Tesis Agronomía

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    Evaluación de productos alternativos para la prevención de enfermedades foliares en la etapa vegetativa del pimiento (Capsicum annuum L.)
    (2024-02) Freire Chicaiza, Kevin Eduardo; Veloz Naranjo, Walter Oswaldo
    In this research, alternative products were evaluated to prevent foliar diseases in the vegetative stage of pepper. The effect of the application of ozonized oil (Ozoagro) and salicylic acid (Aspirin Lavetec) at doses of 2 ml/L, 2.5 ml/L and 3.0 ml/L was evaluated. The results to be analyzed were stem diameter, plant height, leaf area and incidence of foliar diseases were evaluated in pepper plants variety Iguazú at 45, 60 and 75 days after transplanting (dat). The effect on stem diameter was verified at 45 and 75 dat, being greater in plants treated with salicylic acid at a dose of 3.0 ml/L. Regarding plant height, the effect was observed from 45 dat with the maximum values reached in plants treated with salicylic acid at doses of 2.5 and 3.0 ml/L (18.4 and 18.50 cm), while at 75 dat, higher effect was observed with the highest concentration. Finally, in relation to leaf area, the effect of the application of salicylic acid (3.0 ml/L) was only verified at 75 dat when it reached 107.50 cm2, followed by the rest of the treatments. During the trial, no incidence of diseases was observed in pepper plants treated with salicylic acid and ozonized oil. Keywords: bioestimulation, disease management, alternative products, ozonated oil, salicylic acid.
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    Evaluación de fungicidas para el control de oidio (Oidium sp.) en mora (Rubus glaucus Benth) utilizando el método de termonebulización en Pelileo
    (2022-09) Ati Tamayo, Juan David; Zurita Vásquez, José Hernán
    The blackberry (Rubus glaucus Benth) are currently being affected by a very harmful fungus, known as cenicille, oidio, or powdery mildew (Oidium sp). This fungus, has caused great losses to farmers, especially in the flower production, and therefor in the number of fruits, and the reduction in the photosinthetic area. Whose symptoms are reflected in growth retardation, yellowing plants with coiled shoots, especially in young leaves, in addition to dammage its quality due to a deficiency in fruit setting and filling. This research is based on the control of this pathogen with two fungicides el Topas (Penconazole 25%EC) and Novak (Metil tiofanato 50%SC) with doses of 0,5 y 1 cc/ l, using the thermo-fogging method on the control of Oidium sp. in blackberry (R. glaucus Benth) crops. Operates on a randomized complete block split plot design with a 22 + 1 factorial arrangement with three replications, adding a total of 15 experimental units. The variables evaluated are: incidence and severity of oidium sp on the leaves of production branches. Statistically, it is determined that the product with the best control is Topas (Penconazole 25% EC) at dose of 1cc/l, in this research they present lower values in incidence and severity. The thermal fogging application method is highly effective for the control of Oidium sp, it increase considerably the effectiveness and efficiency the active ingredient of the fungicide, by evenly spreading the product in micro drops that achieve greater coverage