Effect of colour on male orientation to female pheromonein the black chafer Holotrichia loochooana loochooana

Summary. Under field conditions significantly more blackchafer, Holotrichia loochooana loochooana (Sawada)(Coleoptera: Scarabaeidae) males landed on black and graysources than white ones containing 10 mg of femalepheromone, anthranilic acid. When a broader spectrum ofcolours was tested the frequency of male landing was intensivelyproportional to as the lightness of the colour of thelures. These findings demonstrated that mate location byH. l. loochooana males is dependent on both olfactory and visual stimuli of the source. In contrast, female aggregation was notaffected by colour.