The biology and distribution of the switchgrass gall midge, an emerging pest in Ontario

Lead Applicant: Rebecca Hallett

Research Priority: Plant Health & Protection Projects

Program Type: Tier 1

Funding Cycle: 2022/2023

Research Centre: Ontario Crops Research Centres – Elora & Simcoe

Research Summary: The switchgrass gall midge (SGM) was first detected in Ontario in 2020 by OMAFRA staff. Larvae of SGM develop within switchgrass tillers, causing 100% seed loss and 35% biomass yield reduction in infested tillers. Literature on SGM is insufficient and limited to South Dakota. There is a need to document the phenology and distribution of SGM in Ontario. This project will develop diagnostic tools and initial integrated pest management recommendations for switchgrass producers.