Aptitud biológica de Gonizus Legneri a diferentes temperaturas
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Date
2023
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Publisher
Universidad de Concepción
Abstract
Goniozus legneri es un insecto parasitoide con potencial para el control de plagas del orden Lepidóptera. Se realizaron dos bioensayos en condiciones de laboratorio con el objetivo de evaluar el efecto de la temperatura en G. legneri. El primer bioensayo evaluó el porcentaje de larvas paralizadas, ovipostura, pupación, emergencia y mortalidad del parasitoide, cuyos resultados indicaron que las temperaturas ideales son 26 y 30 °C debido a que, registraron un 72 y 58% de larvas paralizadas respectivamente. Adicionalmente se obtuvo 50 y 40% de emergencia de G. legneri adultos. Además, los resultados en los tratamientos de 11 y 18 °C con 0 y 36% de ovipostura y 0 y 20% de emergencia de adultos, permiten inferir que G. legneri se puede utilizar en climas con temperaturas menores, ya que a 11°C y 18°C se obtuvieron 42 y 52% de larvas paralizadas. El segundo bioensayo evaluó la preferencia de G. legneri por cinco estadios larvales de G. mellonella en diferentes temperaturas, obteniéndose que G. legneri presenta preferencia por el sexto y séptimo estadio larval de G. mellonella a 11, 26 y 30°C. Se concluye que la temperatura influencia la actividad biológica y preferencia de G. legneri por un estadio larval de G. mellonella.
Goniozus legneri is a parasitoid insect with potential for controlling pests of Lepidoptera order. Two bioassays were carried out under laboratory conditions with the objective of assessing the effect of temperature on G. legneri. The first bioassay evaluated the percentage of paralyzed larvae, oviposition, pupation, emergence and mortality of the parasitoid. Results indicated that the ideal temperatures are 26 and 30 °C because 72 and 58% respectively of paralyzed larvae were recorded. Additionally, at the end of the bioassay, 50 and 40% of G. legneri adult emergence was obtained. Furthermore, results in treatments of 11 and 18 °C with 0 and 36% oviposition and 0 and 20% of adult emergence, allow us to infer that G. legneri can be used in climates with lower temperatures, since at 11 °C and 18°C, 42 and 52% of paralyzed larvae were obtained. The second bioassay assessed the preference of G. legneri for five larval stages of G. mellonella at different temperatures, obtaining that G. legneri exhibits preference for the sixth and seventh G. mellonella larval stages at 11, 26 and 30°C. We conclude that temperature influences the G. legneri´s biological activity and G. mellonella larval stages preference.
Goniozus legneri is a parasitoid insect with potential for controlling pests of Lepidoptera order. Two bioassays were carried out under laboratory conditions with the objective of assessing the effect of temperature on G. legneri. The first bioassay evaluated the percentage of paralyzed larvae, oviposition, pupation, emergence and mortality of the parasitoid. Results indicated that the ideal temperatures are 26 and 30 °C because 72 and 58% respectively of paralyzed larvae were recorded. Additionally, at the end of the bioassay, 50 and 40% of G. legneri adult emergence was obtained. Furthermore, results in treatments of 11 and 18 °C with 0 and 36% oviposition and 0 and 20% of adult emergence, allow us to infer that G. legneri can be used in climates with lower temperatures, since at 11 °C and 18°C, 42 and 52% of paralyzed larvae were obtained. The second bioassay assessed the preference of G. legneri for five larval stages of G. mellonella at different temperatures, obtaining that G. legneri exhibits preference for the sixth and seventh G. mellonella larval stages at 11, 26 and 30°C. We conclude that temperature influences the G. legneri´s biological activity and G. mellonella larval stages preference.
Description
Tesis para optar al título de Ingeniero Agrónomo
Keywords
Parasitología, Larvas, Lepidópteros