Abstract
White-spotted longicorn beetle, Anoplophora malasiaca (Thomson) (Coleoptera: Cerambycidae), females were observed to use both olfactory and visual cues for orientation to males in the laboratory. When a freshly killed male was fixed at ca. 10 cm ahead and 5 cm to the right or left from a starting point on a 75° slope panel, 36% of the females oriented themselves toward the male before direct contact. Similar behavioral responses to a glass-rod model treated with male extract were observed. When a black or white glassrod treated with the extract was presented, the orientation toward the black rod was significantly greater than that to the white one. Few females oriented toward rods without extract. This indicates that the olfactory cue is essential for female orientation, and that a visual cue enhances the effect of the olfactory cue.
