This is a practical manual, which sets forth the main groups of insects and arachnids that contribute towards the natural limitation of vine pests; and where conservation practices are also discussed, aimed at maximizing its activity. This manual was prepared under the dissemination activities of the project ECOVITIS - Maximizing vineyard ecosystem services, developed by ADVID in partnership with the Real Companhia Velha, with Sogevinus Fine Wines SA, and with the UTAD.