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Toxicity and Metabolism of Zeta-Cypermethrin in Field-Collected and Laboratory Strains of the Neotropical Predator Chrysoperla externaHagen (Neuroptera: Chrysopidae)
- Source :
- Neotropical Entomology; June 2017, Vol. 46 Issue: 3 p310-315, 6p
- Publication Year :
- 2017
-
Abstract
- Resistance to pesticides has been studied in several insect pests, but information on the natural enemies of pests—including the Neotropical predator Chrysoperla externaHagen (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. externasubjected 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. externahas 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.
Details
- Language :
- English
- ISSN :
- 1519566X and 16788052
- Volume :
- 46
- Issue :
- 3
- Database :
- Supplemental Index
- Journal :
- Neotropical Entomology
- Publication Type :
- Periodical
- Accession number :
- ejs41493092
- Full Text :
- https://doi.org/10.1007/s13744-017-0497-z