This document discusses pest invasions in major Brazilian crops. It describes how pests enter Brazil, often facilitated by human transport (65% of species). It then lists factors that allow pests to establish, including suitable environment, resources, and pest characteristics like large numbers and genetic variability. The document outlines the latency period when pest populations are low before outbreaks, and concludes by identifying major pests currently impacting crops in Brazil like soybean rust and Helicoverpa armigera.