Research Branch

See below to download.

A Trial of Push-falling to Reduce Phellinus weirii Infection of Coastal Douglas-fir

Author(s) or contact(s): R.N. Sturrock, E.J. Phillips, and R.G. Fraser
Source: Research Branch
Subject: Root Disease
Series: FRDA Report
Other details:  Published 1994. Hardcopy is available.


Push-fall harvesting (or "push-falling") was conducted in coastal British Columbia and evaluated as a strategy for reducing Phellinus weirii infection (laminated root disease) of second-growth, coastal Douglas-fir (Pseudotsuga menziesii). All seven activities comprising the push-falling operation (move, push, shake, grub, brush, deck, and delay) were documented in a video. The productivity of the push-falling operation was measured by detailed timing with stop watches and by shift level monitoring. The greatest proportion of time (24 .6%) was taken by shaking soil from root masses of push-felled trees, followed by moving between treaties rate (18.5%), and grubbing for roots (17.7%). The estimated cost of the push-falling operation on this coastal site was $11.84/m3, including the removal of most diseased stump roots. This cost is comparable to costs for conventional harvesting alone.

FRDA Research Report 217 (2134 KB)

To view this document you need the current version of
Adobe Acrobat Reader, available free from the Adobe Web Site.

Updated July 24, 2015