scholarly journals Seasonal variability in bed-bug (Cimex lectularius) activity in Western Europe, the United States, and Australia using search engine query data as a surrogate outbreak measure

2016 ◽  
Vol 75 (3) ◽  
pp. 627-629
Author(s):  
Jonathan Kantor
Author(s):  
Xianhui Shi ◽  
Changlu Wang ◽  
James E Simon ◽  
William Reichert ◽  
Qingli Wu

Abstract The common bed bug, Cimex lectularius L., resurged as an important urban pest in the last 20 yr. Yet, there are no commercial repellent products labeled for bed bugs available in the United States. We evaluated the repellency of two catnip oils from newly developed cultivars, CR3 and CR9, and compared each to 10 and 25% N,N-diethyl-meta-toluamide (DEET). CR3 contains 63.4% E,Z-nepatalactone and 27.5% Z,E-nepatalactone, and CR9 contains 94.9% Z,E-nepatalactone. Arena studies showed that CR3 and CR9 oils were more effective than DEET within a 24-h period. At 10% concentration, both CR3 and CR9 oils exhibited a repellency of over 94% during the first 8 h. At 25% concentration, the repellency of CR3 and CR9 oils increased to 100%, and repellency of DEET was 92% during the first 24 h. Repellency of 25% CR3 and CR9 oils became lower than 25% DEET after being aged for 3 d. After 28-d aging, repellency of 25% CR3, CR9, and DEET reduced to 25, 64, and 92%, respectively. Soiled socks were placed above repellent treated bands to determine if the repellent can protect soiled socks from being infested. The 20% CR3 oil prevented 100% of bed bugs from infesting soiled socks showing that it was more effective than DEET. These results indicate that catnip oils from CR3 and CR9 cultivars are more repellent than DEET over a 24-h period following application, but their longevity is shorter than DEET after 72 h.


2015 ◽  
Vol 43 (S2) ◽  
pp. 7-11
Author(s):  
Jennifer S. Bard

Bedbugs are tiny, wingless insects which feed on mammal blood and leave behind painful, itchy sores. Although they can live in other settings, they are most commonly found in warm, dark places inhabited by humans, like beds. After being absent in the United States for over 60 years, thanks to powerful pesticides, bed bugs (Cimex lectularius), have returned in force and are present in every state and nearly every city. For reasons not entirely understood, bed bugs have developed resistance to traditional pesticides such as Permethrin and are therefore difficult to control. Although commonly believed to be associated with dirty housekeeping and associated with substandard housing, bed bugs are equally likely to be present in five-star hotels as they are in homeless shelters.


1991 ◽  
Vol 30 (2) ◽  
pp. 213-217
Author(s):  
Mir Annice Mahmood

Foreign aid has been the subject of much examination and research ever since it entered the economic armamentarium approximately 45 years ago. This was the time when the Second World War had successfully ended for the Allies in the defeat of Germany and Japan. However, a new enemy, the Soviet Union, had materialized at the end of the conflict. To counter the threat from the East, the United States undertook the implementation of the Marshal Plan, which was extremely successful in rebuilding and revitalizing a shattered Western Europe. Aid had made its impact. The book under review is by three well-known economists and is the outcome of a study sponsored by the Department of State and the United States Agency for International Development. The major objective of this study was to evaluate the impact of assistance, i.e., aid, on economic development. This evaluation however, was to be based on the existing literature on the subject. The book has five major parts: Part One deals with development thought and development assistance; Part Two looks at the relationship between donors and recipients; Part Three evaluates the use of aid by sector; Part Four presents country case-studies; and Part Five synthesizes the lessons from development assistance. Part One of the book is very informative in that it summarises very concisely the theoretical underpinnings of the aid process. In the beginning, aid was thought to be the answer to underdevelopment which could be achieved by a transfer of capital from the rich to the poor. This approach, however, did not succeed as it was simplistic. Capital transfers were not sufficient in themselves to bring about development, as research in this area came to reveal. The development process is a complicated one, with inputs from all sectors of the economy. Thus, it came to be recognized that factors such as low literacy rates, poor health facilities, and lack of social infrastructure are also responsible for economic backwardness. Part One of the book, therefore, sums up appropriately the various trends in development thought. This is important because the book deals primarily with the issue of the effectiveness of aid as a catalyst to further economic development.


Geography ◽  
2006 ◽  
Vol 91 (3) ◽  
pp. 218-226 ◽  
Author(s):  
Heike C. Alberts ◽  
Julie L. Cidell

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