Information and strategies for field growers on how to reduce weeds in their crops. Topics discussed include, field preparation, sanitation, cultural practices and proper herbicide selection and use.
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.
Latest Publication available for purchase:
Identifying and Managing Christmas Tree Diseases, Pests, and Other Problems PNW 659
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
Pacific Northwest Christmas Tree Association
National Christmas Tree Association
Soil & Water Conservation Districts
ODA Pitch and Needle Newsletters
Christmas Tree Nutrient Management Guide
Pest Management Strategic Plan for Christmas Trees in Oregon, Washington and Idaho
Growing Christmas Trees in the Pacific Northwest-PNW 6 publication
Buy-Sell Directory and Resource Guide
Information and strategies for field growers on how to reduce weeds in their crops. Topics discussed include, field preparation, sanitation, cultural practices and proper herbicide selection and use.
A comprehensive guide for forest managers, Christmas tree growers, and forest-tree nursery operators in Oregon and Washington on sudden oak death, the disease caused by the recently introduced Phytophthora ramorum.
Very informative and useful publication for nursery management and workers. Discusses the history of Phytophthora ramorum in Oregon and its biology, hosts and symptoms. In depth information on the management and prevention of the pathogen.
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.
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).