Formula for Describing Effect of Insect and Host Tree Factors on Resistance to Western Pine Beetle Attack1
- 15 December 1975
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Economic Entomology
- Vol. 68 (6) , 841-844
- https://doi.org/10.1093/jee/68.6.841
Abstract
A descriptive formula for the effect of insect and host tree factors on resistance to Dendroctonus brevicomis LeConte attack was developed. Research results suggest this formula: Resistance = f [(resin quantity, resin quality) ÷ (beetle attack density, beetle quality)], in which resin quality is measured by xylem monoterpene composition.Keywords
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