ACADEMIA Letters Biocontrol of fungal plant diseases by Trichoderma sp strains. as an alternative for sustainable production. Some trials with good results in Argentina. Cecilia Mónaco, Centro de Investigaciones en Fitopatologia (CIDEFI). Facultad de Ciencias Agr. Y Ftales. UNLP. La Plata. (Buenos Aires, Argentina) Biocontrol of fungal plant diseases by Trichoderma sp strains. as an alternative for sus- tainable production. Some trials with good results in Argentina. Cecilia Mónaco Centro de Investigaciones en Fitopatologia (CIDEFI). Facultad de Ciencias Agr. Y Ftales. UNLP. La Plata. Buenos Aires. Argentina. cecilia.monaco7@gmail.com Within sustainable agriculture, biological control through the use of antagonistic microor- ganisms has become very relevant in recent years. This alternative has the advantage of being specifc and without risks to the environment. It includes the use of benefcial microorgan- isms which attack and control plant pathogens and the diseases they cause. Fungal species of the genus Trichoderma have been investigated as biological control agents for more than 70 years. These species are free-living, ubiquitous fungi that interact in the roots, soil and leaf environment, which act as biological control agents and whose antagonistic properties are based on the activation of very diverse mechanisms. Species of the genus Trichoderma are considered promising agents for biological control, because they act on a wide variety of pathogenic fungi. Within a family farming, the use of a low-cost production formula is proposed. In this sense, a bioproduct in the form of wettable powder was evaluated, to observe the efect of its incorporation into the soil in the planting line, and evaluate its concentration and permanence in the soil. To obtain the powder, tindalized rice grains were inoculated with a suspension of T. harzianum spores. Once colonized, it was left to dry under sterile airfow for 5 days and crushed with a cofee grinder. Once the powder Academia Letters, December 2021 Corresponding Author: Cecilia Mónaco, cecilia.monaco7@gmail.com Citation: Mónaco, C. (2021). Biocontrol of fungal plant diseases by Trichoderma sp strains. as an alternative for sustainable production. Some trials with good results in Argentina. Academia Letters, Article 4342. https://doi.org/10.20935/AL4342. 1 ©2021 by the author — Open Access — Distributed under CC BY 4.0