The present investigations evaluated the biological control
activity of eight monoconidial isolates of Trichoderma originating
from the rhizosphere of avocado trees and previously selected
(Ruano Rosa, 2006) on the basis of in vitro antagonism to R. necatrix.
In these experiments, Trichoderma isolates were applied singly
or in combinations and evaluated for their capacity to control avocado
white root rot. Isolates were also evaluated for in vitro
incompatibility.