Karsky, Dick ; Strom, Brian ; Thistle, Harold W.. 2004. An Improved Method for Collecting and Monitoring Pine Oleoresin. 0434 2306. Missoula, MT: U.S. Department of Agriculture, Forest Service, National Technology and Development Program. 4 p.
Describes a sampling device that can be used to measure resin flow after a small plug of bark has been punched from a pine tree. Resin flow can be a measure of a pine tree's resistance to attack by bark beetles, tiny insects that can kill a tree if enough of them begin reproducing in the living tissue beneath the tree's bark. The new sampler is sealed, preventing the resin it collects from being contaminated by rain or debris. The amount of resin collected in this sampler can be compared to the amount collected in the old unsealed samplers. The collection vial is a standard threaded centrifuge tube. The sampler costs $1.50, is reusable, and is watertight.
Keywords: biomass, collection, handling, use, utilization
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