Neotropical Entomology (2017) 46, 310-315

M. Haramboure, G. Smagghe, J. Niu, O. Christiaens, P. Spanoghe and R.A. Alzogaray (2017)
Toxicity and metabolism of zeta-cypermethrin in field-collected and laboratory strains of the Neotropical predator Chrysoperla externa Hagen (Neuroptera: Chrysopidae)
Neotropical Entomology 46 (3), 310-315
Abstract: Resistance to pesticides has been studied in several insect pests, but information on the natural enemies of pests—including the Neotropical predator Chrysoperla externa Hagen (Neuroptera: Chrysopidae), a major biological control agent in South America—is lacking. We report here a comparative study between a field-collected strain of C. externa subjected to monthly sprayings of pyrethroids and neonicotinoids and a laboratory strain without exposure to pesticides. The tolerance of both strains against zeta-cypermethrin was similar, and addition of the synergist piperonyl butoxide increased the toxicity by 30% in both strains. Gas-chromatography analyses and mixed-function-oxidase measurements indicated similar values in both strains and also confirmed the key role of oxidative metabolism in this species. Because C. externa has maintained a tolerance to zeta-cypermethrin without previous pesticide exposure, this species could potentially be mass-reared and released in fields in the presence of pesticide pressure.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Marina Haramboure, Guy Smagghe

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
resistance to pesticides

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
Chrysoperla externa (predator)