This publication provides a section which gives a brief description of the various offices within the United States Department of Agriculture and their functions, followed by a directory, and an Index of Names.

This story book tells how to get rid of these robber ticks that bite cattle and suck their blood. The best way to fight ticks is to build dipping vats and make the cattle swim through a medicine that kills the ticks. The medicine doesn't hurt the cattle at all. (Foreword by J.R. Mohler, Chief, Bureau of Animal Industry).

"How to control economically important vector-borne diseases? What are the best strategies to protect livestock from vector-borne diseases in a changing environment? How to evaluate and assess the acceptability, cost efficiency and cost benefit of the control and surveillance methods? The information in this book will help to answer these questions. It aims at presenting the latest information on vector-borne diseases affecting livestock worldwide, from state-of-the art interventions to the assessment of the impact of these control measures. This book is a valuable tool for entomologists and all those involved in pest and vector control."

Most of the future increase in livestock production is expected to occur in the tropical and subtropical regions of the world. Cattle are the most numerous of the ruminant species in the tropics and provide the largest quantity of animal food products. More than one-third of the world's cattle are found in the tropics. Disease is the major factor which prohibits full utilization of these regions for cattle production. Various infectious and transmissible viral, rick ettsial, bacterial, and particularly protozoan and helminthic diseases, are widespread in the tropics and exert a heavy toll on the existing cattle industry there. This uncontrolled disease situation also discourages investment in cattle industries by private and government sectors. In Africa alone, it is estimated that 125 million head of cattle could be accommodated in the tropical rainbelt if the disease and other animal husbandry factors could be resolved. The potential of efficient cattle production under more favorable conditions prompted various international agencies to establish a multi million dollar International Laboratory for Research in Animal Diseases (ILRAD) in Nairobi, Kenya, Africa. In South America, principal sites for raising cattle are shifting to the savannah lands because the more fertile soils are being used for crop produc tion, however, in the savannahs also, disease remains the most powerful deterrent in implementing the cattle industry.