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Monoterpene-Fusiform Rust Relationships in Loblolly Pine. Donald L. Rockwood, Former Research Assistant, School of Forest Resources, North Carolina State University, Raleigh, North Carolina 27607, Present address: Forest Physiology-Genetics Laboratory, University of Florida, Gainesville 32601; Phytopathology 63:551-553. Accepted for publication 30 October 1972. DOI: 10.1094/Phyto-63-551.

Correlations among the monoterpenes in the stem xylem and branch cortex of loblolly pine and fusiform rust resistance are reported. Low amounts of branch cortex β-phellandrene were phenotypically and genetically associated with resistance. Indirect selection for rust resistance on the basis of low content of β-phellandrene may be more productive than direct mass selection.