A ground-survey method for estimating loss caused by Phellinus weirii root rot. I. Development of survey design / W.J. Bloomberg, P.M. Cumberbirch and G. W Wallis. : Fo29-5/3E-PDF
"A transect line sampling system comprising sets (grids) of Iines was developed to estimate the incidence, distribution and area of root rot caused by Phellinus weirii (Murr.) Gilbertson in Douglas-fir stands. Estimates of total area of root rot were derived from intersection length and probability of occurrence; the latter was also used to estimate area and number of infection centers by size class. In simulated stands, two methods of measuring infection centers, radial and linear, gave accuracies of 96-109 and 94-114% of true area, respectively"--Summary, page 2.
Permanent link to this Catalogue record:
publications.gc.ca/pub?id=9.870423&sl=0
| Department/Agency | Canada. Environment Canada. Canadian Forestry Service. Pacific Forest Research Centre. |
|---|---|
| Title | A ground-survey method for estimating loss caused by Phellinus weirii root rot. I. Development of survey design / W.J. Bloomberg, P.M. Cumberbirch and G. W Wallis. |
| Variant title | Development of survey design |
| Series title | [Report] ; BC-R-3 |
| Publication type | Series - View Master Record |
| Language | [English] |
| Format | Electronic |
| Electronic document | |
| Note(s) | Cover title. Includes bibliographical references (page 14). Includes summary in French. |
| Publishing information | Victoria, B.C. : Environment Canada, Canadian Forestry Service, Pacific Forest Research Centre, March 1980. |
| Author / Contributor | Bloomberg, W. J., author. Cumberbirch, Peter Mark, 1948- author. Wallis, G. W., author. |
| Description | 1 online resource (24 pages) : illustrations. |
| Catalogue number |
|
| Subject terms | Trees Plant diseases Surveys |