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Modern Applied Statistics With S

https://www.thelancet.com/pdfs/journals/lancet/PIIS0140-6736(09)60829-1.pdf

Human African trypanosomiasis

Diffusion and ecological problems : mathematical models

‘‘Gentlemen don’t need mistletoe’’ said the Christmas whiskey billboard I saw recently in Florida, a garish reminder of how much mistletoe lore is embedded in western society. Mistletoe The Genus Viscum, one in the series of medicinal and aromatic plants for industry and academic researchers, centers on the mistletoe in this advertisement, the common European mistletoe,Viscum album. There are helpful discussions on African, Asian, and Argentine mistletoes and their uses but the corpus of the book deals with V. album. Viscum album, considered sacred by the Druids, is no doubt the most widely used parasitic angiosperm for various health concoctions. As a result, much has been learned about its biochemistry and pharmaceutical potential. A great deal of the work on the culture and utilization ofV. album has been done by investigators at Institute Hiscia Center for Cancer Research in Switzerland where votaries of Rudolf Steiner’s distinct form of homeopathy have used mistletoe extracts (‘‘Iscador’’) for many years in cancer treatment. Mistletoe collected from less common hosts are considered to have greater efficacy in preparation of Iscador. As a result, there is a helpful chapter on culturing V. album which is not as difficult as might be imagined for an obligate parasite. Most of the chapters deal with the medicinal aspects of mistletoe including toxicology, clinical aspects, chemistry, and biochemistry emphasizing the lectins which are one of the more desirable compounds produced by the parasite. I found the treatment by Bu ̈ssing (Biological and pharmacological properties of Viscum album L.) helpful because it reviews the link between folk and modern medicine. However, several relevant papers were omitted which are included in a recent excellent review of mistletoes (Watson 2001). Like many books with a diversity of authors, the quality of chapters varies. Obviously produced as a reference volume, Mistletoe lacks an extensive index. Especially aggravating is the lack of an author’s index, limiting the value of the book for anyone looking for specific papers. These days, $70 for a hardbound monograph is reasonable. Color images are well-produced but some of the black and white figures are blurry in my copy. This volume will be of value to ethnobotanists, anyone interested in alternative medicines, and students of mistletoes and parasitic plants. LITERATURE CITED

Genetic Data Analysis II. Methods for Discrete Population Genentic Data

Seminal fluid proteins (SFPs) produced in reproductive tract tissues of male insects and transferred to females during mating induce numerous physiological and behavioral postmating changes in females. These changes include decreasing receptivity to remating; affecting sperm storage parameters; increasing egg production; and modulating sperm competition, feeding behaviors, and mating plug formation. In addition, SFPs also have antimicrobial functions and induce expression of antimicrobial peptides in at least some insects. Here, we review recent identification of insect SFPs and discuss the multiple roles these proteins play in the postmating processes of female insects.

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Insect seminal fluid proteins: identification and function.

An area-wide integrated tsetse eradication project was initiated in Zanzibar in 1994 by the International Atomic Energy Agency and the governments of Tanzania and Zanzibar, to eradicate Glossina austeni Newstead from Unguja Island (Zanzibar) using the sterile insect technique. Suppression of the tsetse population on Unguja was initiated in 1988 by applying residual pyrethroids as a pour-on formulation to livestock and by the deployment of insecticide impregnated screens in some of the forested areas. This was followed by sequential releases of gamma-sterilized male flies by light aircraft. The flies, packaged in carton release containers, were dispersed twice a week along specific flight lines separated by a distance of 1–2 km. More than 8.5 million sterile male flies were released by air from August 1994 to December 1997. A sterile to indigenous male ratio of >50:1 was obtained in mid-1995 and it increased to >100:1 by the end of 1995. As a consequence the proportion of sampled young females (1–2 ovulations), with an egg in utero in embryonic arrest or an uterus empty as a result of expulsion of a dead embryo, increased from 70% in the last quarter of 1995. In addition, the age structure of the female population became significantly distorted in favor of old flies (≥4 ovulations) by the end of 1995. The apparent density of the indigenous fly population declined rapidly in the last quarter of 1995, followed by a population crash in the beginning of 1996. The last trapped indigenous male and female flies were found in weeks 32 and 36, 1996, respectively. Time for 6 fly generations elapsed between the last catch of an indigenous fly and the end of the sterile male releases in December 1997.

