TY - JOUR AU - URÍAS-GARCÍA, Crescencio AU - PEREZ ALVAREZ, Sandra AU - HÉCTOR-ARDISANA, Eduardo F. AU - FLORES CÓRDOVA, María A. PY - 2022/11/29 Y2 - 2024/03/29 TI - Promotion of tomato growth by Trichoderma sp. under shade mesh conditions JF - Notulae Botanicae Horti Agrobotanici Cluj-Napoca JA - Not Bot Horti Agrobo VL - 50 IS - 4 SE - Research Articles DO - 10.15835/nbha50312962 UR - https://www.notulaebotanicae.ro/index.php/nbha/article/view/12962 SP - 12962 AB - <p>Chemical fertilizers are frequently used in agriculture with harmful effects on ecological components, so the use of microorganisms as growth regulators is an agricultural practice increasingly used today. The aim of this research was to evaluate <em>Trichoderma</em> sp. as growth regulator in tomato plants. <em>Trichoderma</em> sp. isolated from soils was grown on solid PDA medium for morphological characterization of the fungus. An experiment to analyse the interaction between <em>Trichoderma</em> sp. and shade mesh conditions was established, where: T1 = <em>Trichoderma</em> sp.; T2 = without <em>Trichoderma</em> sp. (fertilization recommended for the crop was applied); T3 = shade mesh and T4 = without shade mesh. Several variables were evaluated in the plants and in the fruits. The macroscopic characteristics showed mycelium with a cottony morphology and a dark green coloration, and the microscopic characteristics of the fungus were conidiophores with a branch, phialides and ovoid to ellipsoid conidia. Interaction of <em>Trichoderma</em> sp. and shade mesh had a significant effect on plant height, number of flowers and number of fruits, with the greater values with <em>Trichoderma</em> sp. and shade mesh. Regarding the evaluation of the fruits significant differences were found in the weight, diameter, length, and colour (L and a* value) but not in b* value.</p> ER -