Spectral preference and temporal modulation of photic orientation by Colorado potato beetle on a servosphere

摘要: The Colorado potato beetle (CPB), Leptinotarsa decemlineata (Say) (Coleoptera: Chrysomelidae), is a diurnal insect that strongly relies on visual cues to guide its walk. In the present study, we investigated orientation behavior of non-diapausing walking CPB in response emissive colors produced by light emitting diodes (LEDs) dual choice arena adapted servosphere, where only illumination available came from photo-stimuli. Our results demonstrate show positive phototactic when stimulated with different wavelengths light; they preferred orient towards white (420-775 nm), ultraviolet (UV) (351 blue (472 green (570 yellow (585 orange (590 and red (660 nm) over darkness both alternatives were offered, but no responses elicited infrared (940 nm). Both males females other colors, did not any particular preference between them, thus correlating their for reflected vegetation. Sexual differences noted male either or UV, whereas female preferences offered these colors. Female UV red, showed offered. beetles turned at higher angles performed more tortuous walks complete vs. compared rest colored lights. sexes continuous pulsed light. subjected temporal alteration performance less, slower, turning rate. are discussed regard role color attraction host plants conspecifics as well intermittent photic stimuli behavior. information provided here provides basis improvement trapping devices detection survey incipient invasive CPB, development alternate control strategies this important pest potatoes solanaceous crops.