Abstract
Blacklight traps were used successfully for surveying fruit insect pest populations in Wisconsin orchards from 1956 through 1962 (Oatman 1964). The traps were of an omnidirectional design with a 15-w blacklight fluorescent lamp mounted vertically in the center of a single baffle. When suspended in an orchard, the light attracted insects from all directions for considerable distances. As a result, voluminous numbers of insects foreign to fruit trees were caught, especially on still, warm nights. Separating known pest species from even 1 night's catch was a laborious, time-consuming task.
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