Use of cuticular hydrocarbons in bark beetle parasitoid taxonomy: A study of Roptrocerus xylophagorum (Ratzeburg) (Hymenoptera: Torymidae) from the United States, Europe and Australia

1996 ◽  
Vol 113 (1) ◽  
pp. 193-198 ◽  
Author(s):  
Karl E. Espelie ◽  
C.Wayne Berisford ◽  
Donald L. Dahlsten
Keyword(s):  
United States ◽  
Cuticular Hydrocarbons ◽  
Bark Beetle ◽  
The United States ◽  
Roptrocerus Xylophagorum

The Eastern Larch Beetle, Another Threat to our Forests (Coleoptera: Scolytidae)

1989 ◽  
Vol 65 (4) ◽  
pp. 276-279 ◽  
Author(s):  
David W. Langor ◽  
Arthur G. Raske
Keyword(s):  
United States ◽  
North America ◽  
Key Words ◽  
Bark Beetle ◽  
The United States ◽  
Host Material ◽  
Larix Laricina ◽  
Northeastern North America ◽  
Dendroctonus Simplex ◽  
Damage Estimates

Isolated infestations of the eastern larch beetle, Dendroctonus simplex LeConte, have been reported in North America for over 100 years. Historically, this species has been considered a secondary pest of tamarack, Larix laricina (Du Roi) K. Koch, infesting only weakened or recently felled host material. However, recent widespread outbreaks of this bark beetle in northeastern North America and Alaska suggest that the species can be a primary killer of trees. More than 1.4 million m3 of tamarack was killed in the Atlantic provinces of Canada from 1976 to 1986. No damage estimates are available for Quebec and the United States. Fire, flooding, drought and defoliation by insects are often important agents predisposing tamarack to beetle attack and fostering localized build-up of D. simplex populations which then spread to healthy stands resulting in a widespread outbreak. Key Words: Dendroctonus simplex, bark beetle, outbreaks, damage appraisal, predisposing agents, tamarack.

Cuticular hydrocarbons of four populations ofCoptotermes formosanus Shiraki in the united states

1990 ◽  
Vol 16 (5) ◽  
pp. 1635-1647 ◽  
Author(s):  
Michael I. Haverty ◽  
Lori J. Nelson ◽  
Marion Page
Keyword(s):  
United States ◽  
Cuticular Hydrocarbons ◽  
The United States

Trap Lure Blend of Pine Volatiles and Bark Beetle Pheromones for Monochamus spp. (Coleoptera: Cerambycidae) in Pine Forests of Canada and the United States

2013 ◽  
Vol 106 (4) ◽  
pp. 1684-1692 ◽  
Author(s):  
Daniel R. Miller ◽  
Kevin J. Dodds ◽  
Andy Eglitis ◽  
Christopher J. Fettig ◽  
Richard W. Hofstetter ◽  
...  
Keyword(s):  
United States ◽  
Bark Beetle ◽  
The United States ◽  
Pine Forests

scholarly journals Visitor Preferences for Visual Changes in Bark Beetle-Impacted Forest Recreation Settings in the United States and Germany

2017 ◽  
Vol 61 (2) ◽  
pp. 209-223 ◽  
Author(s):  
Arne Arnberger ◽  
Martin Ebenberger ◽  
Ingrid E. Schneider ◽  
Stuart Cottrell ◽  
Alexander C. Schlueter ◽  
...  
Keyword(s):  
United States ◽  
Bark Beetle ◽  
The United States ◽  
Forest Recreation ◽  
Visitor Preferences ◽  
Recreation Settings ◽  
Visual Changes

scholarly journals Are Climates in Canada and the United States Suitable for the European Spruce Bark Beetle, Ips typographus, and Its Fungal Associate, Endoconidiophora polonica?

Forests ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1725
Author(s):  
Kishan R. Sambaraju ◽  
Chantal Côté
Keyword(s):  
Climate Change ◽  
United States ◽  
Bark Beetle ◽  
The United States ◽  
Ips Typographus ◽  
Climatic Suitability ◽  
Spruce Bark Beetle ◽  
Spruce Bark ◽  
Fungal Associate ◽  
European Spruce Bark Beetle

