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Environ Entomol

Title:		Quantitative association of bark beetles with pitch canker fungus and effects of verbenone on their semiochemical communication in Monterey pine forests in Northern Spain
Author(s):		Romon P; Iturrondobeitia JC; Gibson K; Lindgren BS; Goldarazena A;
Address:		"NEIKER-TECNALIA, Basque Institute of Agricultural Research and Development, Department of Plant Production and Protection, Arkaute, 46 01080 Vitoria, Spain"
Journal Title:		Environ Entomol
Year:		2007
Volume:		36
Issue:		4
Page Number:		743 - 750
DOI:		10.1603/0046-225x(2007)36[743:qaobbw]2.0.co;2
ISSN/ISBN:		0046-225X (Print) 0046-225X (Linking)
Abstract:		"The association between 11 species of bark beetles (Coleoptera: Scolytinae) and one weevil (Coleoptera: Entiminae) with the pitch canker fungus, Fusarium circinatum Nirenberg and O'Donnell, was determined by crushing beetles on selective medium and histone H3 gene sequencing. Pityophthorus pubescens (Marsham) (25.00%), Hylurgops palliatus (Gyllenhal) (11.96%), Ips sexdentatus (Borner) (8.57%), Hypothenemus eruditus Westwood (7.89%), Hylastes attenuatus Erichson (7.40%), and Orthotomicus erosus (Wollaston) (2.73%) were found to carry the inoculum. In addition, the root weevil Brachyderes incanus L. (14.28%) had the second highest frequency of occurrence of the fungus. The responses of the insects to a range of verbenone doses were tested in field bioassays using funnel traps. Catches of P. pubescens, a species colonizing branch tips of live trees, were significantly reduced in a log-linear dose-dependent relationship. Catches of I. sexdentatus, an opportunistic species normally attacking fresh dead host material, were also gradually reduced with increasing verbenone dose. Catches of Tomicus piniperda L., O. erosus, Dryocoetes autographus (Ratzeburg), H. eruditus, Xyleborus dryographus (Ratzeburg), Hylastes ater (Paykull), Hylurgus ligniperda (F.), H. attenuatus, and B. incanus were not significantly affected by verbenone. The effects of verbenone were consistent with differences in host-age preference. Semiochemical disruption by verbenone in P. pubescens and I. sexdentatus could represent an integrated pest management strategy for the prevention of the spread of pitch canker disease between different stands. However, several species associated with F. circinatum were unaffected by verbenone, not supporting this compound for prevention of the establishment of potential vectors in Northern Spain"
Keywords:		"*Animal Communication Animals Bicyclic Monoterpenes Coleoptera/*drug effects/metabolism/*microbiology Dose-Response Relationship, Drug Fungi/*isolation & purification Pheromones/*metabolism Pinus Spain Terpenes/*pharmacology Trees;"
Notes:		"MedlineRomon, Pedro Iturrondobeitia, Juan Carlos Gibson, Ken Lindgren, B Staffan Goldarazena, Arturo eng Research Support, Non-U.S. Gov't England 2007/08/25 Environ Entomol. 2007 Aug; 36(4):743-50. doi: 10.1603/0046-225x(2007)36[743:qaobbw]2.0.co; 2"