The Effects of Hue and Intensity on Visual Attraction of Adult Tabanus Nigrovittatus (Diptera: Tabanidae)1

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Abstract
The visual attraction of adult Tabanus nigrovittatus to various hues and intensities was studied in a Spartina salt marsh in Essex Co., Massachusetts, USA, using 2-dimensional sticky panels. Collections consisted mainly of host-seeking parous females (98%); the remainder were nulliparous females and males. Parous females were strongly attracted to blue and moderately attracted to black and red, all of which have low reflectance from 400 to 800 nm. Yellow, yellow-green, and white were consistently unattractive. Attraction to white panels, with and without UV reflection, and aluminum foil varied inversely with the amount of UV reflected. Increasing or decreasing intensity of hues increased attraction of flies, a result of increased contrast with the background.

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