THE RELATIVE PREVALENCE OF SPECIALIZED FORMS OF PUCCINIA CORONATA THAT OCCUR ON RHAMNUS CATHARTICA IN CANADA

1954 ◽  
Vol 32 (1) ◽  
pp. 40-47 ◽  
Author(s):  
B. Peturson
Keyword(s):  
North America ◽  
The Other ◽  
Puccinia Coronata ◽  
Rhamnus Cathartica ◽  
Eastern Canada ◽  
Formae Speciales ◽  
The Third ◽  
Relative Prevalence

Surveys were made during the period 1947–1951 to determine the prevalence and distribution of the specialized forms (formae speciales) of Puccinia coronata Corda which occur on Rhamnus cathartica L. in Canada. From 96 aecial collections obtained in Manitoba and in Eastern Canada on R. cathartica, three distinct forms of P. coronata were isolated. Two of these, f. sp. avenae and f. sp. festucae, had been isolated previously in both Europe and North America. The third form, which could not be identified with any previously described form, was pathogenic on many species of wild and cultivated grasses, as well as on many varieties of barley and rye, but was nonpathogenic on oats. It is given the designation P. coronata f. sp. secalis f. sp. nov. The uredial stage of f. sp. secalis is much darker in color than the corresponding stage of the other two forms and it can be distinguished from them quite readily. The forms avenae and secalis occurred in Manitoba and Eastern Canada, while the form festucae was found in Eastern Canada only. In Eastern Canada the forms avenae, secalis, and festucae, in the order named, comprised 60.6, 36.6, and 2.8% of the isolates. In Manitoba, the form avenae comprised 16 and the form secalis 84% of the isolates.

Productivity of Owikeno Lake, British Columbia

1969 ◽  
Vol 26 (5) ◽  
pp. 1363-1368 ◽  
Author(s):  
David W. Narver
Keyword(s):  
British Columbia ◽  
North America ◽  
Primary Productivity ◽  
Sockeye Salmon ◽  
Nursery Area ◽  
The Other ◽  
Lake Productivity ◽  
The Third ◽  
Annual Total

Although Owikeno Lake is the third highest producer of adult sockeye salmon in North America in terms of mean annual total return (catch plus escapement) per unit of lake nursery area, limited measurements of other indices of lake productivity suggest that its primary productivity is much lower than that of the other four highest sockeye-producing lakes. The implications of these results to sockeye production are discussed.

THE DISTRIBUTION AND FREQUENCY OF OCCURRENCE OF PHYSIOLOGIC RACES OF PUCCINIA CORONATA CORDA F. SP. AVENAE ERIKSS., IN CANADA, 1952 TO 1961

1963 ◽  
Vol 41 (4) ◽  
pp. 481-487 ◽  
Author(s):  
G. Fleischmann ◽  
D. J. Samborski ◽  
B. Peturson
Keyword(s):  
Crown Rust ◽  
Puccinia Coronata ◽  
Western Canada ◽  
Frequency Of Occurrence ◽  
Rhamnus Cathartica ◽  
Alternate Host ◽  
Eastern Canada ◽  
The West ◽  
Differential Host ◽  
Physiologic Races

From 1952 to 1956 the races of crown rust, Puccinia coronata Corda f. sp. avenae Erikss., that predominated in Eastern Canada were 201, 202, 203, 209, 239, and 240. Races 201, 202, and 204 occurred most frequently in Western Canada. These races cannot attack the differential host variety Victoria, from which the currently grown commercial varieties Rodney and Garry derive their resistance. Garry and Rodney became widely grown in Canada by 1957, and since then races 216 and 274, which can attack Victoria, have become prominent, especially in Western Canada.More races are found in Eastern Canada than in the west, and there is less tendency for a few races to predominate in the east. These differences may be explained by the relatively frequent occurrence of the alternate host, Rhamnus cathartica L., in important oat-growing regions of Eastern Canada, and by the cultivation of large acreages of a few varieties with similar resistance in the west. The most important factor affecting the distribution and frequency of occurrence of races is the variety grown.

Cybister (s. str.) poblanus sp. n. from Mexico and notes on other species of Cybistrinae (Coleoptera: Dytiscidae)

Zootaxa ◽  
2021 ◽  
Vol 5061 (2) ◽  
pp. 323-339
Author(s):  
ROBERTO ARCE-PÉREZ ◽  
RODOLFO NOVELO-GUTIÉRREZ ◽  
HANS FERY
Keyword(s):  
New Species ◽  
North America ◽  
Male Genitalia ◽  
The Other ◽  
Key To Species ◽  
The Bahamas ◽  
Caribbean Islands ◽  
The Third ◽  
Great Size ◽  
The Caribbean

