scholarly journals Sawadaea tulasnei Powdery Mildew of Norway Maple (Acer platanoides) in North America

Plant Disease ◽  
2006 ◽  
Vol 90 (6) ◽  
pp. 830-830
Author(s):  
J. Weiland ◽  
G. Stanosz
Keyword(s):  
United States ◽  
New York ◽  
North America ◽  
Powdery Mildew ◽  
Acer Saccharum ◽  
The United States ◽  
Rdna Its ◽  
Maple Leaves ◽  
Norway Maple ◽  
Genus 2

Norway maple leaves bearing powdery mildew were collected from one location in the fall of 2003 and four locations (as much as 1.5 km apart) in the fall of 2005 in Buffalo, NY. No powdery mildew was observed on leaves collected from sugar maples (Acer saccharum) that were present in the vicinity of affected Norway maples at two locations. Trees were located along streets and in yards. Diseased leaves were present throughout tree crowns but lower leaves were more commonly affected. White mycelium was present in irregular, discrete, scattered spots only on the upper surface of leaves and on both sides of wings of samaras. Typically, <10% of the upper leaf area bore visible mycelium. Cleistothecia were present singly or in groups on the mycelium. Morphology of cleistothecia on leaves collected each year, including simple and bifid appendages with uncinate to circinate apices, was sufficient to identify the pathogen to the genus Sawadaea (1). Other characteristics were not sufficiently distinct to make an identification of S. bicornis or S. tulasnei (1), each a European species found on Acer spp. However, a sample from 2003 was supplied by the authors for use in a study of phylogeny of the genus (2) that served as a first report of the species in the United States. Analysis of nuclear rDNA ITS sequence of this specimen (GenBank Accession No. AB193390) placed the sample in a clade with S. tulasnei specimens from Europe. In the same study, powdery mildew samples from Acer spp. in Ohio and Montreal, Canada also were placed in this clade. Thus, occurrence of S. tulasnei in North America is confirmed. S. bicornis was recently identified (based on morphology) on Norway maple in the western United States (3). Specimens from Buffalo, NY have been deposited in the U.S. National Fungus Collections (BPI 871210). References: (1) U. Braun. The Powdery Mildews (Erysiphales) of Europe. Gustav Fischer Verlag, Jena-Stuttgart-New York, 1995. (2) S. Hirose et al. Mycol. Res. 109:912, 2005. (3) C. Nischwitz and G. Newcombe. Plant Dis. 87:451, 2003.

scholarly journals Sawadaea Powdery Mildew of Box Elder (Acer negundo) in Wisconsin

Plant Disease ◽  
2007 ◽  
Vol 91 (5) ◽  
pp. 636-636 ◽  
Author(s):  
G. Stanosz ◽  
D. Smith ◽  
J. Stanosz
Keyword(s):  
New York ◽  
North America ◽  
Powdery Mildew ◽  
Lower Surface ◽  
Rdna Its ◽  
Powdery Mildews ◽  
Box Elder ◽  
Norway Maple ◽  
White Mycelium ◽  
Powdery Mildew Pathogen

Box elder leaves affected by powdery mildew were collected from a single tree in an urban yard in the fall of 2006 in Madison, WI. As much as half of the area of the leaf blades, when viewed from above or below, was pale green-to-tan and necrotic. Mycelium was not visible to the eye on either the upper or lower leaf surfaces, but very sparse white mycelium was observed on the lower surface of leaves with the aid of a dissecting microscope. Chasmothecia were present singly or in groups of a few on the lower surface of leaves. Morphology of the chasmothecia, including simple and bifid appendages with uncinate to circinate apices, was sufficient to identify the pathogen to the genus Sawadaea (1). Other characters were not sufficiently distinct to make an identification of the species. However, DNA was extracted from the chasmothecia, and analysis of a 542-bp sequence of nuclear rDNA ITS (GenBank Accession No. EF122238) revealed a 100% match with the respective sequence obtained from Genbank for S. bicornis (Accession No. AB193380). A specimen from which these chasmothecia were obtained has been deposited in the U.S. National Fungus Collections (BPI 877328). S. bicornis is a European pathogen of maples, including box elder when grown there (1). Knowledge of the geographic distribution and hosts of Sawadaea powdery mildews in North America is extremely limited. S. bicornis was first reported in North America only recently, occurring in the states of Idaho and Washington on Norway maple (Acer platanoides) (3). The morphologically very similar European powdery mildew pathogen of maples, S. tulasnei, is known only from New York, Ohio, and Montreal, Canada (4), and an unidentified Sawadaea species on box elder has been reported from California (2). References (1) U. Braun. The Powdery Mildews (Erysiphales) of Europe. Gustav Fischer Verlag, Jena-Stuttgart-New York, 1995. (2) S. Hirose et al. Mycol. Res. 109:912, 2005. (3) C. Nischwitz and G. Newcombe. Plant Dis. 87:451, 2003. (4) J. Weiland and G. Stanosz. Plant Dis. 90:830, 2006.

