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.

Weed Assessment Survey for Nursery Production now available online!

This survey will help clarify the current weed management needs of the nursery industry.

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.

Rates for Use of Fungicides and Bactericides in Various Amounts of Water

Growers guide for adjusting fungicide and bactericide rate use amounts in water for foliage plants. Author provides information on rates of use for many different fungicides and bactericides, specifically offering amounts for smaller rates of use.

Identifying Common Root Weevils

The general physical characteristics for identifying common root weevils are discussed along with characteristics for identifying several specific weevil species. Weevils discussed include; Clay-Colored Weevil, Obscure Root Weevil, Rough Strawberry Root Weevil, Strawberry Root Weevil, Small Grass Weevil, Woods Weevil, Woodburn Weevil, Black Vine Weevil.

Quackgrass-A Serious Problem Weed

Quackgrass (Elymus repens L. Gould) is a perennial problem weed of the cooler climates in the Northern Hemisphere. Quackgrass reproduction and spread, competition with crop plants, and quackgrass control methods are addressed in the article.

Oxalis-Biology and Control

Oxalis (Oxalis europaea), known also as Yellow Wood Sorrel, is a persistent weed with characteristic explosive seed dispersal from elongated pods. The University of California affiliated authors emphasize the importance of understanding seed production, dispersal, and germination.

Control of Yellow Nutsedge in Nurseries

Yellow nutsedge (Cyperus esculentus) is a persistent weed, especially in cultivated areas, that grows well in varying habitats with different environmental conditions. Information is provided on the following topics; identification, life cycle, infestation, controls, and year-round management.

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.

Root Weevils: Some Adults Overwintered, Others are Still Emerging

A comprehensive guide for the management of root weevils including the strawberry root weevil (Otiorhynchus ovatus) in greenhouses, nurseries, landscapes and gardens. Topics discussed include root weevil damage, life cycle, hosts, and control.