. Hazard-rating systems in forest insect pest management : symposium proceedings, Athens, Georgia, July 31-August 1, 1980. Forest insects Biological control United States Congresses; Forest insects United States Analysis; Forest insects United States Management. CO 2 CO U. O 5* Uj CO Qc Uj Q. Uj -J I 100 90 80 70 60 50 40 30 20 10 0 4a 4b ^ $14 0 10 20 30 40 50 TIMBER VALUE LOSS PER ACRE (DOLLARS) RATING STAND VULNERABILITY Gansner et al. (1978) and Gansner and Herrick (1979) used two multiple vari- able techniques, stepwise regression and automatic interaction detection (AID), to develop
. Hazard-rating systems in forest insect pest management : symposium proceedings, Athens, Georgia, July 31-August 1, 1980. Forest insects Biological control United States Congresses; Forest insects United States Analysis; Forest insects United States Management. CO 2 CO U. O 5* Uj CO Qc Uj Q. Uj -J I 100 90 80 70 60 50 40 30 20 10 0 4a 4b ^ $14 0 10 20 30 40 50 TIMBER VALUE LOSS PER ACRE (DOLLARS) RATING STAND VULNERABILITY Gansner et al. (1978) and Gansner and Herrick (1979) used two multiple vari- able techniques, stepwise regression and automatic interaction detection (AID), to develop guides for predicting stand vul- nerability. Underlying the development of these models is the premise that tree mortality caused by the gypsy moth in any 100 CO Q 90 5 CO 80 u. 70 o 60 Uj Cj 50 QC Ui <X 40 30 -J 20 10 CJ 0 \ AV =12 PERCENT 0 50 10 20 30 40 PERCENT OF ORIGINAL TIMBER VALUE IN STAND Figure 3a-4b.—Forest losses in gypsy moth- infested stands in the Poconos, 1972- 76. particular forest stand is related to and can therefore be expressed as a function of selected characteristics of that stand's condition. We selected for analysis variables of forest stand condition thought to be good predictors of tree losses. These variables are measures of 161. 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 United States. Forest Service; Society of American Foresters. Entomology Working Group. [Washington, D. C. ?] : U. S. Dept of Agriculture, Forest Service, [1981]
Size: 2172px × 1151px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorunitedstatesforestservice, bookcentury1900, bookcollec