Invasions of exotic forest insects and pathogens can devastate evolutionarily naïve habitats and could cause irreversible changes to urban and natural ecosystems. Given the ever-increasing volume of trade in wood and plant stock worldwide, establishment of non-native pests under climate change is one of the most important forest health concerns currently. The European spruce bark beetle, Ips typographus, is a damaging, phloem-feeding insect of Norway spruce, Picea abies, in Eurasia. Endoconidiophora polonica is the most virulent ophiostomatoid fungal associate of I. typographus. Spruce species native to North America are susceptible to this insect-pathogen complex. We studied the suitability of ‘current’ (1970–2000) and future climates (2021–2100) in Canada and the United States for these two species via ensemble species distribution models. We also determined overlapping regions favorable to both I. typographus and E. polonica. Our results indicate that, currently, climate is particularly suitable for I. typographus and E. polonica in western Canada and throughout the United States. Northward shifts in climatic suitability are projected to occur in Canada for both species under climate change. By the end of the 21st century, a coast-to-coast corridor of climatic suitability for I. typographus and E. polonica will occur in Canada under high-temperature regimes.

Correlative microscopy in distrubuted (client/server) computing environments: tools for catalyzing the rapid dissemination of information about the cell biology of the human prostate

1995 ◽  
Vol 53 ◽  
pp. 682-683
Author(s):  
A. Hakam ◽  
J.T. Gau ◽  
M.L. Grove ◽  
B.A. Evans ◽  
M. Shuman ◽  
...  
Keyword(s):  
United States ◽  
Cell Biology ◽  
Tissue Bank ◽  
The United States ◽  
Prostate Adenocarcinoma ◽  
Correlative Microscopy ◽  
Client Server ◽  
Critical Elements ◽  
Transplant Organ

Prostate adenocarcinoma is the most common malignant tumor of men in the United States and is the third leading cause of death in men. Despite attempts at early detection, there will be 244,000 new cases and 44,000 deaths from the disease in the United States in 1995. Therapeutic progress against this disease is hindered by an incomplete understanding of prostate epithelial cell biology, the availability of human tissues for in vitro experimentation, slow dissemination of information between prostate cancer research teams and the increasing pressure to “ stretch” research dollars at the same time staff reductions are occurring.To meet these challenges, we have used the correlative microscopy (CM) and client/server (C/S) computing to increase productivity while decreasing costs. Critical elements of our program are as follows:1) Establishing the Western Pennsylvania Genitourinary (GU) Tissue Bank which includes >100 prostates from patients with prostate adenocarcinoma as well as >20 normal prostates from transplant organ donors.

Digital image acquisition, processing, and analysis in a polymer microscopy laboratory

1994 ◽  
Vol 52 ◽  
pp. 454-455
Author(s):  
Vinod K. Berry ◽  
Xiao Zhang
Keyword(s):  
United States ◽  
Image Analysis ◽  
Digital Image ◽  
Image Acquisition ◽  
Image Transmission ◽  
The United States ◽  
Quantitative Image Analysis ◽  
Quantitative Image

In recent years it became apparent that we needed to improve productivity and efficiency in the Microscopy Laboratories in GE Plastics. It was realized that digital image acquisition, archiving, processing, analysis, and transmission over a network would be the best way to achieve this goal. Also, the capabilities of quantitative image analysis, image transmission etc. available with this approach would help us to increase our efficiency. Although the advantages of digital image acquisition, processing, archiving, etc. have been described and are being practiced in many SEM, laboratories, they have not been generally applied in microscopy laboratories (TEM, Optical, SEM and others) and impact on increased productivity has not been yet exploited as well.In order to attain our objective we have acquired a SEMICAPS imaging workstation for each of the GE Plastic sites in the United States. We have integrated the workstation with the microscopes and their peripherals as shown in Figure 1.

Silence of the Land: On the Historical Irrelevance of Territory to Congressional Districting and Political Representation in the United States

2001 ◽  
Vol 15 (01) ◽  
pp. 53-87 ◽  
Author(s):  
Andrew Rehfeld
Keyword(s):  
United States ◽  
House Of Representatives ◽  
Political Representation ◽  
The United States ◽  
Representative Government ◽  
Congressional District ◽  
Congressional Districts ◽  
Communities Of Interest

Every ten years, the United States “constructs” itself politically. On a decennial basis, U.S. Congressional districts are quite literally drawn, physically constructing political representation in the House of Representatives on the basis of where one lives. Why does the United States do it this way? What justifies domicile as the sole criteria of constituency construction? These are the questions raised in this article. Contrary to many contemporary understandings of representation at the founding, I argue that there were no principled reasons for using domicile as the method of organizing for political representation. Even in 1787, the Congressional district was expected to be far too large to map onto existing communities of interest. Instead, territory should be understood as forming a habit of mind for the founders, even while it was necessary to achieve other democratic aims of representative government.

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