RESUMO
Pythium deliense was isolated from rhizosphere soil and rhizoplane of healthy and infected corn roots. Rhizosphere and rhizoplane mycoflora isolated from the same sites were tested for their antagonism toward Pythium deliense in agar plates. Among the isolated fungi, Aspergillus terreus, Chaetomium globosum and Myrothecium verrucaria were chosen according to their antagonism on agar plates for experimentation to test their effectiveness for the biological control in either autoclaved or non-sterilized soil. Coating maize grains and roots with spores and mycelia of these three antagonists gave the germinating seeds and seedlings a very good protection from root-rot and pre-and post-emergence damping-off caused by P. Deliense. Applying these biocontrol agents to autoclaved and non-sterilized soil infested with P. deliense provided an excellent way of protection