Montana surveys of codling moth damage to apple fruit 2019-2020

Codling moth (Cydia pomonella) is the major insect pest of pome fruit (apples and pears) in Montana. This dataset reports codling moth damage to apple fruit ("strikes") in Montana orchards where site managers were not applying pesticides to control codling moth. Data was collected in August or September of 2019 and 2020. Certain sites east of the continental divide have nominally lower incidence of codling moth damage to fruit than sites west of the divide. Due differences in weather year-to-year, we recommend continued monitoring.