THE HYMENOPTEROUS PARASITES (HYMENOPTERA: APHIDIIDAE ET APHELINIDAE) OF THE PEA APHID IN EASTERN NORTH AMERICA

1967 ◽  
Vol 99 (10) ◽  
pp. 1051-1082 ◽  
Author(s):  
Manfred Mackauer ◽  
Thelma Finlayson
Keyword(s):  
North America ◽  
Acyrthosiphon Pisum ◽  
Larval Instar ◽  
Pea Aphid ◽  
Species Differentiation ◽  
Eastern North America ◽  
Eastern Canada

AbstractThe adults, mummies, and final-instar larvae of the eight hymenopterous parasites of the pea aphid, Acyrthosiphon pisum (Harris), in Eastern Canada are described and illustrated. The history, synonymy, and biology of each species, and the problems of species differentiation in two of the genera, Aphidius and Praon, are discussed. Keys are given to separate the adults, mummies, and cast skins of the last larval instar.

scholarly journals Do Barrow's Goldeneyes, Bucephala islandica, Breed South of the St. Lawrence Estuary in the Gaspé Peninsula, Eastern Canada?

2010 ◽  
Vol 124 (2) ◽  
pp. 179
Author(s):  
Jean-François Ouellet ◽  
Pierre Fradette ◽  
Isabel Blouin
Keyword(s):  
North America ◽  
Breeding Season ◽  
Breeding Habitat ◽  
Eastern North America ◽  
Eastern Canada ◽  
Lawrence Estuary ◽  
North Shore ◽  
The North ◽  
Bucephala Islandica ◽  
St Lawrence Estuary

We report the first observations of Barrow's Goldeneyes south of the St. Lawrence estuary in typical breeding habitat during the breeding season. Until recently, the confirmed breeding locations for the species in Eastern North America were all located on the north shore of the Estuary and Gulf of St. Lawrence.

A taxonomic reevaluation of North American Daphnia (Crustacea: Cladocera). III. The D. catawba complex

1997 ◽  
Vol 75 (8) ◽  
pp. 1254-1261 ◽  
Author(s):  
Paul D. N. Hebert ◽  
Terrie L. Finston
Keyword(s):  
North America ◽  
New England ◽  
Common Ancestor ◽  
Genotypic Diversity ◽  
Species Boundaries ◽  
Eastern North America ◽  
Eastern Canada ◽  
Cyclic Parthenogenesis ◽  
Forest Regions ◽  
Daphnia Catawba

Despite the importance of Daphnia in freshwater zooplankton assemblages, species boundaries in the genus are unclear. This study verifies the taxonomic validity of D. catawba by establishing its genetic divergence from other species of Daphnia that occur in eastern North America. In addition, it reveals the presence of a second, closely allied species, D. minnehaha, which had previously been placed in synonomy with D. pulex. Daphnia catawba and D. minnehaha share a preference for acidic habitats and are restricted to the deciduous and boreal forest regions of the eastern portion of the continent, where D. catawba is restricted to lakes, while D. minnehaha occurs in ponds. Both species reproduce by cyclic parthenogenesis and, based on the extent of their allozyme differentiation, last had a common ancestor more than 7 million years ago. Populations of D. minnehaha fall into two genetic clades; those from the Great Lakes watershed are morphologically divergent and have much lower levels of genotypic diversity than those from eastern Canada and the New England states.

Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America

Zootaxa ◽  
2011 ◽  
Vol 2973 (1) ◽  
pp. 1 ◽  
Author(s):  
VALERIE M. BEHAN-PELLETIER
Keyword(s):  
North America ◽  
Oribatid Mite ◽  
Eastern North America ◽  
Eastern Canada ◽  
New Distribution ◽  
Mite Genus

