This book has two components; Entomology and remote sensing, which act as a nucleus for further studies in tackling the integration of these two components as a package for monitoring the damage of tree locust on Acacia senegal tree, to be familiar with this subject and its application, it requires knowledge about computer, remote sensing, geographic information technology, ground positioning system and pests science. In this study some questions are raised to be answered: - What are the impacts of tree locust (Anacridium m. melanorhodon) on Gum Arabic production? - Which is the most effective method of remote sensing capable of recognition of tree locust defoliation? - To what extent can remote sensing be a complete substituent to ground surveys? The book aimed to investigate the role of both ground survey and remote sensing in monitoring the damage of tree locust pest that inflected on Acacia senegal tree and it's qualitative and quantitative impact on the gum produced