Fertilization of Nordmann and Noble fir

Christmas Tree
Field trials testing the effects of fertilization on Nordmann and Noble fir trees in relation to the Christmas tree industry, the results of the trials and the implications for growers are discussed.

Minute Nursery Trees, a Break-Though for the Tropics?

Rootstocks
A method for producing 'mini-trees' for commercial production in the nursery environment. The author discusses how the 'mini-trees' are produced, packing and transport, second-stage nursery and field establishment, the scope for mini-trees in the tropics, and a project proposal.

Grass in the Nursery?

Management
A discussion about the use of grass in between rhododendron field plantings in the nursery environment for weed suppression, improved water drainage, and mud control. The types of grass covered include; perennial ryegrass, tall fescue, red fescue, hard fescue, chewings fescue, colonial bentgrass, kentucky bluegrass, and annual bluegrass.

Phenyl-IBA as a Root-Inducing Agent for the Propagation of Cuttings

Propagation
Research was conducted on the effectiveness of using P-IBA as a rooting-inducing agent for the propagation of cuttings. Cuttings of two rhododendron cultivars, 'Ramapo' and 'Roseum elegans' were used in the experiments, the methods and results are discussed.

Pseudomonas Syringae Damage Increasing in Some Nursery-Grown Shade Trees

Plant Disease
Increased damage by Pseudomonas syringae, a bacterial disease, was noticed on a variety of nursery-grown shade trees. Research was conducted to determine how the bacterium was spreading, conditions encouraging infection, and possible control methods.

'Autumn Blaze' - New Callery Pear Introduction from Oregon State University

Breeding and Selection
Callery pear (Pyrus calleryana) cultivars are the subject discussed after the introduction of a new cultivar, 'Autumn Blaze', to the nursery industry. The characteristics of 'Autumn Blaze' are addressed along with information regarding other Pyrus calleryana cultivars.

The Chemical Basis for Resistance of Certain Rhododendron Cultivars to Foliar Feeding by Root Weevils

Breeding and Selection
Studies were conducted to determine if there was foliar feeding resistance to root weevils in certain rhododendron cultivars. The results, suggesting the lepidote branch had more resistant cultivars than the azalea branch, are thoroughly discussed by the author.

Apple Maggot (Rhagoletis pomonella)

Insects
The apple maggot was detected on a homeowner's tree in the Portland, OR area in the late summer of 1979 and was again detected on other noncommercial plantings the following year. Apple maggot hosts, damage, detection and control are addressed by the author.

Germination Requirements for Acer Macrophyllum, Bigleaf Maple

Propagation
As the use of native plants in landscaping became more popular, the authors recognized the need for more information on the collection, handling, and cultural requirements the plants. The discussion focuses on the information collected regarding the Bigleaf Maple.

Follow Up on Mugo-Pine Cultivars Released by OSU in 1976

Breeding and Selection
A brief description of each of the six dwarf mugo-pines, Pinus mugo mughus, released to licensed nurserymen after years of research and cultivar selection. The author was looking for responses to a series of questions he had regarding the six mugo-pine cultivars.

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