Attraction of the Japanese pine sawyer, Monochamus alternatus, to volatiles from stressed host in China

Free access article

Issue		Ann. For. Sci. Volume 64, Number 1, January-February 2007


Page(s)		67 - 71
DOI		10.1051/forest:2006089
Published online		16 January 2007

Ann. For. Sci. 64 (2007) 67-71
DOI: 10.1051/forest:2006089

Attraction of the Japanese pine sawyer, Monochamus alternatus, to volatiles from stressed host in China

Jianting Fan^{a, b}, Jianghua Sun^a and Jin Shi^c

^a State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100080, China
^b Graduate School of the Chinese Academy of Sciences, Beijing 100080, China
^c Forest Pest Control Station of Anhui Province, Hefei 230031, China

(Received 15 July 2005; accepted 26 April 2006; published online 16 January 2007)

Abstract - Ovipositing female Japanese sawyer beetles, Monochamus alternatus, prefer stressed Pinus massoniana over healthy trees. Host discrimination by M. alternatus suggests that changes in the chemical composition of pines may mediate the host preference of beetles. Volatile compounds from stressed and healthy pine stems were collected using absorbent trap collection method. Significant differences in absolute terpene quantities between stressed and healthy pines occurred for 7 of 10 terpenes. Field trials demonstrated that four terpenes identified from host pines were attractive to M. alternatus with (+)- $\alpha$ -pinene as the most attractive compound to M. alternatus. Ethanol appeared to be an important synergistic compound causing significant increase in attraction.

Résumé - Des composés émis par les arbres-hôtes stressés sont attractifs pour le cérambycidé Monochamus alternatus. Les femelles du cérambycidé Monochamus alternatus préfèrent pondre sur les arbres stressés que sur les arbres sains de Pinus massoniana. Cette discrimination dans le choix de l'hôte par l'insecte pourrait être reliée à des modifications intervenues dans la composition chimique des pins. Les composés volatils émis par des pins stressés et sains ont été collectés en utilisant une méthode de piégeage sur résine adsorbante. La quantité absolue de 7 terpènes sur les 10 analysés diffère significativement entre pins stressés et sains. Des essais sur le terrain ont montrés que 4 de ces terpènes sont attractifs pour M. Alternatus. l'(+)- $\alpha$ -pinène étant le compose le plus attractif. L'éthanol semble être un composé synergique induisant une augmentation significative de l'attraction.

Key words: Monochamus alternatus / pine volatile / trapping / terpene / attractant

Mots clés : Monochamus alternatus / composés / volatil des pins / piégeage / terpènes / attractif

Corresponding author: sunjh@ioz.ac.cn

© INRA, EDP Sciences 2007

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