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Cortical Monoterpene and Fusiform Rust Resistance Relationships in Slash Pine. D. L. Rockwood, Research Associate, Forest Physiology-Genetics Laboratory, University of Florida, Gainesville 32611; Phytopathology 64:976-979. Accepted for publication 8 February 1974. DOI: 10.1094/Phyto-64-976.

Monoterpene composition of branch cortex oleoresin and fusiform rust resistance of slash pine were compared in six studies. Correlations between monoterpene content and rust resistance were generally variable, but a consistent relationship was observed for β-phellandrene. High amounts of β-phellandrene may be genetically, as well as phenotypically, related to resistance. Suggestions for potential use of β-phellandrene for increasing rust resistance of slash pine and examples of these applications are given.

Additional keywords: Cronartium fusiforme, Pinus elliottii var. elliottii, indirect selection.