Impact of Organic Insecticides on the Survivorship and Mobility of Halyomorpha halys (Stål) (Hemiptera: Pentatomidae) in the Laboratory
Keywords:
brown marmorated stink bug, invasive species, lethality, mobility, pesticideAbstract
The invasive brown marmorated stink bug, Halyomorpha halys (Stål) (Hemiptera: Pentatomidae) has become a major concern for specialty and row crop growers in the United States. Management tactics against this new pest are currently limited to repeated synthetic insecticide applications, thereby making this problem even more challenging for the organic grower community. This study evaluated the insecticidal efficacy of organically-approved insecticides (azadirachtin, potassium salts of fatty acids, spinosad, pyrethrins, and pyrethrins + kaolin) and experimental biopesticides (Chromobacterium subtsugae Martin et al. strain PRAA4-1T [MBI-203], extract of Eucalyptus sp. [MBI-205], and Burkholderia sp. [MBI-206]). These materials were presented as 18-h old dried residues against adult H. halys in the laboratory. Nonlethal effect on horizontal walking mobility of H. halys was evaluated during a 4.5-h insecticide exposure period; vertical walking mobility was measured at 4.5 h and 7 d after the insecticide exposure. All treatments, except for azadirachtin, resulted in significantly higher mortality of H. halys over 7 d, compared with the untreated control. Pyrethrins + kaolin, MBI-203, and MBI-206 resulted in ≥80% of individuals moribund or dead after 7 d. Horizontal walking distance of H. halys was significantly greater immediately and 3 h after exposure to pyrethrins and MBI-203, respectively, compared with the untreated control. After the 4.5-h exposure to potassium salts, pyrethrins, and pyrethrins + kaolin, surviving H. halys climbed significantly shorter distances while those exposed to MBI-203 climbed significantly greater distances compared with the untreated control, in the vertical mobility bioassay. After 7 d, there was no measurable difference, in the vertical walking distance by surviving individuals, between any of the tested materials and the untreated control. The results of the study are discussed within the context of developing effective management strategies for H. halys in organic production systems.
El chinche hediondo café marmolado invasivo, Halyomorpha halys (Stål) (Hemiptera: Pentatomidae) se ha convertido en una preocupación importante para los agricultores de los Estados Unidos. Actualmente, las tácticas de manejo en contra de esta nueva plaga se limitan a las aplicaciones repetidas de insecticidas sintéticos, lo que hace el problema aún más difícil para la comunidad de agricultores orgánicos. Este estudio evaluó la eficacia de productos seleccionados de insecticidas orgánicos aprobados (azadiractina, sales de potasio de ácidos grasos, spinosad, piretrinas y piretrinas + caolín) y biopesticidas experimentales (Chromobacterium subtsugae [MBI-203], extracto de Eucalyptus sp. [MBI- 205], y Burkholderia sp. [MBI-206]) presentados como residuos secos por 18 horas contra los adultos de H. halys en el laboratorio. Se evaluó el efecto no letal en la movilidad horizontal de caminar de H. halys durante un período de exposición a insecticidas de 4.5 horas; se midió la movilidad vertical de caminar a las 4.5 horas y 7 días después de la exposición al insecticida. Todos los tratamientos, menos la azadiractina, resultaron en una mortalidad significativamente mayor de H. halys durante los 7 dias, en comparación con el control sin tratar. Las piretrinas + caolín, MBI-203 y MBI-206 resultaron en ≥80% de los individuos moribundos o muertos después de 7 días. La distancia horizontal de caminar de H. halys fue significativamente mayor inmediatamente después de la exposición a las piretrinas y 3 horas después de MBI-203, en comparación con el control no tratado. En el bioensayo de la movilidad vertical, los H. halys que sobrevivieron después de la exposición por 4.5 horas a las sales de potasio, piretrinas, y piretrinas + caolín subieron distancias significativamente más cortas, mientras que los expuestos a MBI-203 subieron significativamente mayores distancias en comparación con el control no tratado. Después de 7 días, no hubo una diferencia medible en la distancia vertical de caminar entre los materiales probados y el control sin tratar. En este estudio se discuten los resultados en el contexto de un desarrollar de programas de manejo eficaces para esta especie invasora en la producción orgánica.
Downloads
Published
Issue
Section
License
Copyright for any article published in Florida Entomologist is held by the author(s) of the article. Florida Entomologist is an open access journal. Florida Entomologist follows terms of the Creative Commons, Attribution Non-Commercial License (cc by-nc). By submitting and publishing articles in Florida Entomologist, authors grant the FOJ and Florida Entomologist's host institutions permission to make the article available through Internet posting and electronic dissemination, and to otherwise archive the information contained both electronically and in a hard printed version. When used, information and images obtained from articles must be referenced and cited appropriately. Articles may be reproduced for personal, educational, or archival purposes, or any non-commercial use. Permission should be sought from the author(s) for multiple, non-commercial reproduction. Written permission from the author(s) is required for any commercial reproduction.