Location: Systematic Entomology LaboratoryTitle: Leaf mining insects and their parasitoids in the old-growth forest of the Huron Mountains
Submitted to: Great Lakes Entomologist
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 6/25/2019
Publication Date: N/A
Interpretive Summary: Parasitic wasps attack agricultural and forest pests that cause billions of dollars of damage annually. The wasps treated in this paper attack leaf-mining insects that feed primarily on hardwood trees. Determining the spatiotemporal occurrence and host range of these wasps is critical for understanding how they impact host populations and in turn forest ecosystems. We report 67 leaf-mining taxa collected from 38 plant species resulting in 15 new host-host plant associations. We also report 42 wasp taxa reared from leaf-miner hosts, including 32 new wasp-host associations. Six wasp species are reported from the Western Hemisphere for the first time. This paper will be useful to scientists conducting research on these wasps, hosts, and host plants, as well as personnel in ecology, conservation biology, and insect pest management.
Technical Abstract: Leaf mining insects in an old-growth forest along the south central shore of Lake Superior in Michigan (U.S.A.) are documented. We present the results of a 13-year survey of leaf mining species, larval hosts, seasonal occurrence, and parasitoids, as well as report biological observations. All data were obtained from individually reared specimens. Representative larvae, mines, adults, and parasitoids were preserved. Data from 220 rearings were used to document the occurrence of 67 mining taxa in 38 host plant taxa. Among the larval host associations, 15 are newly reported. Additionally, 42 parasitoid taxa were identified resulting in six first reports from the New World and 32 new host associations. Two undescribed species (Gelechiidae and Figitidae) discovered through this research were described in earlier publications. Photographs are included of 111 mines and adult leaf miner specimens.