Table 1. Amounts of alpha-pinene and myrcene in phloem samples (g dry weight, n=3) from five species of pine fed on by Ips paraconfusus (Sept. 3, 1985) and in oleoresina (Oct. 17, 1986). The major monoterpene in ponderosa and Jeffrey oleoresin was 3-carene (498.5 ug/ul and 16.4 ug/ul, respectively), while alpha-pinene predominated in digger, and lodgepole resin was mostly limonene (723 ug/ul). Total monoterpene percentage (including alpha- and beta-pinene, myrcene, 3-carene and limonene) of oleoresin was 83.5% for ponderosa, 89.9% for lodgepole, 2.9% for Jeffrey and 0.08% for digger, consistent with n-heptane as the major constituent of oleoresin in the latter two species [11]. | ||
Pine species | Amount ( ug per g phloem or ul resin ) | |
---|---|---|
alpha-Pinene | Myrcene | |
Ponderosa phloem | < 1.3 - 16.4 | 1.6 - 6.6 |
oleoresina | 34.9 - 48.8 | 94.9 - 139.0 |
Sugar phloem | 3.8 - 7.9 | 2.4 - 2.6 |
Jeffrey phloem | 152 - 445 | 15.8 - 52.6 |
oleoresin | 1.32 | 3.37 |
Digger phloem | < 0.01 | < 0.01 |
oleoresin | 0.68 | < 0.01 |
Lodgepole phloem | 35.0 - 76.3 | 18.6 - 39.0 |
oleoresin | 43.2 | 23.7 |
J. A. BYERS1 and G. BIRGERSSON2 1Department of Animal Ecology, Lund University, SE-223 62 Lund, Sweden Present address: 2Chemical Ecology, Göteborg University, SE-405 30 Göteborg, Sweden |
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