Exotic Plant Pests and North American Agriculture examines the threat posed by exotic pests introduced to North American agriculture. It considers the impact of introduced pests on humans, and it highlights the need for intensified research efforts and international cooperation to prevent further introductions. Organized into 17 chapters plus an epilogue, this volume begins with a historical overview of pest introductions, including insects and mites, and possible introductions in the future. It then discusses the impact of introduced weeds in North America; ecology and genetics of exotic species; how to detect and stop pest introductions; and research on exotic insects, plant pathogens, and weeds. The reader is also introduced to the use of exotic natural enemies for biological control of exotic pests, prediction of potential epidemics caused by exotic pests, insurance against exotic plant pathogens, and international cooperation on controlling exotic pests. Scientists, plant pathologists, ecologists, and those working in academics, government research laboratories, and regulatory agencies will benefit from reading this book.

First multi-year cumulation covers six years: 1965-70.

For many years the use of chemical agents such as pesticides and herbicides has been effective in controlling the many varieties of pests that infest both agricultural crops and backyard gardens. However, these pests are gradually becoming resistant to these agents, because the agents themselves are acting as selective factors making the pests better and better able to resist and persist. As a result, the use of biological controlling agents is increasing. This book is a comprehensive and authoritative handbook of biological control.

The role of arthropods in forest ecosystems is poorly understood. Yet such knowledge may be critical in order to explain fully the fundamental forces that shape the structure and regulate the functioning of such ecosys tems. There are numerous hypotheses about the roles of various arthropods, but few, if any, of these hypotheses have been rigorously tested. Some, however, have been repeated so often and so widely that they are now accept ed by many as unequivocal fact. Nothing could be further from the truth. Forest arthropods which derive most of their sustenance from plants are usually specially adapted for feeding in one of three subsystems-the above-ground plant system, the soil-litter system, or the aquatic stream system. Plant-feeding arthropods in the soil-litter and stream systems are primarily saprophous although many consume significant amounts of microorganisms. Research on the role of arthropods in each of these three subsystems has historically been provincial. Until very recently there has been little effort to collate, assimilate, and syn thesize the plethora of findings in even one of these systems-rnuch less all three. This Symposium (at the 15th International Congress of Entomology, Washington, D.C. August 19-27, 1976) was organized for the specific pur pose of promoting scientific synthesis. It fulfills one of the first requirements in such endeavors; namely, the juxtapositioning of current knowledge and hypotheses so that similarities can be perceived, insights can be de rived, and more elaborate conceptual constructs can be built.

First multi-year cumulation covers six years: 1965-70.