scholarly journals First Report of Powdery Mildew of Tecoma capensis Caused by Erysiphe peruviana in North America

2010 ◽  
Vol 11 (1) ◽  
pp. 53
Author(s):  
Dean A. Glawe ◽  
Tess Barlow ◽  
Michael E. Matheron
Keyword(s):  
North America ◽  
Powdery Mildew ◽  
Southern Africa ◽  
Present Report ◽  
Ornamental Plant ◽  
Powdery Mildew Fungus ◽  
First Report ◽  
The Usa

Tecoma capensis (Thunb.) Lindl. (Bignoniaceae, common name: Cape honeysuckle), native to southern Africa, is grown as an ornamental plant in warm regions of the USA. The powdery mildew reported previously from T. capensis in North America was an undetermined Oidium species in Florida. The present report documents the occurrence of the powdery mildew fungus Erysiphe peruviana (Syd.) U. Braun & S. Takam. on T. capensis in Arizona. Accepted for publication 4 January 2010. Published 15 March 2010.

First Report of Powdery Mildew of Omphalodes cappadocica Caused by Golovinomyces cynoglossi (Erysiphe cynoglossi) in North America

2006 ◽  
Vol 7 (1) ◽  
pp. 47
Author(s):  
Dean A. Glawe ◽  
Joseph F. Ammirati
Keyword(s):  
North America ◽  
Powdery Mildew ◽  
Ornamental Plant ◽  
Causal Organism ◽  
First Report ◽  
The Usa ◽  
Private Garden

Omphalodes cappadocica DC (Boraginaceae) is grown as an ornamental plant in the USA. Powdery mildew was observed on specimen plants of O. cappadocica growing in a private garden in Seattle, WA in August 2006. This report describes and illustrates powdery mildew of O. cappadocica as well as taxonomically-important features of the causal organism. Accepted for publication 6 October 2006. Published 27 November 2006.

First Report of Powdery Mildew of Stachys byzantina (Lamb's Ear) Caused by Neoerysiphe galeopsidis in North America

2007 ◽  
Vol 8 (1) ◽  
pp. 36 ◽  
Author(s):  
Dean A. Glawe ◽  
Steven T. Koike
Keyword(s):  
North America ◽  
Powdery Mildew ◽  
Ornamental Plant ◽  
Commercial Building ◽  
First Report ◽  
Powdery Mildew Disease

During the summer of 2007 the authors encountered a previously unrecorded powdery mildew disease on several plants of the perennial ornamental plant Stachys byzantina K. Koch ex Scheele (common names: woolly hedgenettle, woolly betony, and lamb's ear) growing in a plant bed near a commercial building in Salinas (Monterey Co.), California. This report documents the occurrence of Neoerysiphe galeopsidis on this host in North America. Accepted for publication 11 October 2007. Published 17 December 2007.

First Report of Powdery Mildew of Eschscholzia californica (California Poppy) caused by Erysiphe cruciferarum in North America

2006 ◽  
Vol 7 (1) ◽  
pp. 45 ◽  
Author(s):  
Dean A. Glawe
Keyword(s):  
North America ◽  
Powdery Mildew ◽  
Pacific Northwest ◽  
Ongoing Study ◽  
Annual Species ◽  
Powdery Mildew Fungus ◽  
First Report ◽  
California Poppy ◽  
The Pacific ◽  
Erysiphe Cruciferarum

California poppy is an annual species grown widely in the Pacific Northwest. Once established, populations are self-seeding and require little care. During an ongoing study of Erysiphales, a powdery mildew fungus was collected repeatedly on this species in Seattle, WA. The fungus was determined to be Erysiphe cruciferarum Opiz ex Junell, a species not reported previously on this host in North America. This report documents the occurrence of the disease and provides information on the morphology and identification of the causal agent. Accepted for publication 8 November 2006. Published 13 December 2006.

scholarly journals First Report of Powdery Mildew Caused by Erysiphe arcuata on Lanceleaf Coreopsis (Coreopsis lanceolata) in Korea

Plant Disease ◽  
2012 ◽  
Vol 96 (12) ◽  
pp. 1827-1827 ◽  
Author(s):  
H. B. Lee
Keyword(s):  
Powdery Mildew ◽  
Invasive Plant ◽  
Signs And Symptoms ◽  
Morphological Data ◽  
Powdery Mildew Fungus ◽  
First Report ◽  
Rdna Its ◽  
The World ◽  
The Usa ◽  
Cut Foliage

