Evaluation of a "cow-type" silhouette trap with and without CO2 bait for monitoring populations of adult Simulium luggeri (Diptera: Simuliidae).

A "cow-type" silhouette trap with "head" and "body" collecting chambers was evaluated for use in monitoring adult populations of Simulium luggeri in Saskatchewan. Ninety-five percent of the black flies taken were S. luggeri. Other species collected included S. vittatum, S. meridionale, S. venustum and S. decorum. Traps baited with CO2 collected significantly more (P less than 0.01) S. luggeri than unbaited traps. The "body" collecting chamber took significantly more (P less than 0.01) S. luggeri than the "head" collecting chamber.