The role of lanierone in the chemical ecology ofIps pini (Coleoptera: Scolytidae) in California |
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| Authors: | Steven J. Seybold Stephen A. Teale David L. Wood Aijun Zhang Francis X. Webster Kenneth Q. Lindahl Jr. Isao Kubo |
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| Affiliation: | (1) Department of Entomological Sciences, School of Public Health University of California at Berkeley, 94720 Berkeley, California;(2) Group in Biostatistics, School of Public Health University of California at Berkeley, 94720 Berkeley, California;(3) Department of Environmental and Forest Biology, College of Environmental Science and Forestry State University of New York, 13210 Syracuse, New York;(4) Department of Chemistry, College of Environmental Science and Forestry State University of New York, 13210 Syracuse, New York;(5) Present address: Data Communication and Network Services, Information Systems and Technology, University of California at Berkeley, 94720 Berkeley, California |
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| Abstract: | Five doses of lanierone (2-hydroxy-4,4,6-trimethyl-2,5-cyclohexadien-1-one) were tested with one dose of enantiomerically pure [99.4% (4R)-(–)] ipsdienol (2-methyl-6-methylene-2,7-octadien-4-ol) for activity as an aggregation pheromone ofIps pini (Say) in California. The response ofI. pini to 1 mg/day ipsdienol + 20  g/day lanierone was significantly greater than the response to ipsdienol alone, but the response pattern did not demonstrate a clear dose-response relationship. The response to the highest dose of lanierone (2 mg/day) was significantly lower than the response to ipsdienol alone. Ipsdienol attracted significantly moreI. pini than a male-infested log. Lanierone did not alter the percentage of maleI. pini responding to ipsdienol alone. Neither sex ofI. pini orDendroctonus brevicomis LeConte from California produced detectable amounts of lanierone, but myrcene-aerated maleD. brevicomis produced 97.8%-(4S)-(+)-ipsdienol. The black-bellied clerid,Enoclerus lecontei (Wolcott) (Coleoptera: Cleridae) was attracted to lanierone when released with ipsdienol. Neither compound was attractive when released alone, proving synergism for the kairomone of this predator. Lanierone did not influence the response of the predatorsTemnochila chlorodia (Mannerheim) (Coleoptera: Trogositidae) andEnoclerus sphegeus (F.) (Coleoptera: Cleridae), which were attracted to all treatments containing ipsdienol.Tomicobia tibialis Ashmead (Hymenoptera: Pteromalidae) responded in significantly greater numbers to the male-infested log than it did to ipsdienol or ipsdienol + 20 g/day lanierone. |
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| Keywords: | Coleoptera Scolytidae Cleridae Trogositidae Pteromalidae Ips pini Dendroctonus brevicomis Enoclerus lecontei Enoclerus sphegeus Temnochila chlorodia Tomicobia tibialis ipsdienol lanierone aggregation pheromone kairomone |
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