Cybister (s. str.) poblanus sp. n. is described from the Puebla state in Mexico. The species belongs to a group of members of the genus Cybister Curtis, 1827, which occur only in North America (including the Caribbean Islands) and are characterised by having several distinct ridges on the metacoxae (stridulatory organ) in males. The new species is the third of the genus reported for Mexico and the fourth for North America. It can easily be separated from its congeners by its great size and the shape of the male aedeagus. The habitus, the male genitalia and other details of C. poblanus sp. n. are illustrated and photographs of the male genitalia of the other three Cybister are given for comparison. Megadytes (Bifurcitus) lherminieri (Guérin-Méneville, 1829) and M. (B.) magnus Trémouilles & Bachmann, 1980 are the only other big species of subfamily Cybistrinae which occur in North America. They are externally similar to the new species and can easily be confused with it, hence the illustrations of their aedeagi to facilitate identification. A key to species is given for all species of Cybistrinae occurring in America north of Belize and Guatemala, including Cuba and the Bahamas. Lectotypes are designated for Cybister flavocinctus Aubé, 1838, Cybister explanatus var. fusculus Zimmermann, 1919, and Cybister (Megadytes) aubei Wilke, 1920. Notes are given on material of some Neotropical and Nearctic species of Cybister and Megadytes stored in different museums.  

The millipede Craspedosoma raulinsii Leach, 1814 (Chordeumatida: Craspedosomatidae) in North America with comments on the derivation of its binomial name

Zootaxa ◽  
2018 ◽  
Vol 4455 (2) ◽  
pp. 389 ◽  
Author(s):  
DONALD F. McALPINE ◽  
WILLIAM A. SHEAR
Keyword(s):  
North America ◽  
New Brunswick ◽  
Central Europe ◽  
New World ◽  
New Records ◽  
Eastern Canada ◽  
Widespread Occurrence ◽  
The Third ◽  
Southern Scandinavia ◽  
First Time

The millipede Craspedosoma raulinsii (Craspedosomatidae) is widespread in Central Europe from Belarus and southern Scandinavia west to Britain and Ireland. Although the species is often not common and rarely encountered (Blower 1985, Hoffman 1999, Lee 2006), Kime (2004) reports C. raulinsii as the third most widespread millipede in Belgium. Shelley (1990) reported C. raulinsii (as C. rawlinsii) for the first time from North America (from Gatineau Park, Quebec, Canada) and noted the occurrence is the first introduction of a representative of the order Chordeumatida in the New World. Here we report new records that suggest widespread occurrence of this introduced millipede in eastern Canada and comment on the commonly-applied spelling of the specific epithet of the species. Vouchers have been deposited in the collections of the New Brunswick Museum (NBM).

Larvae of the Nearctic Species of Anoplonyx (Tenthredinidae, Hymenoptera)

1955 ◽  
Vol 87 (5) ◽  
pp. 224-227 ◽  
Author(s):  
H. R. Wong
Keyword(s):  
North America ◽  
The Other ◽  
Eastern Canada ◽  
Considerable Confusion

Considerable confusion exists concerning the identification of larvae of the genus Anoplonyx in North America. Larvae of two species collected in Eastern Canada have been generally identified as one species, A. laricis (Martatt). A published larval description of the other species, A. canadensis Harrington, is not available. Keen's (1938) published descriptions of the western species (A. occidens Ross and A. laricivorus Rohwer and Middleton) apparently had the wrong association between larvae and adults. This study was undertaken to provide more detailed larval descriptions of nearctic species of Anoplonyx as listed by Ross (1951).

scholarly journals MONOGRAPH OF THE LOMATINA OF NORTH AMERICA

1886 ◽  
Vol 18 (5) ◽  
pp. 81-87
Author(s):  
D. W. Coquillett
Keyword(s):  
North America ◽  
The Other ◽  
Terminal Portion ◽  
The Third ◽  
Cross Vein

The Lomatina may easily be distinguished from the other Bombylidæ by the following characters:Front very large; antennæ shorter than the head, the third joint at least twice as long as the first, taperirg to the tip, or suddenly contracted near its base, the terminal portion styliform; terminal style minute. Proboscis never projecting more than one half its length beyond the hyperstoma. Front and face when viewed from the side form a gentle curve, never greatly produced at base of antennæ. Wings with two submarginal and four posterior cells; furcation of the second and third veins occurs before the small cross-vein at a distance of at least twice the length of that cross-vein. All of the tibiae bristly.

Identification and proposal of a potentially new clonal complex that is a common cause of MenB disease in central and eastern Canada

2012 ◽  
Vol 58 (10) ◽  
pp. 1236-1240 ◽  
Author(s):  
Raymond S.W. Tsang ◽  
Brigitte Lefebvre ◽  
Frances B. Jamieson ◽  
Rodica Gilca ◽  
Shelley L. Deeks ◽  
...  
Keyword(s):  
Clonal Complex ◽  
Present Finding ◽  
Variable Region ◽  
The Other ◽  
Eastern Canada ◽  
Common Cause ◽  
The Third ◽  
Common Causes ◽  
Canadian Provinces ◽  
Sequence Types

