Guides
Heilipus squamosus
Avocado Weevil, Avocado Tree Girdler
Heilipus squamosus is a large weevil native to the southeastern United States and the sole species of its genus occurring in North America. It gained notoriety as the "avocado tree girdler," causing significant economic damage to Florida avocado groves from the late 1930s through the 1950s, with larval feeding resulting in 8-10% tree mortality. The species was historically considered rare outside avocado-producing regions, but 21st-century citizen science observations have expanded its known range from eight to fifteen states. Long confused with the French Guiana species H. apiatus due to an erroneous distribution in the original 1807 description, this nomenclatural issue was clarified in 2022.