The results of a two-year study in Michigan on the incidence of Coenosia tigrina adults under different onion production practices is presented. In Michigan, C. tigrina has three generations and is more abundant in organic agroecosystems than chemically-intensive onion production systems.
Drummond, Francis A.; Groden, Eleanor; Haynes, D. L.; and Edens, Thomas C.
"Some Aspects of the Biology of a Predaceous Anthomyiid Fly, Coenosia Tigrina,"
The Great Lakes Entomologist: Vol. 22
, Article 2.
Available at: http://scholar.valpo.edu/tgle/vol22/iss1/2