THE USE OF MONOTERPENES AS KAIROMONES BY LATZDENS (LECONTE) (COLEOPTERA: SCOLYTIDAE)

The responses of Zps lutidens (LeConte) to multiple-funnel traps baited with various monoterpenes were determined in s tands of lodgepole pine in Bri t ish Columbia. P-Phellandrene was attractive to I. lutidens in the absence of the pheromone ipsenol. P-Phellandrene increased the attraction of I. lutidens to ipsenol-bai ted t raps while o-pinene, 3-carene, terpinolene, and myrcene reduced trap catches. Differential responses by males and females to sources of ipsenol with or without P-phellandrene suggest that the information conveyed to males differs from that conveyed to females. Species-specific responses to monoterpenes by I. lutidens and three sympatric species of scolytids suggest that unique combinations of kairomones could be important in facilitating matings with conspecifics. Pheromones need not be the sole constituent of species-specific chemical messages. La reponse d’lps lutidens (LeConte) a divers monoterpenes places dam des pieges a entonnoirs multiples a CtC determinCe dans des peuplements de pin lodgepole en Colom-bie britannique. P-Phellandrene a attire I. latidens en absence de la pheromone ipsenol. P-Phellandrene a accru I’attraction de I. Zutidens vers des pieges contenant ipsenol alors que cx-pinene, 3-carene, terpinolene et myrcbne ont reduit les captures. Des niveaux de reponse differents pour males et femelles a des sources d’ipdnol, avec ou saris P-phellandrene, suggbrent que l’information transmise aux males differe de celle trans-mise aux femelles. L’existence de reponses aux monoterpbnes specifiques a l’espece, pour I. lutidens et trois espbces sympatriques de scolytes, suggerent que des combi-naisons uniques de kairomones pourraient Ctre importantes dans la facilitation de l’ac-couplement avec des individus con-specifiques. Les pheromones ne sont pas neces-sairement les seules composantes des messages chimiques specifiques a l’espece