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10-Minute Presentation

Plant-Insect Ecosystems

10-min: P-IE, Apiculture and Pollinators

Host-pathogen dynamics in response to resource pulses: effects of blooming cover crops on bee pathogen transmission

Sunday, November 9, 2025
5:06 PM - 5:18 PM Pacific
Location: Oregon Convention Center, E143-144, OCC
Oral Presentation
Supplemental forage is often provided in agricultural landscapes to mitigate negative effects of land use intensification on pollinators. In addition to impacting reproductive output, increased floral resource availability may benefit pollinators by improving immunity to disease or by reducing disease transmission. We evaluated how supplemental forage from a mass blooming cover crop (Vicia villosa) and local floral resource availability affect bee foraging dynamics, pathogen prevalence in solitary and social bee species, and reproduction of the solitary species Osmia lignaria. We found that mass bloom concentrated bees in cover crop plantings but had no effect on reproductive output of Osmia lignaria. Visual symptoms of Ascosphaera infection varied across sites. This work adds to our understanding of the varied ways that land management and landscape characteristics shape pollinator population and disease dynamics.