Energy Metabolism in Insects
Energy Metabolism in Insects

Author: Roger G. H. Downer

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 251

ISBN-13: 1461592216

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The scientific program for the XVI International Congress of Entomology, held in Kyoto, Japan August 3-9, 1980 included a symposium on the subject of "Energy Metabolism and Its Regulation in Insects." The symposium provided an opportunity to integrate knowledge, and focus attention, on an important and fundamental aspect of insect biochemis try/physiology. The energy metabolism of insects differs from that of other animals in a variety of ways, including the prodigious amounts of energy expended by flying insects, the presence in hemolymph of large concentrations of sugar in the form of the nonreducing disaccharide tre halose, the transport of fat in the form of diacylglycerol, and the periodic mobilization and deposition of cuticular components during development. These differences, together with hormones, neurohormones, and neu rotransmitters that are specific to (or functionally different in) insects, serve to demonstrate the unique nature of energy metabolism in insects. An obvious corollary from the demonstrated uniqueness of insect energy metabolism is that an understanding of the process may lead to the de velopment of new, specific agents or strategies for the suppression of insect pests. The present volume is an expanded version of the Kyoto symposium.

Metabolic Aspects Of Lipid Nutrition In Insects
Metabolic Aspects Of Lipid Nutrition In Insects

Author: T. E. Mittler

Publisher: CRC Press

Published: 2019-03-01

Total Pages: 222

ISBN-13: 0429724772

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Our understanding of the physiological function of insect essential lipids has long been flawed by major uncertainties. It was discovered long ago that dietary sterol is a necessary nutrient for all insects, which radically sets them apart from the vertebrates in terms of qualitative nutrient requirements. Because of the physiological importance of sterol as a molting hormone precursor in insects and the implications of this for the development of new insecticides, a wealth of investigation into insect sterol metabolism followed, covering both the ways in which insects convert diverse food-plant sterols into the major tissue sterols and how these in turn are metabolized into the ecdysone molting hormones. However, for the classes or essential Lipid nutrients required by vertebrates, research dealing with insects has been scant and, more often than not, rather indeterminate. Many, but by no means all, insects studied appear to require essential fatty acids, though virtually nothing has been found out about the metabolism or essential physiological function of these acids. Excepting vitamin A, needed for insect vision, the various vertebrate fat-soluble vitamins appear to have no significance for insect physiology, and results of the occasional attempts to demonstrate functions for them in growth and development have in most cases been tantalizingly equivocal. In recent years some notable advances were made in tne study or essential fatty acids and fat-soluble vitamins in insects, and work on insect sterol nutrition and metabolism continues with ever-increasing sophistication. The contributors to this book summarize, discuss, and speculate on these issues. Their work is based on papers presented at the 1980 World Congress of Entomology at Kyoto, Japan.

Hormones and Metabolism in Insect Stress
Hormones and Metabolism in Insect Stress

Author: Jelisaveta Ivanovic

Publisher: CRC Press

Published: 2018-01-31

Total Pages: 184

ISBN-13: 1351081683

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This book discusses the effects of both natural (e.g., temperature, humidity, and lack of food) and man-induced stressors (e.g., pollution) on insects. Insect neurohormones and metabolism are emphasized, although all aspects of insect biology are examined. The role of ecdysteroids and juvenile hormones in response to thermal and other stressors is featured, and population studies in insect stress are presented. Entomologists, ecologists, ecophysiologists, physiologists, applied entomologists and others will find Hormones and Metabolism in Insect Stress an important reference resource.

Measurement of Ion Transport and Metabolic Rate in Insects
Measurement of Ion Transport and Metabolic Rate in Insects

Author: T.J. Bradley

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 241

ISBN-13: 1461382394

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Insects as a group occupy a middle ground in the biosphere between bacteria and viruses at one extreme, amphibians and mammals at the other. The size and general nature of insects present special problems to the student of entomology. For example, many commercially available instruments are geared to measure in grams, while the forces commonly encountered in stUdying insects are in the milligram range. Therefore, techniques developed in the study of insects or in those fields concerned with the control of insect pests are often unique. Methods for measuring things are common to all sciences. Advances sometimes depend more on how something was done than on what was measured; indeed a given field often progresses from one technique to another as new methods are discovered, developed, and modified. Just as often, some of these techniques find their way into the classroom when the problems involved have been sufficiently ironed out to permit students to master the manipulations in a few laboratory periods. Many specialized techniques are confined to one specific research laboratory. Although methods may be considered commonplace where they are used, in another context even the simplest procedures may save considerable time. It is the purpose of this series (1) to report new developments in methodology, (2) to reveal sources of groups who have dealt with and solved particular entomological problems, and (3) to describe experiments which may be applicable for use in biology laboratory courses.

Insecticides
Insecticides

Author: R. D. O'Brien

Publisher: Academic Press

Published: 2014-06-28

Total Pages: 347

ISBN-13: 1483270688

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Insecticides: Action and Metabolism provides a comprehensive review of the action of insecticides and a survey of their metabolism. This book discusses the toxicology of insecticides. Organized into 17 chapters, this book begins with an overview of the mechanisms whereby toxicants exert their effects. This text then discusses the insecticidal action of organophosphates, which is described as the toxic organic compounds containing phosphorus. Other chapters consider the mode of action of organophosphates by inhibiting cholinesterase with consequent disruption of nervous activity caused by accumulation of acetylcholine at nerve endings. This book discusses as well the erratic patterns of selective toxicity to insects of the carbamates. The final chapter deals with the real hazard to human health as well as the effects upon wild life of insecticides and chlorinated pesticides. This book is a valuable resource for organic and agricultural chemists, as well as biologists, agriculturists, neurophysiologists, environmental scientists, and research workers.