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 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.
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 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.
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.
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.
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.
The purpose of this study was to determine the persistence, measured as efficacy against BVW larvae, of M. anisopliae in five (coir, fir bark, hemlock bark, peat moss and perlite) common components of soilless potting media.
OREGON STATE UNIVERSITY
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