The oribatid mite genus Oribatella (Oribatellidae) includes 107 species worldwide, with 13 species reported for eastern North America. Herein, I describe six new Oribatella species from eastern North America: O. flagellata sp. nov., O. jacoti sp. nov., O. nortoni sp. nov., O. metzi sp. nov., O. texana sp. nov., and O. transtriata sp. nov. Oribatella metzi and O. nortoni are described on the basis of adults and immatures. The deutonymph and tritonymph of O. metzi lack dorsocentral setae dm and dp, and the diagnosis of the genus is expanded to accommodate these newly described immatures, and also newly described adult characters. I provide expanded, detailed diagnoses for previously described species of eastern North America: Oribatella arctica Thor, 1930, O. brevicornuta Jacot, 1934, O. dentaticuspis Ewing, 1910, O. gigantea Berlese, 1916, O. mediocris Berlese, 1916, O. minuta Banks, 1896, O. plummeri Jacot, 1934, O. pusilla Berlese, 1916, O. quadridentata Banks, 1895, O. reticulata Berlese, 1916, O. reticulatoides Hammer, 1955 and provide new distribution records where available. I question the specific status of O. extensa Jacot, 1934, and consider records of O. sexdentata Berlese, 1916 from eastern North America to be doubtful. Oribatella quadricornuta (Michael, 1880) is confirmed to occur in eastern Canada. Finally, I give a key to adults of the 18 species of Oribatella now known from eastern North America.

Lithocolletis blancardella Fabricius (Lepidoptera: Gracilariidae) on Apple in Eastern North America with Notes on Other Species Occurring on Rosaceae

1964 ◽  
Vol 96 (11) ◽  
pp. 1442-1449 ◽  
Author(s):  
H. T. Stultz
Keyword(s):  
United States ◽  
North America ◽  
Leaf Miner ◽  
Eastern North America ◽  
Similar Species ◽  
Black Cherry ◽  
Northeastern United States ◽  
Maritime Provinces ◽  
Eastern Canada ◽  
Large Numbers

AbstractA spotted tentiform leaf miner, often present during recent years in large numbers in apple orchards in the Maritime Provinces of Canada, is identified as Lithocolletis blancardella Fabr., a species common on apples in Europe. Recent collecting indicates that the species occurs widely in Eastern Canada and the northeastern United States. Diagnostic characters, especially those of the male genitalia, are compared with those of specimens identified as L. crataegella Clem. and L. propinquinella Braun, two similar species which commonly occur on apple and black cherry respectively.

scholarly journals Hemithea aestivaria (Hübner) (Lepidoptera: Geometridae), a Palaearctic moth new to eastern North America

2021 ◽  
Author(s):  
Christian Schmidt ◽  
Alexandre Anctil
Keyword(s):  
British Columbia ◽  
North America ◽  
Pacific Northwest ◽  
North American ◽  
Eastern North America ◽  
Urban Centers ◽  
Eastern Canada ◽  
Restricted Area ◽  
The Pacific ◽  
Geometrid Moth

The geometrid moth Hemithea aestivaria (Hübner, 1789) was introduced from Europe to North America, first detected in British Columbia in 1973. Until 2019, its North American range was limited to a restricted area of the Pacific Northwest. Here, we report on the first records of H. aestivaria for eastern North America from three widely separated urban centers in eastern Canada during 2019-2020.

Diapause induction in the sawfly Neodiprion rugifrons Middleton (Hymenoptera: Diprionidae)

1973 ◽  
Vol 51 (1) ◽  
pp. 105-108 ◽  
Author(s):  
G. Knerer ◽  
Rosemary Marchant
Keyword(s):  
North America ◽  
Larval Instar ◽  
Jack Pine ◽  
Diapause Induction ◽  
Eastern North America ◽  
Single Generation ◽  
Sensitive Stage ◽  
Two Generations

Neodiprion rugifrons Midd. occurs on jack pine in eastern North America, where it has a single generation per year in Ontario, but two generations in Wisconsin when spring is exceptionally mild and early. Only in this situation will the sensitive last larval instar in June receive the photoperiod of around 17 h that prevents diapause induction and allows the production of another generation, whose sensitive stage is then subjected to a short, diapause-inducing photoregime in September or October.

scholarly journals Hemithea aestivaria (Hübner) (Lepidoptera: Geometridae), a Palaearctic moth, new to eastern North America

2021 ◽  
Vol 9 ◽  
Author(s):  
Christian Schmidt ◽  
Alexandre Anctil
Keyword(s):  
British Columbia ◽  
North America ◽  
Pacific Northwest ◽  
North American ◽  
Eastern North America ◽  
Eastern Canada ◽  
Restricted Area ◽  
The Pacific ◽  
Geometrid Moth

The geometrid moth Hemithea aestivaria (Hübner, 1789) was introduced from Europe to North America, first being detected in British Columbia in 1973. Until 2019, its North American range was limited to a restricted area of the Pacific Northwest. Here, we report on the first records of H. aestivaria for eastern North America from three widely separated urban centres in eastern Canada during 2019-2020.

