College of Agricultural Sciences

A report on Oregon State University affiliated research conducted with the purpose of documenting the chromosome number and genome size of Callicarpa species to add to the available information on the genus.

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 comprehensive guide on P. ramorum. Topics discussed include; morphology, genetics, growth, distinguishing characteristics for identification, disease history, impacts in the forest, forest and wildland hosts and symptoms, and management and educational materials.

The purpose of this article is to report on progress in the development of Phytophthora-ID and the validation of its data sets using an extensive sample of Phytophthora spp. It is expected that Phytophthora-ID will also help in development and maintenance of culture collections.

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.

Oregon State University affiliated author discusses the top 10 tips for preventing disease in nurseries. Specific topics addressed include site selection and drainage, sanitation practices, disease free plant sources, plants in container, and irrigation.

A proposal for a system naming clonal lineages of Phytophthora ramorum, the causal agent of sudden oak death and ramorum blight, based on a consensus established by the P. ramorum research community is discussed.

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.

Researchers investigated the the mechanism by which P. ramorum causes disease symptoms and mortality in tanoak trees. This study sought to determine the spatial and temporal development of tyloses in tanoak infected with P. ramorum, and the relationship between abundance of tyloses and specific conductivity of the xylem.

This study on interspecific hybridization in Tecoma Juss. was conducted to develop novel forms for the nursery industry. The selection of species used in the study included T. garrocha, T. stans, T. guarume, and T. capensis.