Attributes of Yellow Traps Affecting Attraction of Diaphorina citri (Hemiptera: Liviidae)

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.

A Multimodal Attract-and-Kill Device for the Asian Citrus Psyllid Diaphorina citri (Hemiptera: Liviidae)

“…Attraction of D. citri to wavelengths perceived as yellow or lime-green in the human visual spectrum has been well documented and is the basis for the use of the "yellow or lime-green" sticky trap for surveillance [11]. In field tests of multiple yellow reflective paints, we found that D. citri adults exhibited greater attraction to fluorescent yellow colors than to the bright yellow color used in standard sticky card traps [17]. Therefore, a fluorescent yellow color, shown to be the most attractive to D. citri in our earlier tests [17], was incorporated into the SPLAT matrix evaluated here.…”

“…In field tests of multiple yellow reflective paints, we found that D. citri adults exhibited greater attraction to fluorescent yellow colors than to the bright yellow color used in standard sticky card traps [17]. Therefore, a fluorescent yellow color, shown to be the most attractive to D. citri in our earlier tests [17], was incorporated into the SPLAT matrix evaluated here. Paris et al (2017) [16] demonstrated increased attraction of D. citri to yellow and green stimuli by incorporating UV reflectants compared with the same colors without UV.…”

Field Evaluation of Attract-And-Kill Devices for Control of Asian Citrus Psyllid (Hemiptera: Liviidae) in Urban Landscapes

“…In addition, Allan et al (2020) showed that bright yellow targets with black edges caught 3 times as many psyllids as did solid bright yellow targets. In our test, the contrast of the black screen against the inner yellow cylinder may have presented a visual pattern that was like the attractive yellow and black pattern observed by Allan et al (2020). No increase in trap captures was observed by the addition of the acid mix as a scent attractant to the black screen AKD, which is consistent with the results obtained with the yellow perforated cylinder AKD.…”

Effect of host plants on development and reproduction of Diaphorina citri and their host preference

“…Paris et al (2015) found a significant chemotaxis response of adult psyllids to treatment chemicals with only visual cues, in absence of olfactory stimulation, in a laboratory experiment. Decoy yellow and fluorescent yellow sticky traps were reported to be strongly attractive to D. citri (Allan et al, 2020). In addition, host plant nutrition, leaf surface morphological characteristics, and host plant surface compounds also influence the process of D. citri host recognition and acceptance.…”