. A comparison of radiographic and bark-removal methods for sampling of mountain pine beetle populations. Mountain pine beetle; Sampling. Table 'Number, size, and sex ratio of beetles emerging from areas on the same trees where radiographic and bark-removal sampling were used. Average Standard Number/ Number-^ length deviation 50 .4 cm^ -----OT77----- RADIOGRAPHIC METHOD Male 6 0,62 Female 15 .53 Unidentified^ __3 -- -- .5 Totals 24 BARK-REMOVAL METHOD Male 54 .49 Female 90 .51 Unidentified^ Th_ — -- 3^ Totals 167 ^ Sex ratios (males to females
. A comparison of radiographic and bark-removal methods for sampling of mountain pine beetle populations. Mountain pine beetle; Sampling. Table 'Number, size, and sex ratio of beetles emerging from areas on the same trees where radiographic and bark-removal sampling were used. Average Standard Number/ Number-^ length deviation 50 .4 cm^ -----OT77----- RADIOGRAPHIC METHOD Male 6 0,62 Female 15 .53 Unidentified^ __3 -- -- .5 Totals 24 BARK-REMOVAL METHOD Male 54 .49 Female 90 .51 Unidentified^ Th_ — -- 3^ Totals 167 ^ Sex ratios (males to females) are 1 in radiographed areas, and 1 in nonradiographed areas. ^ Beetles could not be sexed because of broken abdomens. Figure 2.—Radiographs of good quality can be produced where moisture content of wood and bark is uniform and a filter is used to prevent overexposure of thin 9. 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: ., bo, bookcentury1900, bookcollectionbiodiversity, bookleafnumber17
