1 Diapause and Related Phenomena in Culex Mosquitoes: Their Relation to Arbovirus Disease Ecology.- Terminology and Characteristics of Diapause.- Methods.- Diapause Occurrence in Culex Species.- Diapause Induction.- Diapause Maintenance.- Diapause Termination.- Autogeny.- Overwinter Survival of Arboviruses.- Summary and Conclusions.- References.- 2 New World Vectors of the Leishmaniases.- Classification of American Phlebotominae and Leishmania.- Development of Leishmania in Sand Flies.- Incrimination of Vectors.- Geographic Distribution of Vectors.- Some Habits of Sand Flies as Related to Leishmaniasis Transmission.- Lutzomyia Vectors and Associated Leishmania.- Concluding Remarks.- References.- 3 Whitefly Transmission of Plant Viruses.- Geminiviruses.- Carlaviruses.- Closteroviruses.- Viruses with Possible Relationships to the Potyviruses.- Viruses with Possible Relationships to the Luteoviruses.- Rod-Shaped DNA Viruses.- Viruses with Possible Relationships to the Nepoviruses.- Whitefly-Transmitted Viruses with Unknown Relationships.- References.- 4 Virus-Membrane Interactions Involved in Circulative Transmission of Luteoviruses by Aphids.- Characteristics of Luteoviruses.- The Route of Luteoviruses Through Aphid Vectors.- Observations of Luteovirus Acquisition.- Observations of Luteovirus Transmission.- Discussion.- Future Perspectives.- References.- 5 Ecology and Evolution of Leafhopper-Grass Host Relationships in North American Grasslands.- Methods.- Patterns in Cicadellid Host Selection.- Cicadellid Components of Grassland Guilds.- Evolution of Cicadellid Host Selection.- Conclusion.- Summary.- References.- 6 Feeding Strategies and the Guild Concept Among Vascular Feeding Insects and Microorganisms.- Xylem Feeders.- Phloem Feeders.- Mesophyll Feeders.- Overlap Between Feeding Modes.- Vascular Prokaryotes: Guild Members?.- Summary.- References.
Current Topics in Vector Research is based on the premise that to un derstand the whole, one must first understand the component parts and how they interact. Here in Volume 4, as well as in future volumes, vector, pathogen, and host will be treated both individually and as integral parts of multifaceted transmission systems. It is our intention to present up-to date, coherent syntheses of the latest findings in vector research, suggest promising frontiers for future research, and call attention to possible prac tical applications of our present understandings of pathogen-vector-host interactions. To realize our goals, we invite world-renowned, veteran sci entists as well as neophytes to report on their individual areas of expertise. Where appropriate, authors are encouraged to draw conclusions and pro pose hypotheses that stimulate additional thinking and research or oth erwise further our understanding of vector transmission cycles and how such cycles might be interrupted. It is our hope that readers will agree that we are serving these objectives and creating a milieu for specialists and generalists in vector research to maintain rapport and understanding.
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