https://bioone.org/journals/journal-of-economic-entomology/volume-93/issue-1/0022-0493-93.1.123/Glossina-austeni-Diptera--Glossinidae-Eradicated-on-the-Island-of/10.1603/0022-0493-93.1.123.pdf

Glossina austeni (Diptera: Glossinidae) eradicated on the island of Unguja, Zanzibar, using the sterile insect technique.

Area-wide control of insect pests: from research to field implementation.

Integrated pest management (IPM) has remained the dominant paradigm of pest control for the last 50 years. IPM has been endorsed by essentially all the multilateral environmental agreements that have transformed the global policy framework of natural resource management, agriculture, and trade. The integration of a number of different control tactics into IPM systems can be done in ways that greatly facilitate the achievement of the goals either of field-by-field pest management, or of area-wide (AW) pest management, which is the management of the total pest population within a delimited area. For several decades IPM and AW pest control have been seen as competing paradigms with different objectives and approaches. Yet, the two “schools” have gradually converged, and it is now generally acknowledged that the synthesis, AW-IPM, neither targets only eradication, nor relies only on single control tactics, and that many successful AW programmes combine a centrally managed top-down approach with a strong grassroots bottom-up approach, and that some are managed in a fully bottom-up manner. AW-IPM is increasingly accepted especially for mobile pests where management at a larger scale is more effective and preferable to the uncoordinated field-by-field approach. For some livestock pests, vectors of human diseases, and pests of crops with a high economic value and low pest tolerance, there are compelling economic incentives for participating in AW control. Nevertheless issues of free riders, public participation and financing of public goods, all play a significant role in AW-IPM implementation. These social and managerial issues have, in several cases, severely hampered the positive outcome of AW programmes; and this emphasises the need for attention not only to ecological, environmental, and economic aspects, but also to the social and management dimensions. Because globalization of trade and tourism are accompanied by the increased movement of invasive alien pest species, AW programmes against major agricultural pests are often being conducted in urban and suburban areas. Especially in such circumstances, factors likely to shift attitudes from apathy to outrage, need to be identified in the programme planning stage and mitigated. This paper reviews the evolution and implementation of the AW-IPM concept and documents its process of development from basic research, through methods development, feasibility studies, commercialization and regulation, to pilot studies and operational programmes.

/pdf/area-wide-control-of-insect-pests-42z821h6ov.pdf

Area-Wide Control of Insect Pests

With the global burden of mosquito-borne diseases increasing, and some conventional vector control tools losing effectiveness, the sterile insect technique (SIT) is a potential new tool in the arsenal. Equipment and protocols have been developed and validated for efficient mass-rearing, irradiation and release of Aedines and Anophelines that could be useful for several control approaches. Assessment of male quality is becoming more sophisticated, and several groups are well advanced in pilot site selection and population surveillance. It will not be long before SIT feasibility has been evaluated in various settings. Until perfect sexing mechanisms exist, combination of Wolbachia-induced phenotypes, such as cytoplasmic incompatibility and pathogen interference, and irradiation may prove to be the safest solution for population suppression.

Marc J. B. Vreysen

Papers

Glossina austeni (Diptera: Glossinidae) eradicated on the island of Unguja, Zanzibar, using the sterile insect technique.

Area-wide control of insect pests: from research to field implementation.

Area-Wide Control of Insect Pests

Back to the future: the sterile insect technique against mosquito disease vectors.

Area-wide integrated pest management (AW-IPM): principles, practice and prospects.