Pheromone Production, Attraction, and Interspecific Inhibition among Four Species of Ips Bark Beetles in the Southeastern USA

Figure 1

GC chromatograms from GC-MS analyses of male hindgut extracts. MB: 2-methyl-3-buten-2-ol; Id: ipsdienol; Ie: ipsenol; cV: cis-verbenol; tV: trans-verbenol; Ln: lanierone; Mt: myrtenol; Ger: geraniol; tM: trans-myrtanol; EM: E-myrcenol; PE: 2-phenyl ethanol; *: internal quantification standard, heptyl acetate (C₇Ac) amount varies between sample—see the following (for full list of identified compounds and quantities, see Table 4). (a) I. avulsus 15 males: C₇Ac is 100 ng. (b) I. calligraphus 4 males: C₇Ac is 1000 ng. (c) I. grandicollis 5 males: C₇Ac is 100 ng. (d) I. pini 10 males: C₇Ac is 1000 ng.

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