Poster: Seasonal patterns of ambrosia beetle flight across a forest to apple orchard gradient

Infestations of Xylosandrus germanus (black stem borer, Coleoptera: Curculionidae) were first reported in New York apple orchards, grown on dwarf rootstocks, in 2013. Trapping for X. germanus in subsequent years has been used to assist growers in the timing of preventative control measures. We learned in 2021 that X. germanus can have three flight periods and that a similar-looking species, Anisandrus maiche, was also being caught in ethanol-baited traps in central New York. Anisandrus maiche was first recorded in 2005 in Pennsylvania but its history in New York apples is unclear. We trapped ambrosia beetles using ethanol-baited bottle traps in 2022 and 2023 at two commercial apple orchards near Lake Ontario and two cider apple orchards in the lower Finger Lakes district. Traps were placed at the orchard edge, a nearby forest edge and forest interior at each orchard. Information will be presented on the identity, abundance and diversity of ambrosia beetle species over different locations, habitats and seasons.