Browsing by Author "Ayala Ortega, Mabel Andrea"
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Item Evaluación de la actividad larvicida de Trichoderma harzianum y Bacillus thuringiensis sobre el gusano barrenador de la caña de azúcar Diatraea saccharalis.(Universidad Santiago de Cali, 2023) Ayala Ortega, Mabel Andrea; Perea, Esteban Murcia; Martínez Garay, Carlos AndrésThe pests present in crops are one of the biggest problems, which results in economic losses and possible diseases to the consumer. The larva of Diatraea saccharalis is identified as the main problem for sugarcane producers in Valle del Cauca, causing weight loss and sugars in the stem when the cane is ripe. The damage caused to the plant facilitates fungal and/or bacterial infections. For this reason, it is proposed to evaluate the bioinsecticidal activity of the bacterium Bacillus thuringiensis and the fungus Trichoderma harzianum on the larvae of the sugarcane borer Diatraea saccharalis. Three treatments (1x108 esp/mL, 1.25x106 esp/mL, 2x105 esp/mL) were evaluated for T. harzianum and two for B. thuringiensis (1x109 CFU/mL and 1x106 CFU/mL) in triplicate using 60 larvae for each treatment. Therefore, treatment 1 (1x108 esp/mL) of the fungus T. harzianum presented a mortality of 52.83% in 204 hours (8.5 days) and treatment 2 (1.25x106 esp/mL) a mortality of 37.74%, without showing a significant difference between the two treatments. Treatment 1 (1x109 CFU/mL) of B. thuringiensis presented a mortality rate of 96.23% at the same time. The results showed that Trichoderma harzianum does have an effect on the mortality of D. saccharalis larvae. when applied at a concentration of 1x108 esp/mL, but it is not as efficient compared to B. thuringiensis