This study examined serogroup B meningococci (MenB) from invasive meningococcal disease (IMD) cases in the provinces of Québec and Ontario in the last decade by multilocus sequence typing (MLST) to determine their sequence types (STs) and clonal complexes (CCs). Forty isolates from individual MenB IMD cases were found to belong to 8 related STs, with ST-336 being the founding ST and the other 7 STs being single locus variants of ST-336. Eleven isolates belonged to ST-336, 23 belonged to ST-5571, and the other 6 were represented individually by a single different ST. All but 1 of these 40 isolates have the PorA variable-region type of P1.22,14,36. Interrogation of the Neisseria MLST web site with the present finding did not put any of the 8 related STs into known CCs. Since these 8 related STs were common causes of IMD, with ST-5571 being the most frequently identified ST in Ontario and ST-336 the third most common ST identified in Québec, we propose that ST-336 and its related STs is a potentially new meningococcal clonal complex that is endemic in the Canadian provinces of Québec and Ontario, and they constitute a common cause of IMD.

Efficacy of some insecticide modules against major insect pests and spider population of rice, Oryza sativa L.

ENTOMON ◽  
2018 ◽  
Vol 43 (4) ◽  
pp. 257-262
Author(s):  
Atanu Seni ◽  
Bhimasen Naik
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Untreated Control ◽  
Insect Pests ◽  
Oryza Sativa L ◽  
Gall Midge ◽  
Stem Borer ◽  
The Other ◽  
The Third ◽  
Treated Plot

Experiments were carried out to assess some insecticide modules against major insect pests of rice. Each module consists of a basal application of carbofuran 3G @ 1 kg a.i ha-1 at 20 DAT and Rynaxypyr 20 SC @ 30 g a.i ha-1 at 45 DAT except untreated control. All modules differ with each other only in third treatment which was applied in 65 DAT. The third treatment includes: Imidacloprid 17.8 SL @ 27 g a.i ha-1, Pymetrozine 50 WG @ 150 g a.i ha-1, Triflumezopyrim 106 SC @ 27 g a.i ha-1, Buprofezin 25 SC @ 250 g a.i ha-1; Glamore (Imidacloprid 40+Ethiprole 40% w/w) 80 WG @ 100 g a.i. ha-1, Thiacloprid 24 SC @ 60 g a.i ha-1, Azadirachtin 0.03 EC @ 8 g a.i ha-1, Dinotefuran 20 SG@ 40 g a.i ha-1 and untreated control. All the treated plots recorded significantly lower percent of dead heart, white ear- head caused by stem borer and silver shoot caused by gall midge. Module with Pymetrozine 50 WG @ 150 g a.i ha-1 treated plot recorded significantly higher per cent reduction of plant hoppers (>80% over untreated control) and produced higher grain yield (50.75 qha-1) than the other modules. Among the different treated modules the maximum number of spiders was found in Azadirachtin 0.03 EC @ 8 g a.i ha-1 treated module plot followed by other treatments.

Retroaktive Neuverhandlung

2018 ◽  
Vol 63 (1) ◽  
Author(s):  
Daniel Martin Feige
Keyword(s):  
Original Work ◽  
The Other ◽  
Final Part ◽  
Critical Reading ◽  
The Third ◽  
Works Of Art ◽  
The Relationship

Der Beitrag widmet sich der Frage historischer Folgeverhältnisse in der Kunst. Gegenüber dem Gedanken, dass es ein ursprüngliches Werk in der Reihe von Werken gibt, das späteren Werken seinen Sinn gibt, schlägt der Text vor, das Verhältnis umgekehrt zu denken: Im Lichte späterer Werke wird der Sinn früherer Werke neu ausgehandelt. Dazu geht der Text in drei Schritten vor. Im ersten Teil formuliert er unter der Überschrift ›Form‹ in kritischer Abgrenzung zu Danto und Eco mit Adorno den Gedanken, dass Kunstwerke eigensinnig konstituierte Gegenstände sind. Die im Gedanken der Neuverhandlung früherer Werke im Lichte späterer Werke vorausgesetzte Unbestimmtheit des Sinns von Kunstwerken wird im zweiten Teil unter dem Schlagwort ›Zeitlichkeit‹ anhand des Paradigmas der Improvisation erörtert. Der dritte und letzte Teil wendet diese improvisatorische Logik unter dem Label ›Neuaushandlung‹ dann dezidiert auf das Verhältnis von Vorbild und Nachbild an. The article proposes a new understanding of historical succession in the realm of art. In contrast to the idea that there is an original work in the series of works that gives meaning to the works that come later, the text proposes to think it exactly the other way round: in the light of later works, the meanings of earlier works are renegotiated. The text proceeds in three steps to develop this idea. Under the heading ›Form‹ it develops in the first part a critical reading of Danto’s and Eco’s notion of the constitution of the artworks and argues with Adorno that each powerful work develops its own language. In the second part, the vagueness of the meaning of works of art presupposed in the idea of renegotiating earlier works in the light of later works is discussed under the term ›Temporality‹ in terms of the logic of improvisation. The third and final part uses this improvisational logic under the label ›Renegotiation‹ to understand the relationship between model and afterimage in the realm of art.

Sign in / Sign up

Export Citation Format

Share Document