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.苹果蠹蛾（Codling moth, Cydia pomonella）是蒙大拿州梨果类作物（苹果与梨）的主要害虫。本数据集记录了蒙大拿州未施用杀虫剂防治苹果蠹蛾的果园中，苹果果实的蛀果数（strikes）。数据采集于2019年与2020年的8月或9月。大陆分水岭以东的部分采样果园，其苹果蠹蛾果实危害发生率名义上低于分水岭以西的果园。由于年度间气候存在差异，建议持续开展监测工作。