Gamma Radiation Unpromising as an Insect Quarantine Treatment for Fraser Fir Branches

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  • 1 Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695-7609

Dormant branches of Fraser fir [Abies fraseri (Pursh) Poir.] Christmas trees were subjected to single doses of gamma radiation at levels ranging from 0 to 5.0 kGy (0 to 500 kRad). Significant needle loss resulted at doses ≥0.10 kGy and increased with radiation intensity. Irradiation discolored foliage and accelerated drying. Irradiation does not appear to be a viable way to meet insect quarantine requirements on cut Fraser fir Christmas trees.

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