Uptake of dietary selenium by laboratory and field feeding Podisus maculiventris (Heteroptera: Pentatomidae)

Authors

  • Kent S. Shelby Biological Control of Insects Research Laboratory, USDA, Agricultural Research Service, 1503 S. Providence Road, Columbia, MO 65203, USA
  • Thomas A. Coudron Biological Control of Insects Research Laboratory, USDA, Agricultural Research Service, 1503 S. Providence Road, Columbia, MO 65203, USA
  • Juan A. Morales-Ramos National Biological Control Laboratory, USDA, Agricultural Research Service, 59 Lee Road, Stoneville, MS 38776, USA

Keywords:

selenium, spined soldier bug, alfalfa weevil, alfalfa

Abstract

Summary

Podisus maculiventris (Say) (Hemiptera: Pentatomidae) is a generalist predator commercially available for augmentative biological control of pest insects in a variety of crop and orchard systems. It is exposed to a wide variety of micronutrients based on the soil type, plant, and insect prey items consumed. Bioaccumulation of selenium by adult females of P. maculiventris fed insectary-reared Trichoplusia ni Hübner (Lepidoptera: Noctuidae) larval prey was not statistically significant. However, adult females of P. maculiventris collected from the field that had been feeding primarily on alfalfa weevils (Hypera postica Gyllenhal; Coleoptera: Curculionidae), and those fed an artificial diet, showed significant bioaccumulation of selenium. This is the first report of biomagnification of a trace element across 3 trophic levels involving P. maculiventris.

 

Sumario

Podisus maculiventris (Say) (Hemiptera: Pentatomidae) es un predador generalista, el cual es comercialmente disponible para uso en control biológico aumentativo contra insectos plaga en una variedad de cultivos y sistemas de huertas. Podisus maculiventris es expuesto a una gran variedad de micronutrientes en su medio natural según el tipo de suelo, plantas e insectos presa consumidos. La bioacumulación de selenio por P. maculiventris alimentado a base de larvas de Trichoplusia ni Hübner (Lepidoptera: Noctuidae) criado en insectario no fue estadísticamente significativa. Sin embargo, P. maculiventris colectados en campo, consumiendo primariamente picudos de la alfalfa (Hypera postica Gyllenhal; Coleoptera: Curculionidae), así como los alimentados con dieta artificial mostraron bioacumulación significativa de selenio. Este es el primer reporte de bioacumulación de elementos traza a través de tres niveles tróficos incluyendo P. maculiventris. 

 

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Author Biography

Kent S. Shelby, Biological Control of Insects Research Laboratory, USDA, Agricultural Research Service, 1503 S. Providence Road, Columbia, MO 65203, USA

Research Entomologist

USDA-ARS-BCIRL

 

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Published

2017-04-16

Issue

Vol. 100, No. 1 (March 2017)

Section

Scientific Notes

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