First Report of Powdery Mildew of Ligustrum japonicum (Japanese Privet) Caused by Microsphaera syringae (Erysiphe syringae) in North America

Powdery mildew was collected from Japanese privet (Ligustrum japonicum Thunb.) in Seattle, King County, WA. The authors determined the causal agent to be Microsphaera syringae (Schw.) Magn. This report documents for the first time the occurrence of M. syringae on L. japonicum in North America, and presents information on the taxonomy and identification of this fungus. Accepted for publication 6 November 2003. Published 10 December 2003.

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First Report of Powdery Mildew on Caragana arborescens in Minnesota and North Dakota Caused by Microsphaera (Erysiphe) palczewskii

Plant Health Progress ◽

10.1094/php-2006-0117-01-br ◽

2006 ◽

Vol 7 (1) ◽

pp. 59

Author(s):

Dean A. Glawe ◽

Robert W. Stack ◽

James A. Walla

Keyword(s):

North America ◽

Powdery Mildew ◽

North Dakota ◽

Rocky Mountains ◽

Causal Agent ◽

First Report ◽

Powdery Mildew Disease ◽

Caragana Arborescens ◽

First Time

In North Dakota and Minnesota, the authors encountered a powdery mildew disease of Caragana arborescens Lam. (Siberian pea tree) previously unreported from these states. The causal agent was determined to be Microsphaera palczewskii Jacz. This report documents for the first time the presence of M. palczewskii in North America east of the Rocky Mountains and includes information on the morphology, classification, and distribution of this species. Accepted for publication 4 January 2006. Published 17 January 2006.

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First Report of Powdery Mildew on Dipsacus sylvestris Caused by Sphaerotheca dipsacearum in North America

Plant Health Progress ◽

10.1094/php-2006-0607-02-br ◽

2006 ◽

Vol 7 (1) ◽

pp. 54

Author(s):

Frank M. Dugan ◽

Dean A. Glawe

Keyword(s):

North America ◽

Powdery Mildew ◽

Causal Agent ◽

European Species ◽

First Report ◽

Dipsacus Sylvestris ◽

Noxious Weed

Common teasel (Dipsacus sylvestris) is a European species introduced into North America, and is now widely established and regarded as a noxious weed. In October 2005, a powdery mildew was observed on D. sylvestris in two locations in Pullman, Whitman Co., WA. Examination of diseased material confirmed that the causal agent was S. dipsacearum. This report provides the first documentation of S. dipsacearum on D. sylvestris in North America. Accepted for publication 20 April 2006. Published 7 June 2006.

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First Report of Powdery Mildew of Mahonia aquifolium Caused by Microsphaera berberidis (Erysiphe berberidis) in North America

Plant Health Progress ◽

10.1094/php-2003-0206-01-hn ◽

2003 ◽

Vol 4 (1) ◽

pp. 41

Author(s):

Dean A. Glawe

Keyword(s):

North America ◽

Powdery Mildew ◽

Pacific Northwest ◽

First Report ◽

Mahonia Aquifolium ◽

First Time ◽

Grown Plant

Mahonia aquifolium is a widely-grown plant in the coastal Pacific Northwest. This report documents for the first time a powdery mildew on M. aquifolium in North America caused by a fungus fitting the description of Microsphaera berberidis. Accepted for publication 14 January 2003. Published 6 February 2003.

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First Report of Powdery Mildew of Akebia quinata Caused by Microsphaera akebiae (Erysiphe akebiae) in North America

Plant Health Progress ◽

10.1094/php-2004-0316-01-hn ◽

2004 ◽

Vol 5 (1) ◽

pp. 24

Author(s):

Dean A. Glawe ◽

Jenny R. Glass

Keyword(s):

North America ◽

Powdery Mildew ◽

First Report ◽

Western Washington ◽

First Time

Akebia quinata (chocolate-vine, five-leaf akebia) is grown as a perennial ornamental vine in North America. Five collections were made from A. quinata plants in western Washington with symptoms of powdery mildew caused by Microsphaera akebiae Sawada. This report documents the presence of this fungus in North America for the first time, describes and illustrates this fungus and the disease it causes, and reviews the taxonomy and identification of the fungus. Accepted for publication 24 February 2004. Published 16 March 2004.

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First Report of Powdery Mildew of Magnolia Caused by Microsphaera magnifica (Erysiphe magnifica) in the Pacific Northwest

Plant Health Progress ◽

10.1094/php-2003-0512-02-hn ◽

2003 ◽

Vol 4 (1) ◽

pp. 37

Author(s):

Dean A. Glawe

Keyword(s):

United States ◽

North America ◽

Powdery Mildew ◽

Pacific Northwest ◽

Western United States ◽

First Report ◽

Landscape Plant ◽

First Finding ◽

The Pacific ◽

First Time

Magnolia liliiflora Desrousseaux in Lamarck (orthographic variant: M. liliiflora), a species thought to have originated in China (3), is used as a landscape plant in North America. In August 2002, Microsphaera magnifica U. Braun was collected from three plants of M. liliiflora in the Magnolia collection at the Washington Park Arboretum, University of Washington, Seattle. This report documents for the first time a powdery mildew disease of a Magnolia species in the Pacific Northwest, and the first finding of M. magnifica in the western United States. Accepted for publication 14 April 2003. Published 12 May 2003.

