Impacto de Emamectin benzoate en la sobrevivencia y capacidad de predación de Podisus nigrispinus sobre larvas de Spodoptera frugiperda
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Date
2024
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Universidad Nacional de Trujillo
Abstract
El objetivo de este trabajo fue determinar en condiciones de laboratorio el impacto de Emamectin benzoate en la sobrevivencia y capacidad de predación de Podisus nigrispinus sobre larvas de Spodoptera frugiperda. En el experimento se utilizó un diseño completamente al azar (DCA) con un arreglo factorial de 3x5, siendo el primer factor el tipo de alimentación (con 3 niveles: Hojas de maíz asperjado con agua como testigo, hojas de maíz con el producto a dosis de 150gr/200 litros a 0 horas de la infestación y hojas de maíz con el producto aplicado 6 horas antes de la infestación; el segundo factor el número de presas (4, 8, 12, 16 y 20 larvas de estadio III de S. frugiperda) haciendo un total de 15 tratamientos con 5 repeticiones. Los parámetros evaluados fueron: Capacidad de predación y sobrevivencia de la ninfa III de Podisus nigrisinus. Se realizaron evaluaciones 12, 18 y 22 horas después de la infestación. Los resultados muestran que en todos los tratamientos sobrevivió la ninfa III de Podisus nigrispinus y la capacidad de predación fue mayor en el tratamiento de follaje sin el insecticida. Por lo que se concluye que el Emamectin Benzoate no afecta la sobrevivencia ni la capacidad de predación de P. nigrispinus.
ABSTRACT The objective of this work was to determine under laboratory conditions the impact of Emamectin benzoate on the survival and predation capacity of Podisus nigrispinus on Spodoptera frugiperda larvae. The experiment used a completely randomized design (CRD) with a 3x5 factorial arrangement, the first factor being the type of feeding (with 3 levels: corn leaves sprayed with water as a control, corn leaves with the product at a dose of 150 g/200 liters at 0 hours before infestation and corn leaves with the product applied 6 hours before infestation; the second factor was the number of prey (4, 8, 12, 16 and 20 stage III larvae of S. frugiperda) making a total of 15 treatments with 5 replicates. The parameters evaluated were: predation capacity and survival of nymph III of Podisus nigrisinus. Evaluations were carried out 12, 18 and 22 hours after infestation. The results show that Podisus nigrispinus nymph III survived in all treatments and the predation capacity was higher in the foliage treatment without the insecticide. Therefore, it is concluded that Emamectin Benzoate does not affect the survival and predation capacity of P. nigrispinus.
ABSTRACT The objective of this work was to determine under laboratory conditions the impact of Emamectin benzoate on the survival and predation capacity of Podisus nigrispinus on Spodoptera frugiperda larvae. The experiment used a completely randomized design (CRD) with a 3x5 factorial arrangement, the first factor being the type of feeding (with 3 levels: corn leaves sprayed with water as a control, corn leaves with the product at a dose of 150 g/200 liters at 0 hours before infestation and corn leaves with the product applied 6 hours before infestation; the second factor was the number of prey (4, 8, 12, 16 and 20 stage III larvae of S. frugiperda) making a total of 15 treatments with 5 replicates. The parameters evaluated were: predation capacity and survival of nymph III of Podisus nigrisinus. Evaluations were carried out 12, 18 and 22 hours after infestation. The results show that Podisus nigrispinus nymph III survived in all treatments and the predation capacity was higher in the foliage treatment without the insecticide. Therefore, it is concluded that Emamectin Benzoate does not affect the survival and predation capacity of P. nigrispinus.
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Keywords
Sobrevivencia, Capacidad de predación, Infestación presa, Emamectin benzoate