Preliminary Report on February-March 1974 Holly Tests

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.

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.

Cone Formation Reduced in Arborvitae

Nursery Crops
After it was notice that Arborvitae (Thuja occidentalis) produced sparse, yellow-green foliage during years of heavy cone production, trials were conducted. The Oregon State University affiliated trials focused on cone prevention with the use of two different treatments.

Short Days Hasten Easter Lily Flowering

Conditions and cultural practices to prevent "summer sprout" in 'Ace', 'Croft', and 'Nellie White' Easter lilies was the basis of two Easter lilies studies. Details and results of the experiments are discussed with the hope of conducting future research based on the results found.

Length of Old Home Interstem Makes Little Growth Difference

Nursery Crops
The dwarfing pear quince, Cydonia oblonga, was commonly used as rootstock but had compatibility problems resulting in some varieties requiring an interstock. A plot was established in Corvallis, OR in 1965 to determine the importance of interstem length in pear trees.

New Lily Deflowering Treatment Shows Promise

A report on the effectiveness of different treatments used to deflower 'Ace' and 'Nellie White' Easter lilies, tested in the 1971 growing season. Along with deflowering, observations were also made on foliar damage, plant height, and final bulb weight.

Horticultural Crops Research Needed for the 1970's

Nursery Crops
Based on a previous article calling for research in the ornamental crops industry in Oregon, the authors elaborate on what ornamental and horticultural areas need more research. Specific crops are listed along with the most pertinent areas for each crop needing more research.

Pea Pears Show Ornamental Value

Nursery Crops
Pea pears capture the interest of the author for their use in ornamental horticulture. The pea pear was especially attractive because the pears stayed on the tree and display a variety of fall foliage coloration. Descriptions of various varieties of pear tree size, foliage color, bloom time and other ornamental factors are provided.

Lily Bulb Maturity, Dormancy Studied

The influence of lily bulb maturity, temperature, and long day treatments on flowering was researched in this Oregon State University affiliated project. The three cultivars of Easter lilies tested were; 'Ace', 'Croft', and 'Nellie White'.

Virus-Free Rose Clones Under Test

Nursery Crops
Development of virus free rose cultivars took place at the Oregon Agricultural Experiment Station in cooperation with California Agricultural Experiment Station and California Department of Agriculture. Information provided on how viruses are spread in roses and details of the study.