Ciencias Agropecuarias

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Start date: 2020Subject: search.filters.subject.ACEITE OZONIZADO

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    Evaluación de aceite ozonizado e hidrolato de ruda para el control de escama de nieve (Unaspis citri) en mandarina (Citrus reticulata), naranja (Citrus sinensis) y lima (Citrus limetta)
    (2025-02) Ojeda Iñiguez Marcelo Raul; Zurita Vásquez José Hernán
    The present research aims to evaluate the effectiveness of ozonized oil and rue hydrolate as insecticides for controlling snow scale (Unaspis citri) in Mandarin (Citrus reticulata), Orange (Citrus sinensis), and Lime (Citrus limetta). The study was conducted in Patate, Tungurahua, at Hacienda San Javier. This research serves as an alternative to the excessive use of agrochemicals, which increasingly produce harmful effects on the environment, human health, and planetary life. A completely randomized block design was used, applying treatments of ozonized oil (P1), rue hydrolate (P3), and their combination (P2) every 8 days for one month, with evaluations 15 and 30 days after the final application. The results showed that P3V1 (rue hydrolate on mandarin) and P2V2 (ozonized oil plus rue hydrolate on orange) achieved the highest mortality rates at 87.42% and 86.13%, significantly reducing pest severity, with optimal doses of 5 cc/L for both products. It was concluded that these alternatives are effective, eco-friendly, and promote sustainable citrus crop management, recommending their continued use to achieve sustainable and profitable agriculture.
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    Evaluación de productos para el manejo de Alternaria spp. en el cultivo de brócoli (Brassica oleracea var. italica)
    (2024-02) Moreta Manobanda, Luis Miguel; Valle Velastegui, Edgar Luciano
    In this study, products were evaluated for the management of (Alternaria spp.) in broccoli (Brassica oleracea var. italica). For this purpose, the effect of two doses of Ozbrand (2 and 4 cm3/l), an ozonated oil with fungicidal properties, was tested and compared with a chemical fungicide (Acord at doses of 0.5 and 1 cm3/l). The variables evaluated were percentage of incidence and severity of the disease, weight and diameter of the head, and crop yield. The incidence in plants treated with ozonated oil (Ozbrand) varied between 23.4 and 26.0%, which meant a reduction of 36.3 and 42.6%, compared to the control treatment, while, in severity, when it was used at the highest dose (4 cm3/l), this product showed results comparable to those obtained with the use of the chemical fungicide. Furthermore, it was observed that the use of Ozbrand at the highest dose (4 cm3/l) allowed obtaining the maximum value of pellet diameter, with values of 20.5 cm, followed by the same product applied at the lowest dose (2 cm3/l), which produced similar results to when the chemical fungicide (Acord) was used at the highest dose (1.0 cm3/l), with which 18.8 and 17.8 cm were obtained, respectively. A similar trend was observed in relation to pellet weight, which was evidenced in the highest yield in plants treated with Ozbrand at a dose of 4 cm3/l (5.3 tn/ha), followed by plants treated with the same product at the lowest dose (4.3 tn/ha). Based on the results, the use of ozonated oil is recommended to control Alternaria leaf spot. Keywords: ozonated oil, broccoli, leaf spot, sustainable management
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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.