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.

Greenhouse Pest Alert: Sweetpotato Whitefly

Information provided on detection and identification of the greenhouse pest Sweetpotato whitefly, Bremisia tabaci. Resistance, survey and detection, and distinguishing between the common greenhouse whitefly and the sweetpotato whitefly are discussed.

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.

Controlling Moss in Lawns

Mossy lawns are common in the Pacific Northwest. Two mosses typically found invading Western Oregon lawns are Rhytidiadelphus sp. and Brachythecium albicans. Cultural, mechanical, and chemical control methods are offered as a guide to help control moss in lawns.

Searching for Perfect Turf

Informative look at lawn grass selection, popular grass species, and management practices. Specific grass species discussed includes tall fescue, fine fescue, Kentucky bluegrass, perennial ryegrass, bentgrass, highland bentgrass, colonial bentgrass, Poa trivialis, Poa annua, and Holcus lanatus.

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.

Narcissus-Recommendations for Control of Basal Rot of Daffodils

A discussion about the control of basal rot of daffodils caused by the fungus Fusarium oxysporum F. sp. Narcissi. Topics discussed by the Washington State University affiliated author include basal rot lifecycle, and a series of recommendations on practices used to control basal rot of daffodils.

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.