Understanding Container Moisture

Container media

Researchers at Oregon State University have been studying how soilless substrates can be used together with moisture monitoring equipment to get the best results while reducing the need to irrigate. Topics specifically addressed include soilless substrate and water management.

A Challenge for the New Millennium

Culture

John Lambrinos, assistant professor of horticulture with Oregon State University, discusses how the fields of horticulture and restoration ecology can work together in a mutually beneficial way to improve the environment.

Slime and Punishment

Management

No matter how small, slugs and snails can cause huge headaches for growers. Fortunately, there are many ways these pests can be managed and eliminated. The author discusses the importance of and the different factors involved in a good integrated pest management plan.

Genome Size Estimates and Chromosome Numbers of Callicarpa L. (Lamiaceae)

Breeding

A report on Oregon State University affiliated research conducted with the purpose of documenting the chromosome number and genome size of Callicarpa species to add to the available information on the genus.

Safe Procurement and Production Manual

Nursery crops

A systems approach for the production of healthy nursery stock. The manual, published by the Oregon Association of Nurseries, is divided into 3 main parts. A systems approach introduction, voluntary best practices for your nursery, and the next step: systems approach certification.

Confirmation of hyridity using GISH and determination of 18S rDNA copy number using FISH in interspecific F1 hybrids of Tecoma (Bignoniaceaea)

Breeding

This study on interspecific hybridization in Tecoma Juss. was conducted to develop novel forms for the nursery industry. The selection of species used in the study included T. garrocha, T. stans, T. guarume, and T. capensis.

A Simple Chromosome Doubling Technique is Effective for Three Species of Cupressaceae

breeding

A recent report described a simple technique to double Cryptomeria japonica chromosomes. The objectives of this research was to evaluate the effectiveness of the technique and determine optimal treatment duration for doubling chromosome numbers in oriental arborvitae, american arborvitae, and western red cedar.

An Oryzalin-induced Autoallooctoploid of Hibiscus acetosella 'Panama Red'

breeding

Research was conducted to take advantage of the reduction in plant size and vigor often associated with induced polyploidy. The principle objectives were to induce polyploidy in seedlings from H. acetosella ‘Panama Red’ and to evaluate the effects on growth, morphology, and fecundity.

Oryzalin-induced Tetraploidy in Crytomeria japonica (Cupressaceae)

Breeding

Japanese-cedar (Crytomeria japonica) performs well under a range of soil and environmental conditions but has been underused in landscapes, in part, due to winter browning. In previous studies, chance seedlings that did not exhibit winter browning were identified as tetraploids. This study was conducted to induce polyploidy in Crytomeria japonica.

Sulfuric Acid Scarification of Callicarpa americana L. (Lamiaceae) Seeds Improves Germination

Propagation

An experiment was performed to determine a more effective protocol for germinating C. americana seeds. It was hypothesized that scarification with sulfuric acid would aid in breaking seedcoat dormancy, thereby resulting in more rapid and uniform germination.

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