Root Culturing in Bareroot Nurseries

Nursery Crops
Information provided on the bareroot nursery practice of root culturing. Root culturing is defined by the author as a general term for nursery cultural practices designed to modify root growth or morphology while the seedling is still in the nursery bed.

Hearing date set for possible expansion of the Sudden Oak Death (SOD) quarantine area in Southern Oregon.

A hearing is scheduled to discuss proposed changes to the quarantine area and allow use of an oak from disease free area.

Factors to Consider Before Tank Mixing Pesticides

The dangers of tank mixing pesticides are addressed by the University of California affiliated author. The factors discussed include; chemical incompatibilities, physical incompatibilities, general principles for mixing pesticides, specific mixtures to avoid, and causes of phytotoxicity.

Transmission and Control of Plant Diseases in Propagules

Plant propagation
A discussion about propagation and the transmission and control of plant diseases. The topics addressed in relation to propagation and plant disease include; significance of propagule transmission, control procedures, bulbs and corms, and seeds.

Container Soils are Different

Container Media
A discussion of the differences between container media and ground bed media in regard to water availability for plant growth. Also addressed is "the container effect", differences in soil texture, the importance of the appropriate amount of aeration, and the affects of aeration on plant growth.

Examine Clematis Roots for Nematode Infestation

Greenhouse Crops
Control of nematodes in clematis was researched in this Oregon State University affiliated study. Root rot nematode, Meloidogyne hapla, one of the most devastating pests of the flowering clematis is discussed specifically by the author.

Evaluation of Miticides for Effective Control of Spruce Spider Mite

An in depth look at the spruce spider mite, Oligonychus ununguis (Jacobi). Complete information including host range, identification, life cycle, monitoring and control measures are discussed. Chemical control measures such as miticides and horticultural oils are reviewed.

Weed Alert and Herbicide Update

A review of preemergence herbicides used to control annual and perennial grasses, mainly in conifer plantings. Discussion of effectiveness, crop tolerance and postemergence activity is covered. Includes an overview of chemicals used at time of publication.

Irrigation Practices: Measuring Sprinkler System Application Uniformity

A useful resource for nursery professionals to help guide them through the process of checking their overhead irrigation systems uniformity.

Weed Control In 1-0 Conifers Seedbeds With Sethoxydim (Poast) Spot Treatments.

A brief summary of a research project which evaluates the herbicide Sethoxydim (Poast) for grass weed control and phytotoxicity in conifer seedling beds. Three conifer species, Abies procera (noble fir), Pinus sylvestri s (Scotch pine), and Psuedotsuga menziesii (Douglas-fir) were used.