Establishment of Exenterus Spp. (Hymenoptera: Ichneumonidae), Parasites of the European Spruce Sawfly, Near Points of Introduction

1952 ◽  
Vol 84 (3) ◽  
pp. 76-86 ◽  
Author(s):  
W. A. Reeks
Keyword(s):  
United States ◽  
Biological Control ◽  
The United States ◽  
United States Bureau ◽  
Maritime Provinces ◽  
Imperial Institute ◽  
Entomological Laboratory

Several species of parasites have played an important part in the biological control of the European spruce sawfly, Gilpina hercyniae (Htg.), in the Maritime Provinces. Most of the parasites were collected in Europe by the Imperial Institute of Entomology (9), and some material was collected in Japan through the cooperation of the United States Bureau of Entomology. The parasites were reared or propagated by the Dominion Parasite Laboratory, Belleville, Ontario (12), and liberated by officers of the Dominion Entomological Laboratory, Fredericton, assisted by other government and company services.

The US Bureau of Efficiency: Not RIP in 1933?

Public Voices ◽  
2016 ◽  
Vol 8 (1) ◽  
pp. 44
Author(s):  
Mordecai Lee
Keyword(s):  
United States ◽  
Public Administration ◽  
The United States ◽  
United States Bureau ◽  
Efficient Management ◽  
The Us ◽  
Ongoing Support ◽  
Full Day

The United States Bureau of Efficiency (BOE), which had been established in 1916, was abolished in 1933 when President Hoover signed an omnibus appropriation bill on his last full day in office. Given Hoover's commitment to businesslike and efficient management and his ongoing support for the work of the Bureau throughout his presidency, what if he had acted differently and prevented its abolition? This fictional public administration history explores how Hoover could have kept BOE in existence and, if he had, how six of his successors might have treated the agency as part of their administrations.

Assessing the role of generalist predators in the biological control of alfalfa weevil (Coleoptera: Curculionidae)

2017 ◽  
Vol 149 (4) ◽  
pp. 525-533 ◽  
Author(s):  
Tatyana A. Rand
Keyword(s):  
United States ◽  
Biological Control ◽  
Experimental Work ◽  
United States Of America ◽  
Acyrthosiphon Pisum ◽  
The United States ◽  
Generalist Predators ◽  
Alfalfa Weevil ◽  
Exclusion Experiment ◽  
Predator Exclusion

AbstractAlfalfa weevil (Coleoptera:Curculionidae) is a major pest of alfalfa throughout the United States of America. Biological control research has disproportionately focussed on introduced parasitoids. Generalist predators may also be important, but experimental work evaluating their impacts is lacking. I combined a cross-site survey with a predator exclusion experiment to identify key predators, and test for impacts on weevil survival and plant defoliation levels in Montana and North Dakota, United States of America. Spiders (Araneae) dominated the complex, followed by Nabidae (Hemiptera) and Coccinellidae (Coleoptera). None of the dominant predators showed aggregative responses to weevil (Hypera postica (Gyllenhal); Coleoptera: Curculionidae) or pea aphid (Acyrthosiphon pisum (Harris); Hemiptera: Aphididae) densities across 10 sites surveyed. However, weevil densities were positively correlated with both coccinellid and nabid densities across transects at the experimental site. Thus, predator groups traditionally associated with aphids can show strong aggregative numerical responses to alfalfa weevil larvae at smaller scales. Predator exclusion revealed no significant predator effects on larval survival or alfalfa damage. However, final densities of pea aphids were significantly higher in exclusion treatments relative to controls. The results suggest that even under conditions where predators exert significant pressure on aphids, they may still have minimal impacts on weevils. Additional experimental work is necessary to determine the broader potential of generalist predators as alfalfa weevil control agents.

Discussion of “Upward Pressures under Dams: Experiments by the United States Bureau of Reclamation”

1929 ◽  
Vol 93 (1) ◽  
pp. 1551-1580
Author(s):  
E. L. Chandler ◽  
B. F. Jakobsen ◽  
Charles Terzaghi ◽  
J. C. Stevens ◽  
F. W. Hanna ◽  
...  
Keyword(s):  
United States ◽  
The United States ◽  
United States Bureau ◽  
Bureau Of Reclamation

THE UNITED STATES BUREAU OF EDUCATION

Science ◽  
1909 ◽  
Vol 30 (764) ◽  
pp. 235-236
Author(s):  
E. E. Brown
Keyword(s):  
United States ◽  
The United States ◽  
United States Bureau
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