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.

Short Days Hasten Easter Lily Flowering

Bulbs
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.

New Lily Deflowering Treatment Shows Promise

Bulbs
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.

Research Needs Discussed for Expanding Ornamentals Industry

Nursery Crops
The future of research and extension work in the ornamental industry at Oregon State University is discussed by the author. Research and extension staff worked to identify areas in need of research and established priorities with in those areas.

Garden, Easter Lilies Infected by Viruses

Plant Disease
Prevention and control of viruses affecting garden and Easter lilies were studied in Oregon by the Oregon State University affiliated author. Specific viruses are discussed in regard to characteristics of the virus, descriptions of size, and affected lily cultivars.

Early Defoliation May Harm Plants

Plant Stress
An experiment was conducted by the author on red-oiser dogwood plants to determine the importance of early defoliation. Leaf removal and its role in dormancy and cold hardiness are explained by the author in an effort to clarify the effect of early defoliation on plants.

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