Visar resultat för..."Fjärilarne Alfred"

Plant bugs—Miridae, the largest family of the Heteroptera, or true bugs—are globally important pests of crops such as alfalfa, apple, cocoa, cotton, sorghum, and tea. Some also are predators of crop pests and have been used successfully in biological control. Certain omnivorous plant bugs have been considered both harmful pests and beneficial natural enemies of pests on the same crop, depending on environmental conditions or the perspective of an observer.As high-yielding varieties that lack pest resistance are planted, mirids are likely to become even more important crop pests. They also threaten crops as insecticide resistance in the family increases, and as the spread of transgenic crops alters their populations. Predatory mirids are increasingly used as biocontrol agents, especially of greenhouse pests such as thrips and whiteflies. Mirids provide abundant opportunities for research on food webs, intraguild predation, and competition.Recent worldwide activity in mirid systematics and biology testifies to increasing interest in plant bugs. The first thorough review and synthesis of biological studies of mirids in more than 60 years, Biology of the Plant Bugs will serve as the basic reference for anyone studying these insects as pests, beneficial IPM predators, or as models for ecological research.

Imagine scientists controlling the transmission of certain diseases through the genetic modification of mosquitoes. Eradicating harmful insects without the use of pesticides. Or increasing the fertility of some insects who in turn eat harmful arthropods or even a plant pathogen. Those are just a few of the real-world applications of insect transgenesis, which offers substantial benefits to humankind-whether it be in improving agricultural productivity or reducing the spread of insect-vectored diseases.Insect Transgenesis: Methods and Applications is the first publication to describe in a comprehensive manner the various methodologies available, possible applications, and the risk assessment and regulatory issues involved in this fascinating area of research.Divided into several areas of interest, the book starts with an overview of the history and methodology of insect gene transfer. The book then examines gene targeting by homologous recombination and recombination systems, and systems for transgenic selection, including visible eye color markers, chemical resistance, and fluorescent proteins. Other sections consider the use of various vector systems to integrate DNA into a host genome or to express foreign genes in a host organism.The work concludes with strategies for the use of transgenic insects, including examples for agricultural pests and vectors of disease. Of particular interest are the final chapters that discuss risk assessment considerations and governmental regulatory procedures for the transport and release of transgenic insects.

Imagine scientists controlling the transmission of certain diseases through the genetic modification of mosquitoes. Eradicating harmful insects without the use of pesticides. Or increasing the fertility of some insects who in turn eat harmful arthropods or even a plant pathogen. Those are just a few of the real-world applications of insect transgen

This early work by Alfred Russel Wallace was originally published in 1853 and we are now republishing it with a brand new introductory biography. ''On the Habits of the Butterflies of the Amazon Valley'' is a short article that details some of Wallace''s entomological observations he noted during his four year exploration of the Amazon. Alfred Russel Wallace was born on 8th January 1823 in the village of Llanbadoc, in Monmouthshire, Wales. Wallace was inspired by the travelling naturalists of the day and decided to begin his exploration career collecting specimens in the Amazon rainforest. He explored the Rio Negra for four years, making notes on the peoples and languages he encountered as well as the geography, flora, and fauna. While travelling, Wallace refined his thoughts about evolution and in 1858 he outlined his theory of natural selection in an article he sent to Charles Darwin. Wallace made a huge contribution to the natural sciences and he will continue to be remembered as one of the key figures in the development of evolutionary theory.

This early work by Alfred Russel Wallace was originally published in 1870 and we are now republishing it with a brand new introductory biography. ''The Malayan Papilionidæ or Swallow-tailed Butterflies, as Illustrative of the Theory of Natural Selection'' is an article describing Wallace''s evidence for the processes of natural selection. Alfred Russel Wallace was born on 8th January 1823 in the village of Llanbadoc, in Monmouthshire, Wales. Wallace was inspired by the travelling naturalists of the day and decided to begin his exploration career collecting specimens in the Amazon rainforest. He explored the Rio Negra for four years, making notes on the peoples and languages he encountered as well as the geography, flora, and fauna. While travelling, Wallace refined his thoughts about evolution and in 1858 he outlined his theory of natural selection in an article he sent to Charles Darwin. Wallace made a huge contribution to the natural sciences and he will continue to be remembered as one of the key figures in the development of evolutionary theory.

Arctic and Subarctic North America is particularly affected by climate change, where average temperatures are rising three times faster than the global average. Documenting the changing climate/environment of the north requires a structured knowledge of indicator taxa that reflect the effects of climate changes.Aleocharine beetles are a dominant group of forest insects, which are being used in many projects as indicators of environmental change. Many species are forest specialists restricted to certain microhabitats, some are generalists and others are open habitat specialists. They represent many ecological niches and, as such, are good indicators for many other species as well. The majority of Canadian aleocharine beetle species (about 600 spp.) has been studied and published by Jan Klimaszewski et al. (2018, 2020), mainly from southern, central, and western Canada, while the northern taxa remain poorly known and documented. The aim of the presentbook is to summarize the knowledge on this insect group in the Arctic and Subarctic North America and to provide a diagnostic and ecological tool for scientists studying and monitoring insects in northern Canada and Alaska. The book includes a review of the literature, information on 238 species and their habitats, taxonomic review, images, and identification tools.

Arctic and Subarctic North America is particularly affected by climate change, where average temperatures are rising three times faster than the global average. Documenting the changing climate/environment of the north requires a structured knowledge of indicator taxa that reflect the effects of climate changes.Aleocharine beetles are a dominant group of forest insects, which are being used in many projects as indicators of environmental change. Many species are forest specialists restricted to certain microhabitats, some are generalists and others are open habitat specialists. They represent many ecological niches and, as such, are good indicators for many other species as well. The majority of Canadian aleocharine beetle species (about 600 spp.) has been studied and published by Jan Klimaszewski et al. (2018, 2020), mainly from southern, central, and western Canada, while the northern taxa remain poorly known and documented. The aim of the presentbook is to summarize the knowledge on this insect group in the Arctic and Subarctic North America and to provide a diagnostic and ecological tool for scientists studying and monitoring insects in northern Canada and Alaska. The book includes a review of the literature, information on 238 species and their habitats, taxonomic review, images, and identification tools.