Conifer Needle Rusts

PLant Disease
The lifecycle of conifer needle rusts and their association with the Christmas tree industry are discussed by the Oregon State University affiliated authors. A table is provided of the most common needle rusts found in Oregon, the table includes the needle rust's hosts, and alternative hosts.

Progress Report on Phytophthora Ilicis Research--1975

PLant Disease
A report on the progress of research to find a control for Phytophthora illicis in cut holly and holly plants in the field. The results of the two year study suggests a viable control for Phytophthora illicus once it is detected but not for use in prevention of the fungus. The authors discuss their goals for the ongoing research.

Status of the European Shoot Moth in Oregon

Insects
A brief history of the invasive pest European pine shoot moth, Rhyacionia buoliana (Schiff.), in Oregon. Surveyed Oregon counties found to have infestations were; Clackamas, Lane, Marion, Multnomah and Umatilla. Control methods for the moth are discussed along with descriptions of the life cycle and damage caused by the moths.

Pine Shoot Moth Control

Insects
Pesticides were tested over a period of four summers for improved control of European pine shoot moth. The author suggests several methods for predicting the first spray application date as it can vary from year to year.

What about Phytophthoras in the Pacific Northwest?

Disease
Concerns about Phytophthora and it's impact on the Pacific Northwest nursery industry are discussed. The authors offer incite into the disease itself, control methods, phytophthora prevention in propagation, phytophthora prevention in containers and growing beds, prevention of the disease in the field, and future phytophthora research directions.

Mugo Pine Cuttings Rooted in June or January

Breeding and Selection
Over a seven year period Mugo pine (Pinus mugo mughus) was researched by the Department of Horticulture at Oregon State University, the project focused on selection and vegetative propagation of Mugo pine. The results led to anticipation of the release of several cultivars varying in appearance.

Preliminary Report on February-March 1974 Holly Tests

Holly
The disease Phytophthora ilicis in cut holly led to berry and leaf infection and defoliation. Tests were preformed on the cut holly stems by dipping them in solutions and leaving some untreated for comparison. After a suitable solution was found it was tested on several varieties of holly.

Cylindrocladium Disease of Azaleas Studied

Plant Disease

Cylindrocladium scoparium, a wilt disease of azaleas was a major problem for the azalea industry across the country in the mid 1960's. Studies were conducted to determine the cause of the wilt and identify control measures, observations and results are discussed.

35 Years of Specialty Horticultural Research

Nursery Crops
The results of 35 years of horticultural research in nursery and ornamental crops conducted at and in affiliation with Oregon State University are discussed. Topics include; defoliation problems, gladiolus, new crop development, lilies, holly, wood waste utilization, ornamental plant nutrition, graduate research assistance, rose and tree fruit rootstock research, ornamental research, root regeneration, propagation research, and plant growth research.

Entomology Research Programs Aid Industry

Insects
The history and impact of entomology research conducted in affiliation with Oregon State University is discussed by the author. Topics include; holly and camellia scales, gladiolus viruses, holly insects, pear root aphid, symphylans, tent caterpillars, and control of virus spread.

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