Lanceleaf coreopsis (Coreopsis lanceolata L.) is a plant species of the genus Coreopsis in Asteraceae native to the USA. This plant is a bushy perennial species with finely cut foliage and showy round flowers and is increasing as plants used in landscaping in the world. The invasive plant is also planted very commonly along roadsides in Korea. In late October 2011 and August 2012, signs and symptoms of a powdery mildew disease were observed on lanceleaf coreopsis in several land areas near Gwangju-river, Gwangju, Korea. Symptoms included typical white superficial mycelia. The conidia of the powdery mildew fungus occurred on adaxial and abaxial surfaces. Chasmothecia were not observed. Single conidia formed terminally on conidiophores. Conidial morphology was subcylindrical to oblong. Dimension of conidia was 23.6 to 41.4 (avg. 35.1) μm long × 11.3 to 18.2 (avg. 14.8) μm wide. Conidiophores were composed of five to six (up to seven) cells, ranged from 45.7 to 131.2 (avg. 98.1) μm long × 8.2 to 11.1 (avg. 8.3) μm wide with foot-cells straight to slightly flexuous. Oidium anamorph of this fungus matched that of E. arcuata U. Braun, Heluta and S. Takam. described by Pastircakova et al. (3). From extracted genomic DNA, the rDNA ITS was amplified with ITS1F (5′-CTTGGTCATTTAGAGGAAGT-3′) and LR5F (5′-GCTATCCTGAGGGAAAC-3′) primer set. The rDNA ITS homology of the fungus (EML-CDPW1, GenBank Accession No. JX485650) showed 100% (590/590) identity value with E. arcuata (GenBank Accession No. AB252459). The identification of the fungus as E. arcuata was based on morphological data combined with the results of sequence analysis. Until recently, E. arcuata has been known to widespread on Carpinus species of the family Betulaceae including European hornbeam (C. betulus L.) and Chonowski's hornbeam (C. tschonoskii Maxim.) in Asia and Europe since Braun et al. first reported it as a new species in 2006 (1). In Korea, Podosphaera fusca (= Sphaerotheca fusca) and P. fuliginea (= S. fuliginea) were reported to cause powdery mildews on Coreopsis lanceolata. E. cichoracearum (= Golovinomyces cichoracearum), Leveillula taurica, P. fusca (= S. fusca), and Oidium spp. have been reported on Coreopsis spp. in the world (3). To our knowledge, this is the first report of powdery mildew caused by Oidium anamorph of E. arcuata on lanceleaf coreopsis (C. lanceolata) in Korea or elsewhere in the world. References: (1) U. Braun et al. Mycol. Prog. 5:139, 2006. (2) D. F. Farr and A. Y. Rossman. Fungal Databases, Systematic Mycology and Microbiology Laboratory, ARS, USDA. http://nt.ars-grin.gov/fungaldatabases/ , 2012. (3) K. Pastircakova et al. J. Phytopathol. 156:597, 2008.

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

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.

First Report of Powdery Mildew of Convolvulus arvensis (Field Bindweed) Caused by Erysiphe convolvuli var. convolvuli in North America

2003 ◽  
Vol 4 (1) ◽  
pp. 31
Author(s):  
Dean A. Glawe ◽  
Gwenyth E. Windom ◽  
Gary G. Grove ◽  
Jennifer S. Falacy
Keyword(s):  
North America ◽  
Powdery Mildew ◽  
Pacific Northwest ◽  
Morphological Features ◽  
Convolvulus Arvensis ◽  
Powdery Mildew Fungus ◽  
First Report ◽  
The Pacific ◽  
Field Bindweed ◽  
Noxious Weed

Field bindweed (Convolvulus arvensis L.) is widespread in the Pacific Northwest where it is considered a noxious weed. During 2002, collections of a powdery mildew fungus attacking C. arvensis were made from Pierce, Spokane, Whitman, and Yakima counties, WA. Based on morphological features we determined the fungus to be Erysiphe convolvuli. Accepted for publication 22 September 2003. Published 21 October 2003.

scholarly journals First Report of Powdery Mildew of Gaillardia × grandiflora (Blanket Flower) Caused by Leveillula taurica in North America

2006 ◽  
Vol 7 (1) ◽  
pp. 60
Author(s):  
Dean A. Glawe ◽  
Gary G. Grove ◽  
Mark Nelson
Keyword(s):  
North America ◽  
Powdery Mildew ◽  
Powdery Mildew Fungus ◽  
First Report ◽  
Leveillula Taurica ◽  
Powdery Mildew Disease

During recent surveys of fieldgrown Gaillardia × grandiflora (Blanket flower) in Yakima Co., WA, a powdery mildew disease was observed on the cv. ‘Baby Cole.’ This report documents the occurrence of the powdery mildew fungus in question (Leveillula taurica (Lév.) G. Arnaud) on Gaillardia × grandiflora and provides information on disease symptomatology as well as features distinguishing this fungus from other powdery mildew pathogens of Gaillardia in North America. Accepted for publication 8 December 2005. Published 12 January 2006.

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

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.

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

2003 ◽  
Vol 4 (1) ◽  
pp. 33 ◽  
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.

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

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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