Abstract

PAJARO-CASTRO, Nerlis; CABALLERO-GALLARDO, Karina  and  OLIVERO-VERBEL, Jesus. Morphological abnormalities in Tribolium castaneum Herbst (Coleoptera: Tenebrionidae) treated with eight toxic compounds. Rev. ion [online]. 2024, vol.37, n.1, pp.15-24.  Epub May 06, 2024. ISSN 0120-100X.  https://doi.org/10.18273/revion.v37n1-2024001.

Toxicity testing is essential for preventing chemical pollution of the environment. Tribolium castaneum can be used as an alternative model for preliminary toxicity screening, eight chemical compounds having known toxicity were evaluated. For example, mercury (II) chloride is considered toxic at concentrations higher than 0.1 mg/L in drinking water, phenol exposure to concentrations greater than 5 mg/L in drinking water can be dangerous, in the case of toluene exposure to concentrations greater than 200 ppm (parts per million) in the air can be harmful to health, hydrazine can be dangerous at concentrations higher than 1 mg/L in drinking water, and caffeine can cause adverse effects such as nervousness, insomnia, tachycardia, and tremors from exposure to doses higher than 500 - 600 mg in adults. In this case, adult insects were fed a diet of oatmeal supplemented with each separately toxic. The number of offspring insects, size, weight, and observation of abnormalities was evaluated. The eight chemicals assessed compounds only Ave had a visible effect on insect development, BPA and mercury (II) chloride induced abnormalities in the larval and pupal stages, while the phenol, toluene, and metronidazole, in the pupal stage only. Major anomalies were observed necrosis in larvae appendices, in pupae, papillae for sex differentiation are sclerotic or absent, and abnormality in the formation of head, limbs, wings, and appendages. Mercury (II) chloride was the most toxic due to the affected growth, development and reproduction of the insect.

Keywords : Invertebrate; Toxic effects; Ecotoxicology; Reproduction.

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