scholarly journals First Report of Powdery Mildew Caused by Podosphaera (Sphaerotheca) fusca on Euryops pectinatus in North America

Plant Disease ◽  
2000 ◽  
Vol 84 (9) ◽  
pp. 1048-1048 ◽  
Author(s):  
G. S. Saenz ◽  
S. T. Koike ◽  
N. Shishkoff
Keyword(s):  
United States ◽  
New York ◽  
North America ◽  
Powdery Mildew ◽  
Fungal Growth ◽  
The United States ◽  
Voucher Specimen ◽  
First Report ◽  
Humidity Chamber ◽  
Powdery Mildew Pathogen

Gray-leaved Euryops (Euryops pectinatus Cass., Asteraceae) is an evergreen shrub that is widely planted in landscapes in the United States. In the fall of 1999, powdery mildew was observed on E. pectinatus planted in landscapes in Redlands (San Bernardino County), CA. Symptoms consisted only of slight cupping of leaves. Fungal growth was observed on stems, leaves, petioles, and pedicels and was ectophytic and amphigenous. The white mycelium was patchy to effuse. Hyphal appressoria were indistinct (1). Conidiophore foot cells were cylindric and sometimes were tapered toward or constricted at the base. Foot cells measured 30 to 50 by 10 to 12 μm and were followed by one to two shorter cells. Conidia were cylindric to slightly doliform, borne in chains of two to three, and measured 26 to 38 by 14 to 18 μm. Conidial length to width ratios ranged from 1.7 to 2.4. Catenate conidia had crenate edge lines (3). Conidia possessed conspicuous fibrosin bodies and from their sides produced short germ tubes without appressoria. Cleistothecia were not observed. Based on these characters, the fungus was identified as Podosphaera fusca (Fr.) U. Braun & N. Shishkoff (Podosphaera sect. Sphaerotheca) (1,2). Pathogenicity was confirmed by gently pressing diseased leaves onto leaves of healthy E. pectinatus plants. Plants were incubated in a humidity chamber at 22 to 24°C and after 12 to 14 days powdery mildew colonies developed. E. pectinatus cv. Viridis, a cultivar that lacks the extensive pubescence of E. pectinatus, also developed disease when inoculated. This appears to be the first report of powdery mildew on E. pectinatus in North America. A voucher specimen has been deposited into the University of California Herbarium (accession # UC1738635). P. fusca was also observed on cv. Viridis in a nursery in New York in 1999. It is unclear where this pathogen originated. P. fusca parasitizes a large number of asteraceous species including dandelion (Taraxacum officinalis) and sowthistle (Sonchus spp.) weeds, which occur in the area and sometimes are infected with powdery mildew. The Euryops powdery mildew pathogen may be a race that is different than those found on other composites in the United States. The fungus was observed on plants in shaded areas but not on plants in full sun. References: (1) U. Braun. Nova Hedwigia 89:1, 1987. (2) U. Braun and S. Takamatsu. Schlechtendalia 4:1, 2000. (3) H. D. Shin and Y. J. La. Mycotaxon 46:445, 1993.

scholarly journals Collections, Compilations, and Convolutes of Medieval and Renaissance Manuscript Fragments in North America before ca. 1900

