English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Wood forget-me-not (Myosotis sylvatica Ehrh.: Hoffm., Boraginaceae) cultivars are popular ornamentals in the Pacific Northwest. In western Washington, this species frequently displays symptoms and signs of powdery mildew after anthesis. There are no published records of this disease in Washington. This report records the disease from King, Pierce, Snohomish, and Skagit counties and describes and illustrates symptoms of the disease as well as taxonomically important features of the causal organism that was determined to be Golovinomyces cynoglossi (Wallr.) V. P. Gelyuta. Signs of the disease (Fig. 1) included effuse to dense patches of whiteto grayish-brown mycelia on stems and leaf surfaces that frequently exhibited chlorotic mottling. The fungus formed superficial hyphae with nipple-shaped appressoria (Fig. 2); conidiophore foot cells that were cylindrical and measured (41-) 44.5-54.5 (-67.5) × 9.5-12.5 μm; and conidia (Fig. 3) that formed chains and were ovoid to cylindrical, lacked fibrosin bodies, and measured (21.5-) 22.531 × (10.5-) 12-17 (-20.5) μm. In one of 12 specimens, mature ascocarps were found on plant stems. Chasmothecia were dark brown to black, subspheroidal, 91-120 μm in diameter, with mycelioid appendages, and contained multiple asci that were saccate, short-stipitate, and measured 56.5-65.5 × 33.5-38 μm. Asci typically matured to contain two ovoid, pale yellowish ascospores measuring (19.5-) 20-24.5 × (13-) 14-16 (-17) μm; frequently, additional abortive ascospores were observed (Fig. 4). A voucher specimen was deposited with the Mycological Herbarium of the Department of Plant Pathology at Washington State University.

plant health progress

First Report of Powdery Mildew of Myosotis sylvatica (Wood Forget-me-not) Caused by Golovinomyces cynoglossi (Erysiphe cynoglossi) in Washington State