Select the Right Gloves to Protect Yourself When Handling Chemicals

Information provided on the importance of glove selection to achieve maximum protection when handling chemicals. Specific glove materials, matching the glove material to the specific chemical being handled, and other considerations for glove and clothing selection are also addressed.

Root Weevils

A discussion about root weevils that attack dozens of ornamental plant species in the Pacific Northwest; the Black Vine Weevil (Otiorhynchus sulcatus), the Strawberry Root Weevil (O. ovatus), and the Obscure Root Weevil (Sciopethes obscurus). Topics included in the discussion are biology, control, application, and nematodes.

Pseudomonus syringae: Disease and Ice Nucleation Activity

Plant Disease
A technical report on what is know and what is not known about Pseudomonas syringae in the nursery industry. Main topics are plant symptoms, severity of the disease, classification of Pseudomonas syringae isolates, sources and survival, hosts, and controls and recommendations.

Some Arborists and Gardeners Begin Itching When Planting or Pruning Certain Ornamental Plants

A discussion about skin injuries caused by certain ornamental plants that occurred during planting or pruning. Causes of skin injuries included in the publication are mechanical injury, pharmacologic injury, primary irritant phytodermatitis, and allergic phytodermatitis.

Sporotrichosis, A Skin Disease Caused by the Fungus Sporotrichum schenckii

Dr. James Green, a horticulture extension specialist affiliated with Oregon State University, discusses the skin disease Sporotrichosis. The disease is caused by the fungus Sporotrichum schenckii and is usually transmitted in sphagnum moss but can also be found in nursery soils, flowers, shrubs, and lumber.

Chemical Growth Regulators

Report on chemical growth regulators for use in greenhouse and nursery crop production. Studies were conducted to determined the effectiveness of the growth regulators on the following crops; zonal geraniums, hibiscus, hydrangea, kalanchoe, weeping fig, several trees species, poinsettias, Easter lilies, and freesia.

Evaluation of Ronstar and a Combination of Methazole and Prodiamine on Container-Grown, Broad-Leaved Evergreen Shrubs

Nursery Crops
Research conducted in affiliation with Oregon state University on herbicide phytotoxicity of Ronstar, Methazole, and Priodiamine. Plants tested included Calluna vulgaris, Cotoneaster congesta, Euonymus fortunei 'Emerald n 'Gold', Ilex crenata 'Green Island' and Ligustrum japonicum.

European Rhododendron Rust

Plant Disease
European rhododendron rust (Chrysomyxa ledi var rhododendri), is a disease which can lead to severe defoliation in rhododendrons and deciduous azaleas. The rust also affects it's alternative host, spruce (Picea sp.) and can cause severe defoliation. Symptoms, disease lifecycle, and control are discussed.

Gladiolus-Postharvest Handling of Gladiolus Corms

Post Harvest
Guide for the prevention and control of Stromatinia, Curvularia, Botrytis, Fusarium corm rot, thrips, nematodes, bulb mites and aster yellows mycoplasm. Information provided on how to cure and store gladiolus corms, dormancy, and Rhizoctonia solani.

Ranking of Trees According to Damage of Sewage Pipes

Nursery Crops
Recommendations for specific tree species to incorporate into landscape settings based on a five-year study involving 460 cases and over 60 woody ornamentals. Tree species were ranked according to how likely the roots were to enter and damage sewage pipes.