grafting susceptible trees with resistant genotypes, and in a few cases biological control. Since 1999, CEPLAC, the institute responsible for cacao research and extension in Brazil, has been producing on a pilot scale a product known as ‘Tricovab’, based on a conidial preparation of T. stromaticum grown on rice grains (De Souza et al., 2006). T. stromaticum was shown to be an efficient mycoparasite of M. perniciosa (Bastos, 1996; Costa et al., 1996). Dead brooms and old infected pods are colonized by T. stromaticum that parasitizes the mycelia of M. perniciosa causing an acceleration in the decomposition of the dead infected tissues, leading to a reduction on basidiocarp production, and consequently on the basidiospore inoculum levels (Hjorth et al., 2003).