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.

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.

Rhododendron Leaf Spot and Stem Dieback Caused by Phytophthora syringae

Plant Disease
Research conducted by Dr. R. G. Linderman on rhododendron leaf spot and stem die back determined both to be caused by Phytophthora syringae. Details about the effects and lifecycle of the fungus and possible control methods are provided.

Effects of Raised and Ground-Level Beds and Pine Bark on Survival of Azalea and Population Dynamics of Phytophthora innamomi.

Nursery Crops
North Carolina State University affiliated authors conducted a study to investigate the effects of planting azalea in raised and ground-level beds and pine bark. The study examined the survival rate of the plants and the population levels of Phytophthora innamomi.

Western Flower Trips - An Industry-Wide Problem

Greenhouse Crops
Information regarding common thrips species including; the western flower thrips (Frankliniella occidentalis), eastern flower thrips (Frankliniella tritici), onion thrips (Thrips tabaci), gladiolus thrips (Taeniothrips simplex), and the greenhouse thrips (Heliothrips haemorrhoidalis). Additional information is provided on transmitted viruses, life cycle, detection/ monitoring, and control methods.

Overview of Commercial Production of Cut English Holly (Ilex aquifolium) in the Pacific Northwest

Oregon State University affiliated author offers an overview of commercial production of cut English holly in the Pacific Northwest. Topics include production statistics, marketing, culture, insect and pathogen problems, berry production, and post-harvest care.

Necrotic Ringspot on Bluegrass Turf

Plant Disease
Research conducted at Washington State University's Western Research and Extension Center identified the cause of "necrotic ringspot" on bluegrass turf to be the fungus Leptosphaeria korrae. The authors discuss the signs and symptoms of the disease along with control methods.

Grovesiella Abieticola - Associated With a Canker Disease of True Firs

Grovesiella canker caused by the fungus Grovesiella abieticola was known to infect True fir in Northern California and B.C. Canada but was discovered on Noble fir Christmas tree farms in Western Oregon and Washington in the mid-1980's. Descriptions of the fungus and control methods are included in the article.

Swiss Needle Cast of Douglas-Fir

Plant Disease
Swiss needle cast (Phaeocryptopus gaumanni) is a fungal disease of Douglas-fir trees, native to the North American pacific coast, which causes needle and color loss. Topics discussed include, winter-spring symptoms, summer-fall symptoms, and control.

Botrytis Cinerea

Plant Disease
Botrytis blight ( Botrytis cinerea), also known as grey mold, is one of the common diseases of greenhouse crops. Descriptions of general symptoms and symptoms on flowers, leaves, seedlings, and stems are provided along with cultural and chemical management programs.