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Abstract
The use of large-scale 70 mm. aerial photography proved to be an effective technique for detecting trees in white fir stands killed by Douglas-fir tussock moth in northeastern California. Correlations between ground and photo estimates of dead trees were high. But correlations between such estimates of lesser degrees of tree damage--thin tops and topkill--were much lower; increased training of interpreters could improve these correlations.
Keywords
Douglas-fir tussock moth,
Hemerocampa pseudotsugata,
white fir,
Abies concolor,
aerial photography,
photo interpretation,
photogrammetry,
remote sensing,
insect damage,
defoliation damage,
California
Citation
Wert, Steven L.; Wickman, Boyd E. 1968. White fir stands killed by tussock moth...70-mm. color photography aids detection. Res. Note PSW-RN-168. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 5 p.
