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Christmas Tree Resources at Oregon State University
The Christmas Tree program at OSU receives valuable assistance from crop specialists and Extension agents from a number of disciplines and locations across OSU. Recent retirements and position changes have thinned these ranks beginning in 2012. This type of web resource will likely become a prime source of information in trying to maximize scarce time and budgets.
Chal Landgren is the OSU Extension Christmas Tree Specialist for Oregon. His program covers information from site preparation through harvest. Current extension and research efforts include sustainability certification, tree selection/breeding and fertilization.
IPM in Christmas Trees Workshop Materials
IPM-A conceptual and practical overview, Paul Jepson-OSU
IPM and Pesticides, Bruce Alber-Wilbur Ellis
Developing a treatment plan, Chal Landgren-NWREC-OSU
Identifying Root Rot in Conifers, Kathleen M. McKeever-WSU Puyallup Research & Extension Center
Associations and Organizations:
Production and Management:
Growing Christmas Trees in the Pacific Northwest-PNW 6 publication
Industry Statistics and Regulations:
Christmas tree specialist, Chal Landgren, gives an update of shipping and exporting issues, disease and pest management and current resources for growers.
A report on a current marketing outreach campaign which partners Christmas tree growers in Oregon and Washington with Oregon State University extension agents to promote real Christmas trees in major consumer markets.
Researchers report on a study conducted to test the efficacy of soil additives in promoting plant growth and reducing mortality. The species included in the trial were Hydrangea macrophylla ‘Endless Summer’, Berberis thunbergii ‘Rose Glow’, and noble fir (Abies procera).
A discussion about live plant imports as an important invasion pathway for non-native plant pests. The authors discuss the effect of current regulation, the need for updated regulation, and the recent and proposed changes to plant import regulation.
A systems approach for the production of healthy nursery stock. The manual, published by the Oregon Association of Nurseries, is divided into 3 main parts. A systems approach introduction, voluntary best practices for your nursery, and the next step: systems approach certification.
The Effects of Methyl Bromide Alternatives on Soil and Seedling Pathogen Populations, Weeds, and Seedling Morphology in Oregon and Washington Forest Nurseries
Fumigation treatments (a conventional methyl bromide – chloropicrin application and reduced-rate alternative fumigant treatments) and a nonfumigated treatment were evaluated at forest nurseries in Oregon and Washington for their effects on soil pathogen populations, weeds, and seedling morphology.
Influence of Isolation Method on Recovery of Pythium Species From Forest Nursery Soils in Oregon and Washington
In an attempt to identify Pythium species (common dampening off pathogens) associated with forest nursery soils, field surveys were conducted at three forest nurseries (two in Oregon and one in Washington) in 2008 using three isolation methods.
Research was conducted at Oregon State University North Willamette Research and Extension Center with the objective of determining whether the addition of foliar fertilization would benefit a Christmas tree plantation or container-grown conifer operation.
Final report on research project comparing different methods of fertilization of field grown conifers and also containerized conifers. Study covers methods used, products tested and results obtained.
A helpful publication for anyone considering growing Noble Fir Christmas trees or for current growers. Covers cost of production and provides necessary tools for financial management and decision making.