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Year 2017 - Volume 37, Number 4
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Toxicity of Thiamethoxam insecticide for Pacamã (Lophisiolurus alexandri), 37(4):307-312
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ABSTRACT.- Albinati A.C.L., Soares P.C., Albinati R.C.B., Moreira E.L.T., Lira A.D. & Carvalho J.V. 2017. [Toxicity of Thiamethoxam insecticide for Pacamã (Lophisiolurus alexandri).] Toxicidade do inseticida Tiametoxam para o Pacamã (Lophisiolurus alexandri). Pesquisa Veterinária Brasileira 37(4):307-312. Colegiado de Medicina Veterinária, Universidade do Vale do São Francisco, Rodovia BR-407 Km 12, Lote 543, Projeto de Irrigação Senador Nilo Coelho s/n, C1, Petrolina, PE 56300-990, Brazil. E-mail: catarina.albinati@gmail.com
This research evaluated acute and chronic toxicity of a thiamethoxam insecticide for Pacamã (Lophisiolurus alexandri), assessing the LC50 and liver histopathological changes in animals exposed for 96 hours and 15 days. Therefore, were used 120 fingerlings subjected to five different concentrations (30, 60, 120, 240 and 480mg/L) for 15 days with two sampling times, 96 hours and 15 days. There was no significant mortality during the experimental period, however the animals showed changes as vacuolation, congestion and necrosis. The LC50 was determined as greater than 100mg/L, considered practically non-toxic. Necrosis was the more significant change in exposed animals, with increasing occurrence in chronic toxicity test. |
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