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First Report of Powdery Mildew of Poison-Hemlock Caused by Erysiphe heraclei in North America

Plant Health Progress ◽

10.1094/php-2009-0312-01-br ◽

2009 ◽

Vol 10 (1) ◽

pp. 48 ◽

Cited By ~ 1

Author(s):

Steven T. Koike ◽

Dean A. Glawe

Keyword(s):

North America ◽

Powdery Mildew ◽

Causal Agent ◽

Piperidine Alkaloids ◽

First Report

Poison-hemlock is a widely distributed biennial especially known for its toxic piperidine alkaloids that can poison livestock that eat this plant. In 2008, a powdery mildew was observed on poison-hemlock growing in coastal California. The causal agent was determined to be Erysiphe heraclei DC., previously unreported on this host in North America. Accepted for publication 18 December 2008. Published 12 March 2009.

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First Report of Powdery Mildew of Scabiosa columbaria (Dove Pincushions) Caused by Erysiphe knautiae in North America

Plant Health Progress ◽

10.1094/php-2005-1024-01-br ◽

2005 ◽

Vol 6 (1) ◽

pp. 24

Author(s):

Dean A. Glawe ◽

Gary G. Grove

Keyword(s):

North America ◽

Powdery Mildew ◽

Host Species ◽

Causal Agent ◽

Perennial Species ◽

Powdery Mildew Fungus ◽

Diagnostic Features ◽

First Report ◽

Landscape Plant

Scabiosa columbaria L. (dove pincushions) is a perennial species introduced into North America, where it is grown as an ornamental landscape plant. Little information is available on pathogens attacking it in North America. Recently, the authors encountered a powdery mildew fungus on this host species in Washington and determined it to be Erysiphe knautiae Duby. This report describes the disease as well as diagnostic features and taxonomy of the causal agent. Accepted for publication 11 October 2005. Published 24 October 2005.

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First Report of Powdery Mildew of Lycium chinense (Chinese Matrimony Vine) Caused by Arthrocladiella mougeotii in the Pacific Northwest

Plant Health Progress ◽

10.1094/php-2004-1208-01-hn ◽

2004 ◽

Vol 5 (1) ◽

pp. 16

Author(s):

Dean A. Glawe

Keyword(s):

North America ◽

Powdery Mildew ◽

Medicinal Plant ◽

Pacific Northwest ◽

Morphological Features ◽

Lycium Chinense ◽

First Report ◽

Landscape Plant ◽

The Pacific ◽

Plant Grown

Chinese matrimony-vine (Lycium chinense Mill.) is a traditional medicinal plant grown in China and used as a perennial landscape plant in North America. This report documents the presence of powdery mildew on L. chinense in the Pacific Northwest and describes and illustrates morphological features of the causal agent. It appears to be the first report of a powdery mildew caused by Arthrocladiella in the Pacific Northwest. Accepted for publication 10 November 2004. Published 8 December 2004.

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First report of the western conifer seed bug, Leptoglossus occidentalis Heidemann, 1910 (Hemiptera, Coreidae) in Paraguay

Paraquaria Natural ◽

10.32525/paraquarianat.2020.(8):12.14 ◽

2021 ◽

Vol 8 (2) ◽

pp. 12-14

Author(s):

Bolívar R. Garcete-Barrett ◽

◽

Sergio D. Rios ◽

Sergio Galeano ◽

◽

...

Keyword(s):

North America ◽

Western North America ◽

First Report ◽

Leptoglossus Occidentalis ◽

Conifer Seed ◽

First Time ◽

Western Conifer Seed Bug

The Western conifer seed bug, Leptoglossus occidentalis Heidemann, 1910, native to western North America and in ongoing worldwide expansion, is recorded from Paraguay for the first time.

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First Report of Powdery Mildew of Platanus occidentalis caused by Microsphaera platani (Erysiphe platani) in Washington State

Plant Health Progress ◽

10.1094/php-2003-0818-01-hn ◽

2003 ◽

Vol 4 (1) ◽

pp. 33 ◽

Cited By ~ 2

Author(s):

Dean A. Glawe

Keyword(s):

North America ◽

Powdery Mildew ◽

Native Species ◽

Washington State ◽

Eastern North America ◽

First Report ◽

Platanus Occidentalis

American sycamore (Platanus occidentalis L.) is a common native species in eastern North America and is planted widely as a landscape tree in other regions. During a survey of powdery mildew diseases in Washington State, the fungus Microsphaera platani Howe was found on American sycamore trees in Madison Park, Seattle. This report documents the presence of M. platani in Washington State and presents information on the fungus. Accepted for publication 30 July 2003. Published 18 August 2003.

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