Comparative acute toxicity of two phytosanitary molecules, lambda-cyhalothrin and acetamiprid, on Nile Tilapia (Oreochromis Niloticus) juveniles

Nicresse L. Guedegba, Ibrahim Imorou Toko, Prudencio T. Agbohessi, Berny’s Zoumenou, Caroline Douny, Robert Mandiki, Bruno Schiffers, Marie Louise Scippo, Patrick Kestemont

Research output: Contribution to journalArticle

Abstract

This study aimed to compare the toxicity for fish of two active ingredients (lambda-cyhalothrin-20 g L −1, a pyrethroid, and acetamiprid-15 g L −1, a neonicotinoid) which are components of a commercial insecticide (Acer 35 EC) used in cotton crop in many West African countries. The juveniles of Oreochromis niloticus (4.01 ± 0.34 g, mean body weight) were exposed for 96 h to increasing concentrations of active ingredients (lambda-cyhalothrin and acetamiprid) or a mixture similar to Acer 35 EC (composed by 20 g of chemical compound lambda-cyhalothrin and 15 g of acetamiprid dissolved in 1 L of acetone). The experiments were carried out under controlled conditions in aquaria according to OECD Guidelines. During the experiments, the behavioral responses (loss of balance, color change, hyperactivity, etc.) that usually precede death were observed in exposed fish. Mortalities were recorded in each aquarium and the LC 50-96h of each chemical was determined. The LC 50-96h obtained were respectively 0.1268, 0.0029, 182.9 and 0.5685 ppm for Acer 35 EC, lambda-cyhalothrin, acetamiprid and mixture. All insecticides used in this study had profound impact on Nile tilapia behavior which may confirm the neurotoxicity of each single active compound as well as of their mixture.

Original languageEnglish
Pages (from-to)580-589
Number of pages10
JournalJournal of Environmental Science and Health - Part B Pesticides, Food Contaminants, and Agricultural Wastes
Volume54
Issue number7
DOIs
Publication statusPublished - 3 Jul 2019

Keywords

  • acute toxicity
  • behavioral responses
  • LC50-96h
  • neonicotinoids
  • Nile tilapia
  • Pyrethroids

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