Abstract
Courtship interactions of the papaya fruit fly, Toxotrypana curvicauda Gerstaecker, were observed and described in the development of an arena sex pheromone bioassay. Females responded to male-produced volatile chemicals presented on filter paper in arena bioassays by walking, running, flying, bobbing the abdomen, and turning in circles. Significant responses were obtained at concentrations as low as 0.0004 male-h equivalents. In a wind-tunnel bioassay, females flew upwind to calling caged males, landed on the cages and bobbed their abdomens. Females responded to male odors piped into the upwind end of the tunnel from a glass chamber that contained calling males by flying upwind in the tunnel with a zigzagging flight pattern and hovering in the plume near the pipe vent.
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