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Sublethal exposure to pyriproxyfen does not impair the abilities of the backswimmer Buenoa amnigenus to prey upon Aedes aegypti larvae.

Publication ,  Journal Article
Valbon, W; Araújo, SHC; Nery, RS; Barbosa, JF; Newland, PL; Oliveira, EE
Published in: Ecotoxicology (London, England)
August 2022

Pyriproxyfen is a juvenile hormone analogue that is commonly used to control the immature stages of mosquitoes in both artificial and natural water reservoirs. Recently, concerns have been raised regarding the community effectiveness of pyriproxyfen in preventing vector-transmitted diseases. Such concerns have been based on the unintended effects on non-target organisms and the selection of resistant mosquito populations. This investigation was, therefore, conducted to evaluate the toxicity of pyriproxyfen to Aedes aegypti (Diptera: Culicidae) larvae and the backswimmer Buenoa amnigenus (Hemiptera: Notonectidae), a naturally occurring mosquito larvae predator. We also assessed the abilities of backswimmers exposed to sublethal levels of pyriproxyfen to prey upon mosquito larvae (L2) under three larval densities (3, 6, or 9 larvae/100 mL of water) using artificial containers. Our results revealed that pyriproxyfen killed backswimmers only at concentrations higher than 100 μg active ingredient [a.i.]/L, which is 10 times higher than that recommended for larvicidal field application (i.e, 10 μg a.i./L). The abilities of backswimmers exposed to sublethal levels of pyriproxyfen (100 μg a.i./L) to prey upon mosquito larvae were not affected. Harmful effects on the backswimmer predatory abilities were detected only at concentrations of 150 μg a.i./L and when there was a higher prey availability (i.e., 9 larvae/100 mL of water). Together, our findings indicate that the reduced community effectiveness of this insecticide derives from factors other than its detrimental effects on non-target organisms such as backswimmers.

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Published In

Ecotoxicology (London, England)

DOI

EISSN

1573-3017

ISSN

0963-9292

Publication Date

August 2022

Volume

31

Issue

6

Start / End Page

998 / 1008

Related Subject Headings

  • Water
  • Toxicology
  • Pyridines
  • Mosquito Vectors
  • Mosquito Control
  • Larva
  • Insecticides
  • Heteroptera
  • Animals
  • Aedes
 

Citation

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Valbon, W., Araújo, S. H. C., Nery, R. S., Barbosa, J. F., Newland, P. L., & Oliveira, E. E. (2022). Sublethal exposure to pyriproxyfen does not impair the abilities of the backswimmer Buenoa amnigenus to prey upon Aedes aegypti larvae. Ecotoxicology (London, England), 31(6), 998–1008. https://doi.org/10.1007/s10646-022-02562-2
Valbon, Wilson, Sabrina Helena C. Araújo, Ritanne S. Nery, Julianna F. Barbosa, Philip L. Newland, and Eugênio E. Oliveira. “Sublethal exposure to pyriproxyfen does not impair the abilities of the backswimmer Buenoa amnigenus to prey upon Aedes aegypti larvae.Ecotoxicology (London, England) 31, no. 6 (August 2022): 998–1008. https://doi.org/10.1007/s10646-022-02562-2.
Valbon W, Araújo SHC, Nery RS, Barbosa JF, Newland PL, Oliveira EE. Sublethal exposure to pyriproxyfen does not impair the abilities of the backswimmer Buenoa amnigenus to prey upon Aedes aegypti larvae. Ecotoxicology (London, England). 2022 Aug;31(6):998–1008.
Valbon, Wilson, et al. “Sublethal exposure to pyriproxyfen does not impair the abilities of the backswimmer Buenoa amnigenus to prey upon Aedes aegypti larvae.Ecotoxicology (London, England), vol. 31, no. 6, Aug. 2022, pp. 998–1008. Epmc, doi:10.1007/s10646-022-02562-2.
Valbon W, Araújo SHC, Nery RS, Barbosa JF, Newland PL, Oliveira EE. Sublethal exposure to pyriproxyfen does not impair the abilities of the backswimmer Buenoa amnigenus to prey upon Aedes aegypti larvae. Ecotoxicology (London, England). 2022 Aug;31(6):998–1008.
Journal cover image

Published In

Ecotoxicology (London, England)

DOI

EISSN

1573-3017

ISSN

0963-9292

Publication Date

August 2022

Volume

31

Issue

6

Start / End Page

998 / 1008

Related Subject Headings

  • Water
  • Toxicology
  • Pyridines
  • Mosquito Vectors
  • Mosquito Control
  • Larva
  • Insecticides
  • Heteroptera
  • Animals
  • Aedes