Ref ID: 8945
Ref Type: Journal
Authors: Alzamora, R. M., Apiolaza, L. A., and Ide, S.
Pub Date: 2002
Journal Name: Bosque
Volume: 23
Issue: 1
Start Page: 88
End Page: 96
ISBN/ISSN: 0304-8799
Keywords: analysis/Chile/commercial/damage/defect/diameter/differential/economics/entomology/evaluation/growth/height/impact/index/indices/influence/information/insect/loss/methodology/model/moth/optimal/Pinus/Pinus radiata/plantation/plantations/region/Rhyacionia buoliana/rotation/site/site index/stand/stem/study/value/volume/yield
Abstract: The study presents a physical and economic evaluation of commercial volume losses due to the attack of Rhyacionia buoliana (Shiff) on Pinus radiata (D.Don) plantations in the IX and X regions of Chile. The economic impact of the insect on the optimal rotation of stands is evaluated using the Land Expectation Value criterion. Different conditions of damage are related to stem defects caused by the insect. Three plantation ages and two site indices are considered with information about diameter, total height and defect height. Volume yields were projected with (one or more defects below commercial height of the stem) and without (no defects due to the moth) damage. This methodology allows representing the impacts of the defects as commercial volume differential. Yield projections were made with silvicultural regimes commonly used in private industrial plantations. The results are presented in three categories. First, a statistical analysis to determine the influence of site index, the age of the plantation and the region on total height, frequency and type of defects. Second, calculation of volume differentials between a healthy plantation and one with R. buoliana damage. Finally, the economic impact of the moth is determined by comparing the Land Expectation Values.
Notes: Entered by uncronopio (19/6/2001):
Reprint: Not in File
Program: SPF Genetic Improvement
Project: A2
Deliverable:
Confidentiality: Public
Availability: Authors
Report: Annual Report 2001/2; Annual Report 2002/3
Type: Article
Address: luis.apiolaza@utas.edu.au