Objectives:

• To assess the effects of two different application rates of glyphosate on seedling growth and competing vegetation in the ICHxw.

Experimental Design:

Treatments:

• A  Douglas fir plantation that was 8 to 9 years old was treated.
• Three rates of glyphosate (1.072 and 1.428 kg.ai/ha and a control) were used.
• Target species were ninebark, snowberry and saskatoon.

Layout:

• There are nine plots (20 m by 40 m), with one treatment randomly assigned to each plot for a total of three replicates for each treatment.
• Within each plot, 20 well spaced crop trees were selected for assessment.
• Target species were assessed in crop tree-centred plots (r=1.95 m).

History:

• 1983 Pre-treatment assessment and herbicide application
• 1984 - 1989 Assessments were conducted annually except for 1985
• 1998 Final Report

Status: Dormant

Reports and Publications:

Thompson, C.F., 1988, The effect of glyphosate treatments on a mixed brush community in the ICHd subzone - Progress Report. B.C. Min. For. Unpubl. Rep. Nelson, B.C.

Thompson, C.F. 1988. Glyphosate rate trial for control of ninebark, snowberry and saskatoon on a warm dry site in the southern interior of British Columbia. Expert Committee on Weeds, Abstract.

Thompson, C.F. 1988. The effect of glyphosate treatments on a mixed brush community in the ICHd subzone. A poster presented to Vegetation Competition and Responses, the third annual B.C. Vegetation Management Workshop, Vancouver, B.C., Feb., 1988.

Thompson, C.F. and P. Bauer, 1998. Glyphosate rate trial for conifer release in a shrub community on a warm dry site in the Pend d'Oreille River valley of British Columbia. Final Report submitted to Arrow Forest District, BC Ministry of Forests.

Comments:

This project was established by Chris Thompson. Since his retirement, it has been overseen by Deb Delong.