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Original Research Article

Toxicity evaluation of spinosad on male wistar rats

Adebiyi, Opeymi. E., Fadina, Olubunmi.O., Fayinminnu, Olajumoke.O., Idowu-Agida, Oladayo.O., Oladigbolu, Abiola.A., Oladosu, Bolanle. O and Dixon, Henry.A.


1National Horticultural Research Institute,Jericho Ibadan
2Department of Crop Protection and Environmental Biology, University of Ibadan

*Corresponding Author Email: adebiyiope(at)gmail.com


Article Number:  |   Pages:  |     |   DOI:

 Received: May 23, 2019  Accepted: July 5, 2019  Published: October 22, 2019

Abstract

This study was carried out at the animal experimental house, department of Animal Science, University of Ibadan. Twenty rats weighing between 150-165g were used for the experiment for a period of five weeks, laid out in a Completely Randomized Design (CRD) with five groups of 4 rats per treatment including control. The rats were fed with Spinosad preserved maize incorporated feed. The doses of 0.5mg/kg, 1mg/kg (recommended), 1.5 and 2mg/kg were administered once daily for 3 weeks. Toxicological effects were studied and were analysed using descriptive statistics at p≥0.05. The results showed decrease in body weights in rats in accordance to increase in doses. Gross pathological cyst and irregularities were observed in all the livers while the kidneys showed no significant changes to spinosad. Some haematological parameters such as packed cell volume (PCV), Haemoglobin count (Hgb), Red blood cell (RBC), White blood cell (WBC), revealed no significant differences except the monocytes. The serum biochemical tests such as Aspartate aminotransferase (AST), Alanine aminotransferase (ALT), Albumin (Alb) and Globulin (Gb) revealed significant differences in values especially among rats treated. Comparism between the recommended (1.00mg/kg) and various levels of overdose (1.5 and 2.00mg/kg) has significant differences. Spinosad as a formulated form “Tracers®” under the present experimental conditions seems to be toxic to liver at a particular dosage by varied changes in cyst observed and in the levels of the heamatology, biochemical parameters and histopathology changes as a result of different concentrations in the treated groups relative to the control group. The overdoses of spinosad were found out to negatively affect liver and impaired its function; hence negatively impact the health of the animals. Abuse, misuse or overdoses of spinosad (bio-insecticide) should be discouraged.

Keywords:

Bio-insecticide, histological, organs, spinosad, serum biochemistry, wistar rats

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