. A comparison of radiographic and bark-removal methods for sampling of mountain pine beetle populations. Mountain pine beetle; Sampling. 30. 0 .5 10 20 30 SLAB THICKNESS (IN.) Figure 2.—X-ray exposure curves for v)ood and bark slabs' (lodgepole pine) of different thickness and moisture content when the X-ray unit is operating at 25kV, 5mA, using a 51-am (1 inch = cm) target film distance (from Arrman and Rasmussen, J. Econ. Entomol. 62:631-634, 1969).^ Radiographs were processed and then interpreted independently by two observers. A light table, on which all light except for a 15
. A comparison of radiographic and bark-removal methods for sampling of mountain pine beetle populations. Mountain pine beetle; Sampling. 30. 0 .5 10 20 30 SLAB THICKNESS (IN.) Figure 2.—X-ray exposure curves for v)ood and bark slabs' (lodgepole pine) of different thickness and moisture content when the X-ray unit is operating at 25kV, 5mA, using a 51-am (1 inch = cm) target film distance (from Arrman and Rasmussen, J. Econ. Entomol. 62:631-634, 1969).^ Radiographs were processed and then interpreted independently by two observers. A light table, on which all light except for a area had been blocked out, was used for radiograph interpretation. Insects and their identification were recorded on mattex acetate placed over the radiograph. Counts of insects and stages were made from the overlays. Data were analyzed by means of analysis of variance. The comparisons made between radiographic and bark-removal sampling were based on averages of estimates obtained by both observers. 4-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Amman, Gene D. cn; Rasmussen, Lynn A. cn; Intermountain Forest and Range Experiment Station (Ogden, Utah) 1n. Ogden, Utah : Intermountain Forest & Range Experiment Station, Forest Service, U. S. Dept. of Agriculture
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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
