Abstract
Laboratory assays were conducted to evaluate responses of Diaphorina citri to various aspects of visual cues associated with traps in an effort to improve trap effectiveness. Addition of white or UV violet but not yellow light-emitting diodes (LEDs) increased attraction to standard yellow adhesive traps moderately (11–17%), with no difference in attraction between white or UV violet LEDs. Addition of a black border on yellow traps enhanced collections. However, there were no differences between attraction to black patterns on traps. Comparisons were made between different commercial paints, some with UV-reflecting properties or fluorescence. A yellow paint with UV reflectance, used for painting bird decoys (decoy yellow), was more attractive than the standard yellow Olson sticky trap. Addition of white or green pigment to increase intensity or enhance green reflectance, respectively, did not increase attraction. Alteration of reflectance of Olson traps with addition of UV-reflecting or fluorescent pigments did not enhance attraction of D. citri. In field comparisons, decoy yellow and fluorescent yellow sticky traps were more attractive to D. citri than Olson yellow.
Highlights
Huanglongbing or citrus greening disease severely limits citrus production in Florida and throughout the world
We evaluated aspects of yellow traps that may be manipulated to improve attraction of D. citri to visual targets
The response of adult D. citri to visual stimuli was evaluated with sticky-surfaced colored traps in a laboratory
Summary
Huanglongbing or citrus greening disease severely limits citrus production in Florida and throughout the world. D. citri to yellow sticky cards helps guide management decisions [5,6]. While these traps are a standard in the industry, they have limited ability to detect low levels of infestation [7]. These studies were initiated to examine visual properties in an attempt to produce a better trap and possibly to contribute to the production of an attract-and-kill device
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