**Abstract**

*Capsicum* from tropical and subtropical America, is an important genus for the nutritional, economic and cultural values of its species. At the same time, the *Capsicum* species are affected by diseases caused by viruses, bacteria, fungi and pseudofungi, in particular the oomycete *Phytophthora capsici*. This phytopathogen causes great damage and losses in different *Capsicum* species, because it infects all plant organs causing root, crown and fruit rot; and, leaf blight. The polycyclic dispersion through zoospores and sporangia, the limited availability of resistant genotypes, and the reduced diversity of effective oomyceticides (fungicides), make *P. capsici* one of the most complex phytopathogens to be managed worldwide specially in field conditions. However, successful management of *P. capsici* depends on the knowledge of the pathogen, its interaction with the susceptible host and the methods of control used. Thus, this chapter addressed the etiology, symptomatology, occurrence and management of the disease. Additionally, the cycle of the disease is discussed in a holistic and simple way.

**Keywords:** *Capsicum* spp., root and crown rot, leaf blight, fruit rot, *Phytophthora capsici* cycle, disease management
