Phytophthora alni subsp. uniformis Found in Alaska Beneath Thinleaf Alders

2008 ◽  
Vol 9 (1) ◽  
pp. 37 ◽  
Author(s):  
Dean A. Glawe ◽  
Steven T. Koike
Keyword(s):  
North America ◽  
Powdery Mildew ◽  
First Record ◽  
Causal Agent ◽  
Golovinomyces Orontii

Periwinkle is a trailing, spreading evergreen plant used in landscapes as a groundcover. Beginning in 2005, a powdery mildew was observed on periwinkle in coastal (Monterey Co.) California. As reported herein, the causal agent was determined to be Golovinomyces orontii (Castagne) V.P. Heluta. This appears to be the first record of a powdery mildew species on Vinca spp. in North America. Accepted for publication 16 October 2008. Published 12 December 2008.

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.

scholarly journals First North American Record of Powdery Mildew of Cleome hassleriana Caused by Leveillula taurica

2007 ◽  
Vol 8 (1) ◽  
pp. 54
Author(s):  
R. Sampangi ◽  
D. A. Glawe ◽  
S. K. Mohan
Keyword(s):  
North America ◽  
Powdery Mildew ◽  
Pacific Northwest ◽  
North American ◽  
Plant Pathogen ◽  
First Record ◽  
Leveillula Taurica ◽  
The Pacific

This report documents the first record of Leveillula taurica on a species of Cleome (spiderflower) in North America. The introduced plant pathogen Leveillula taurica (Lév.) G. Arnaud (anamorph = Oidiopsis sicula Scalia) occurs on a range of hosts in the Pacific Northwest (PNW), including onion and was identified infecting Cleome hassleriana Chod. (common name: pink queen, family: Capparaceae). Accepted for publication 29 December 2007. Published 19 February 2007.

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

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.

scholarly journals Description of Golovinomyces orontii as the Causal Agent of Lettuce (Lactuca sativa) Powdery Mildew in Brazil

Plant Disease ◽  
2019 ◽  
Vol 103 (4) ◽  
pp. 761-761 ◽  
Author(s):  
C. S. Cabral ◽  
M. D. M. Santos ◽  
R. C. F. Borges ◽  
M. E. N. Fonseca ◽  
L. S. Boiteux ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Lactuca Sativa ◽  
Causal Agent ◽  
Golovinomyces Orontii

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

2003 ◽  
Vol 4 (1) ◽  
pp. 27
Author(s):  
Jennifer S. Falacy ◽  
Dean A. Glawe
Keyword(s):  
North America ◽  
Powdery Mildew ◽  
Causal Agent ◽  
King County ◽  
First Report ◽  
Ligustrum Japonicum ◽  
First Time

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.

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

2009 ◽  
Vol 10 (1) ◽  
pp. 48 ◽  
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.

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.

scholarly journals Naturalization and spread of the alien species Ozognathus cornutus (LeConte, 1859) (Coleoptera: Ptinidae: Ernobiinae) in Italy

2021 ◽  
Author(s):  
Giuliano Cerasa ◽  
Gabriella Lo Verde
Keyword(s):  
North America ◽  
Fruits And Vegetables ◽  
First Record ◽  
The Other ◽  
Ecological Role ◽  
Dried Fruits ◽  
Wood Shavings ◽  
Potential Pest ◽  
Small Wood ◽  
Natural Barrier

AbstractOzognathus cornutus (LeConte, 1859) (Coleoptera: Ptinidae: Ernobiinae), species native to North America, is a saproxylophagous species and is known to feed on decaying tissues within conspicuous galls and on vegetal decaying organic material such as dried fruits or small wood shavings and insect excrements in galleries made by other woodboring species. A few years after the first record in 2011, its naturalization in Italy is here reported. The insect was found as successor in galls of Psectrosema tamaricis (Diptera Cecidomyiidae), Plagiotrochus gallaeramulorum, Andricus multiplicatus and Synophrus politus (Hymenoptera Cynipidae). The galls seem to have played an important ecological role in speeding up the naturalization process. The lowest proportion of galls used by O. cornutus was recorded for P. tamaricis (23%), the only host belonging to Cecidomyiidae, while the percentages recorded for the other host species, all Cynipidae forming galls on oaks, were higher: 43.6%, 61.1% and 76.9% in A multiplicatus, S. politus and P. gallaeramulorum, respectively. Although O. cornutus is able to exploit other substrates like dried fruits and vegetables, for which it could represent a potential pest, it prefers to live as a successor in woody and conspicuous galls, which thus can represent a sort of natural barrier limiting the possible damages to other substrates.

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.

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