Gary Chastagner

Distinct terpene metabolite blends serve as core drivers of consumer aroma preferences in fir Christmas tree species

Angela Chiang, Katlyn Nau, Gary Chastagner, Chal G. Landgren et autres

Real Christmas trees contribute ~$2.5 billion to the US economy annually. True fir (Abies spp.) are the most popular trees and account for the majority of sales. The real Christmas tree commodity board identified aroma as the primary driver for consumers to …

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Distinct terpene metabolite blends serve as core drivers of consumer aroma preferences in fir Christmas tree species

Angela Chiang, Katlyn Nau, Gary Chastagner, Chal G. Landgren et autres

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Field Assessment of Turkish Fir (Abies bornmuelleriana) Resistance to Five Root-Rotting Phytophthora Species

Jeremy S. Johnson, Gary Chastagner

Turkish fir (Abies bornmuelleriana) has been evaluated as a Phytophthora root rot (PRR)–resistant alternative to other PRR-susceptible Abies Christmas tree species. Although Turkish fir survival under heavy PRR disease pressure exceeds that of other host species, previous research has suggested that there …

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Insecticide efficacy and emergence timing of the Douglas-fir twig weevil

Thomas D. Whitney, Gary Chastagner

The Douglas-fir twig weevil (Cylindrocopturus furnissi Buchanan) (Coleoptera: Curculionidae) has recently emerged as a significant pest of Christmas trees grown in the Pacific Northwest United States. The larvae girdle and disfigure twigs, which adversely affects tree marketability. Trees produced for export are …

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Cryptostroma corticale , the causal agent of sooty bark disease of maple, appears widespread in western Washington State, USA

Rachel K. Brooks, Daniel Omdal, S. Brown, Collin J. Marshall et autres

Abstract The recent emergence of the fungus Cryptostroma corticale in Seattle, Washington, USA is concerning because of its invasive status in Europe, where it causes sooty bark disease of maples (SBD), killing both forest and urban trees. Additionally, the fruiting bodies (stromata) …

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Author response for "Cryptostroma corticale, the causal agent of sooty bark disease of maple, appears widespread in western Washington State, USA "

Rachel K. Brooks, Daniel Omdal, S. Brown, Collin J. Marshall et autres

Citizen science can add value to Phytophthora monitoring: five case studies from western North America

Kara K. Lanning, Norma Kline, Marianne Elliott, Elizabeth Stamm et autres

Phytophthora species are plant pathogens responsible for many notable biological invasions in agricultural, forests, and natural ecosystems. Detection and monitoring for invasive introductions of Phytophthora spp. is time and resource intensive. Development of citizen science detection and monitoring programs can aid in …

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Author response for "Cryptostroma corticale, the causal agent of sooty bark disease of maple, appears widespread in western Washington State, USA "

Rachel K. Brooks, Daniel Omdal, S. Brown, Collin J. Marshall et autres

Physical characteristics of soil-biodegradable and nonbiodegradable plastic mulches impact conidial splash dispersal of Botrytis cinerea

Xuechun Wang, Chakradhar Mattupalli, Gary Chastagner, Lydia S. Tymon et autres

Botrytis cinerea causes gray mold disease of strawberry (Fragaria ×ananassa) and is a globally important pathogen that causes fruit rot both in the field and after harvest. Commercial strawberry production involves the use of plastic mulches made from non-degradable polyethylene (PE), with …

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Detection and Molecular Phylogenetic-Morphometric Characterization of Rhizoctonia tuliparum, Causal Agent of Gray Bulb Rot of Tulips and Bulbous Iris

Katie Coats, Annie DeBauw, Dilip K. Lakshman, Daniel P. Roberts et autres

Gray bulb rot of tulips and bulbous iris is caused by the soil-borne fungal pathogen, Rhizoctonia tuliparum (Rtul). Sclerotia present in infected bulbs, as well as overwintering sclerotia in soil and field debris, are the primary sources of infection. A method for …

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Using differences in abiotic factors between seed origin and common garden sites to predict performance of Pacific madrone (Arbutus menziesii Pursh)

Renata Poulton‐Kamakura, Laura E. DeWald, Richard A. Sniezko, Marianne Elliott et autres

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First Report of Leaf Blight Caused by Phytophthora ramorum on Periwinkle (Vinca minor) in Washington State, U.S.A.

Marianne Elliott, Lucy Rollins, Tyler B. Bourret, Gary Chastagner

Phytophthora ramorum (Werres, De Cock & Man in't Veld) was recovered from symptomatic foliage of periwinkle at a botanical garden in WA in March 2015. Symptoms were tan colored lesions with a dark brown margin visible on both surfaces of the leaf …

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