Physical properties of the oleoresin system of the four major southern pines
Tuesday, November 19, 2013
JD Hopoes, WW ELAM, WF WATSON
Oleoresin viscosity, flow (rate, duration, and total amount), and rate of crystallization were determined for Pinuselliottii Engelm., Pinuspalustris Mill., Pinustaeda L., and Pinusechinata
Mill, in central Louisiana, U.S.A. Physical properties of the oleoresin
and tree morphological characteristics (diameter at breast height,
growth rate, height, crown ratio, and age) were not strongly related in
either of the four species. Pinuselliottii oleoresin was
extremenly viscous, crystallized very slowly, and flowed at a slow rate
over a long period, and total yield was moderate. Pinuspalustris oleoresin was of moderately high viscosity and very high yield and had a high rate of flow. Pinustaeda and Pinusechinata
oleoresin had, on the average, low viscosity, a moderate to low total
yield, a short duration of flow, and rapid rate of crystallization. A
discriminant function analysis revealed that 19% of the Pinustaeda and 6% of the Pinusechinata trees had oleoresin properties more similar to Pinuspalustris and Pinuselliottii than to the means for their own species. This information is being used to assess tree susceptibility to attack by Dendroctonusfrontalis Zimm.
... 1971. Comparison
of ﬁeld techniques for measuring moisture stress in large loblolly pines. For.
Sci. 17: 220-223. Joyce, MM, JR., AT PROVEAUX, and RB LAWRENCE. 1973.
Composition of neutral oils from rosin. J. Am. Oil. Chem. Soc. 50:
104-107. McREYNoLDs, RD 1971. ...