• Attraction;
  • behaviour;
  • Brontispa longissima;
  • Cocos nucifera

Brontispa longissima (Gestro) (Coleoptera: Hispidae) is a new invasive pest in China that has caused severe economic damage to palm trees (Arecaceae, Palmae). The response of this beetle to coconut palm (Cocos nucifera) leaf volatiles is investigated in laboratory bioassays. Both sexes are attracted to a mixture of β-myrcene, (−)-limonene and E-2-hexen-1-ol (1 : 6 : 1), which are key components of coconut palm leaf volatiles. A blend of β-myrcene and (−)-limonene (0.7 : 1–1 : 0.7) in low amounts (100 ng) elicits aggregation and oviposition in females. Chemical analyses of food-deprived, gravid female B. longissima show high concentrations of β-myrcene and (−)-limonene in their accessory glands, suggesting that female beetles sequester both compounds and release them during oviposition.