Implications of Revised Seismic Spectra for Eastern North America on Response of Nonstructural Components and Piping

2012 ◽  
Author(s):  
Hesham H. H. Mohammed ◽  
Waleed Mekky
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
North America ◽  
Nuclear Power ◽  
Dynamic Properties ◽  
Eastern North America ◽  
Structural Components ◽  
Uniform Hazard Spectra ◽  
Eastern Canada ◽  
Nonstructural Components

The seismic response and qualification of nuclear power plant related building structures and non-structural components are affected by the sub-systems’ dynamic properties as well as the external excitation level and characteristics; to which these subsystems are subjected in a seismic event. Recently a great interest in the seismic characteristics of Eastern North America has resulted in the revision of the methodology used to develop response spectra for Nuclear Power Plant (NPP) sites including Eastern Canada. Currently site specific Uniform Hazard Spectra (UHS) are developed based on updated data that is specific to the continental East North America region and modified ground motion prediction equations. The revised UHS exhibit higher amplification in the high frequency range as compared to standard spectral shapes traditionally used in CSA/CAN3 289.3 for 1981. This paper presents the numerical results and observations for an investigation aimed at identifying the effect of these revised UHS spectral shape on the response on non structural components including piping typically requiring seismic qualification in NPPs.

Production and Distribution of Balsam Fir Lumber in Eastern North America

1983 ◽  
Vol 59 (3) ◽  
pp. 128-131
Author(s):  
Steven A. Sinclair ◽  
Robert L. Govett
Keyword(s):  
North America ◽  
Balsam Fir ◽  
Annual Production ◽  
Eastern North America ◽  
Eastern Canada ◽  
Drying Time ◽  
Softwood Lumber ◽  
Production Problem ◽  
Production And Distribution ◽  
Softwood Species

A total of 819 North American sawmills were surveyed concerning their production and distribution of balsam fir lumber. Seventy-one mills reported a total annual production of 275 million board feet (648 585 m3) of balsam fir lumber. The larger mills of eastern Canada represented 72% of this total. Canadian and large eastern US sawmills used middlemen heavily in marketing their softwood lumber while the remaining US sawmills used direct selling and captive retail yards as primary market channels. The only major production problem reported was the longer drying time needed for balsam fir lumber when compared to other northern softwood species.

Differential responses of biotypes of the pea aphid, Acyrthosiphon pisum (Harris), to a chemically defined diet

1978 ◽  
Vol 56 (12) ◽  
pp. 2481-2485 ◽  
Author(s):  
P. N. Srivastava ◽  
J. L. Auclair
Keyword(s):  
United States ◽  
New Mexico ◽  
North America ◽  
Relative Efficiency ◽  
Acyrthosiphon Pisum ◽  
The United States ◽  
Pea Aphid ◽  
Third Generation ◽  
Total Diet ◽  
Percent Increase

Four clones of the pea aphid, Acyrthosiphon pisum (Harris), collected from different regions in North America (St-Jean and Ile-aux-Coudres, Quebec, in Canada, and New Mexico and Kansas in the United States) were reared on an aseptic chemically defined diet and characterized into biotypes. The clones from St-Jean and Kansas appeared similar and represent one biotype, whereas those from New Mexico and Ile-aux-Coudres were different from each other, as well as from St-Jean and Kansas. Third-generation larvae were produced only by biotypes St-Jean and New Mexico; however, none of them reached the adult stage.The amount of diet ingested and its utilization by different clones also varied. In 24 h, the total diet ingested by flrst-instar larvae from St-Jean, Kansas, New Mexico, and Ile-aux-Coudres was 164,140, 112, and 65 μg per aphid respectively. During the same period the larvae increased their weights by 28, 13, 10, and 10% respectively. Total, or percent increase in weight, was however not proportional to the amount of diet ingested, thus reflecting on the relative efficiency of diet utilization by different clones.

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