Ambrosia beetles construct galleries in the sapwood of a wide variety of stressed woody hosts where they culture symbiotic fungi as food for their offspring. The introduced Asian Anisandrus maiche (Coleoptera: Curculionidae) was first recorded in 2005 in Pennsylvania and has spread to several additional states and into Canada. We first trapped A. maiche in central New York in 2021, but it likely had been present for several years. It can be abundant in traps and shares similarities with the known pest Xylosandrusgermanus. Therefore, it is considered a potential new pest. Little has been reported on its biology in North America, so we conducted a two-year study on its phenology and voltinism by rearing beetles outdoors in wood bolts. Unlike other pest species that overwinter as adults, A. maiche overwinters as mature 3rd instars (male and female) inside their natal galleries. Pupation and adult eclosion occur in May. After mating with their male siblings, females disperse to initiate new galleries. Two flights occur from late May-July (overwintered generation) and July-early September (first summer generation). Two overlapping generations occur each year. Additional information on the duration of individual generations over two years and phenology of brood development will be presented.
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