Red Leaf Spotting in Holly May be Boron Deficiency

Holly
Greenhouse studies and field surveys were conducted in Oregon in an effort to identify what was causing red leaf spotting in holly production in the Pacific Northwest. The field surveys were conducted in 1960 and 1961 at multiple holly orchards in several different Oregon counties.

Boron Deficiency Diagnosed in OSU Carnations

Fertilizer
After observing the yellowing and dying of carnation stem tips in the Portland, OR and Corvallis, OR research was conducted on the William Sim carnation to find out the cause of the growth issues. The results of the study indicated a possible boron deficiency and are discussed by the author.

Late Lily-Bulb Digging Increases Number of Flowers

Bulbs
Research was conducted on Croft Lily bulbs and the influence the digging date had on the number of flowers produced. The author discusses the assumptions made by the industry about Croft lily bulb production in that time period in relation to the results of the research.

Supplemental Light Tested for English Holly Cuttings

Holly
Oregon State University affiliated studies were conducted after a report was released about using night interruption with incandescent lighting on holly cuttings. The results from the Oregon study were found to differ from the results of the USDA report released out of Maryland State College.

Boron Increases Rooting of Holly Cuttings

Holly
Experiments were conducted on holly cuttings over a three year period in this Oregon State University affiliated study. The methods and results of the experiments are discussed by the author.

New Controls Tested With Powdery Mildew

Plant Disease
The effectiveness of various treatments for control of powdery mildew was tested on 360 rose plants. The three varieties of roses used in the study were chosen because of their susceptibility to powdery mildew.

Rose Rootstock Important in Nursery and Garden

Nursery Crops
Rose rootstock and scions were researched in this Oregon State University affiliated study. The tests were conducted to determine the importance of rootstock in the nursery and garden.

New Insecticides Control Soft Scale

Insects
Several different insecticides were tested for control of soft scale on holly and camellia over a five year period. Brown soft scale (Coccus hesperidum) and cottony camellia scale (Pulvinaria floceifera) were the two most common soft scale pests of holly and camellia when the study was done.

Nursery Buying Habits Surveyed

Nursery
The results of a 1958 marketing survey to determine the nursery buying habits of homeowners in the Portland, OR area. The survey included questions about the influence of home value, age, length of residence, and family income on buying habits.

Thimet "Looks Good" as Lily Pest Control

Bulbs
Studies on Croft lily bulbs treated with Thimet examined the insecticides effectiveness as a control against nematodes, aphids and fungus. The study also looked at the effect Thimet had on plant growth when forcing Croft lilies.

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