What Went Wrong? Problems With Athletic Fields

A thorough discussion involving athletic fields and associated problems. The Oregon State University affiliated author addresses the common problem of field use and drainage in an athletic field. Possible causes of drainage problems, explanations, and solutions are provided.

Cultural Practices for the Management of Plant Parasitic Nematodes

Information provided on cultural pest management practices for control of plant parasitic nematodes in the nursery industry. The main topics of discussion include; nematode identification, crop rotation, fallowing, weed control, resistant plant material, soil amendments, and sanitation.

Update on Tomato Spotted Wilt Virus

Greenhouse Crops
Increasing number of reports of greenhouse crops displaying symptoms of tomato spotted wilt virus (TSWV) prompted the authors to address the issue. Topics discussed are; the history of TSWV in the US, the wide variety of ornamental and non-ornamental hosts, symptoms, and control.

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.

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.

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.

When Air Temperatures Exceeded 90ºF...

Research conducted on growth and flower bud formation of three rhododendron cultivars grown with and without overhead irrigation. Authors were interested in determining the role of overhead irrigation and adequate soil moisture in preventing sunburned foliage.

Botrytis Develops Resistance to Fungicide Used in Bulb Crops

Plant Disease
Study conducted in response to reports from growers of bulb crops indicated a loss of Botrytis control with the fungicides Benlate and Chipco-26019 in both greenhouse and field-grown situations. The authors discuss the results, fungicide resistance and how to avoid fungicide resistance.