Fragmentology ◽  
10.24446/dlll ◽  
2020 ◽  
pp. 73-139
Author(s):  
Scott Gwara
Keyword(s):  
United States ◽  
Nineteenth Century ◽  
New York ◽  
North America ◽  
The United States ◽  
New York University ◽  
Historical Society ◽  
Cornell University ◽  
Private Collections ◽  
Public Exhibition

Using evidence drawn from S. de Ricci and W. J. Wilson’s Census of Medieval and Renaissance Manuscripts in the United States and Canada, American auction records, private library catalogues, public exhibition catalogues, and manuscript fragments surviving in American institutional libraries, this article documents nineteenth-century collections of medieval and Renaissance manuscript fragments in North America before ca. 1900. Surprisingly few fragments can be identified, and most of the private collections have disappeared. The manuscript constituents are found in multiple private libraries, two universities (New York University and Cornell University), and one Learned Society (Massachusetts Historical Society). The fragment collections reflect the collecting genres documented in England in the same period, including albums of discrete fragments, grangerized books, and individual miniatures or “cuttings” (sometimes framed). A distinction is drawn between undecorated text fragments and illuminated ones, explained by aesthetic and scholarly collecting motivations. An interest in text fragments, often from binding waste, can be documented from the 1880s.

“Lascivious Gestures” and “Festive Sports”

2017 ◽  
Author(s):  
James Revell Carr
Keyword(s):  
United States ◽  
New York ◽  
North America ◽  
The United States ◽  
James Cook ◽  
Alta California ◽  
Street Theatre ◽  
Hawaiian Culture ◽  
Hawaiian Women ◽  
Recorded Performances

This chapter examines the first musical encounters between Hawaiians and Euro-American sailors, beginning with the arrival of Captain James Cook in 1778. It explains early European and American visions of what Cook called “The Sandwich Islands,” and demonstrates that modern stereotypes of Hawaiian culture had their genesis in the stories of paradise on earth brought back to Europe and the United States by sailors. It shows how Hawaiians used music and dance as a conscious strategy for pacifying and disseminating information about the potentially violent foreigners. The chapter concludes with stories of the earliest recorded performances of hula in North America: in 1792, when two young Hawaiian women traveling with Captain George Vancouver performed at the home of the governor of Alta California in Monterey; and in 1802, when Hawaiian seamen working aboard American ships performed at the Park Theatre in New York and the Federal Street Theatre in Boston in productions of the popular pantomime The Death of Captain Cook.

scholarly journals Geographic Distribution and rDNA-ITS Region Sequence Diversity of Waitea circinata var. circinata Isolated from Annual Bluegrass in the United States

Plant Disease ◽  
2009 ◽  
Vol 93 (9) ◽  
pp. 906-911 ◽  
Author(s):  
Chi-Min Chen ◽  
Karla A. de la Cerda ◽  
John E. Kaminski ◽  
Greg W. Douhan ◽  
Francis P. Wong
Keyword(s):  
United States ◽  
New York ◽  
Rhode Island ◽  
Geographic Distribution ◽  
Rflp Analysis ◽  
Its Region ◽  
The United States ◽  
Annual Bluegrass ◽  
Rdna Its ◽  
Waitea Circinata

Waitea circinata var. circinata is the causal agent of brown ring patch, an emergent disease of turfgrass in the United States. Forty-two isolates from annual bluegrass were obtained from California, Connecticut, Idaho, Illinois, Massachusetts, New York, Ohio, Oregon, and Rhode Island. Almost all isolates produced white to orange sclerotia (bulbils), 2 to 5 mm in size, that turned dark brown after 21 days on ¼-strength potato dextrose agar. The ribosomal DNA internal transcribed spacer regions and 5.8S region (ITS) were analyzed by restriction fragment length polymorphism (RFLP) analysis using MspI and sequencing to attempt identification of the isolates. Some isolates were heterozygous at the MspI restriction site, results not found in previous reports using the RFLP technique for identification. Four additional nucleotide positions were found to be variable within ITS based on sequence analysis, including two indels and two additional heterozygous positions. A total of 17 ITS haplotypes were found, and there was no obvious relationship between ITS haplotype and the geographic distribution of the isolates. Results of this work indicate that W. circinata var. circinata is present in multiple states and provide an initial understanding of the diversity of the pathogen in the United States.

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