Potatoes, Solanum tuberosum L., are a major crop in the Columbia Basin of Oregon and Washington. In the field, aphids including the green peach aphid Myzus persicae Sulzer, potato aphid Macrosiphum euphorbiae Thomas, beet leafhopper Circuliffer tenellus Baker, potato tuber worm Phthorimaea operculella Zeller, Colorado potato beetle Leptinotarsa decemlineata Say, and potato psyllid Bactericera cockerelli Šulc, are among the primary pests in the region. In storage, few insect pests are reported and occurrences may be related to field infestations that have been inadvertently moved into the storage units. In 2017, a report was made regarding the presence of ‘slugs’ in a controlled storage unit. The ‘slug’ was identified by R. Mc Donnell, as the gray field slug, Deroceras reticulatum (Müller) (Gastropoda: Agriolomacidae). To our knowledge, this is the first report in the United States of the presence of D. reticulatum infesting potatoes in storage. With this first report of D. reticulatum in a commercial storage facility, which appears to be an isolated event, it is clear that there are a number of knowledge gaps that need to be addressed. In a series of experiments, it was determined that D. reticulatum can feed on potato tubers and can cause considerable damage. However, low temperatures inside storage units slow D. reticulatum population ability to produce subsequent offsprings. Although it appears to have been an isolated incident, growers and other stakeholders should be aware that D. reticulatum is present in the Columbia Basin and can potentially inflict damage to potatoes.