Eficácia in vitro do óleo de Carapa guianensis Aubl. (Meliaceae) sobre Damalinia (Bovicola) ovis Schrank (1781)

Antônia Aniellen Raianne Moises Aguiar,Iany Leda Moreira Dantas,Josivania Soares Pereira,Wesley Adson Costa Coelho,Weibson Pinheiro Paz André,Caio Michel De Morais Rolim

doi:10.21708/avb.2021.15.4.10142

Antônia Aniellen Raianne Moises Aguiar, Iany Leda Moreira Dantas + Show 4 more

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https://doi.org/10.21708/avb.2021.15.4.10142

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Abstract

Productivity in small ruminants can be compromised due to lice infestations. This pest infestation is controlled by the administration of insecticides, and their excessive use causes resistance. New control alternatives are being investiga-ted, especially the use of phytotherapeutics. Research using the oil from Carapa guianensis (andiroba) has shown insecticidal action on feline and goat lice specimens. The present study aimed to evaluate the efficacy of C. guianensis seed oil, in vitro, on Damalinia (Bovicola) ovis.Nine hundred specimens of D. (Bovicola) ovis were randomly assigned into groups and were subjected to different treatments: (G1) 1,000 to 15.6 mg/mL of C. guianensis oil; (G2) 3% Tween 80 (negative control); and (G3) amitraz 1.25 g/mL (positive control). Data presentation was expressed as mean efficacy ± standard deviation using the statistical program SPSS version 23.0 and statistical differences of the experimental groups were obtained by Kruskal-Wallis and Friedman. Probit Regression was performed to obtain CI50 and CI90, with a significance level of p < 0.05. The oil with a concentration of 1,000 mg/mL had an efficacy of 94% after 24 hours of exposure, differing statistically from the positive and negative control (p < 0.05). The IC50 and IC90 values were 439.21 mg/mL and 807.09 mg/mL, respectively. The action of the oil on the specimens was independent whether it was an adult female, male, or nymph. It is concluded that C. guianensis oil showed in vitro insecticidal effect against D. (Bovicola) ovis.

Highlights

In Brazil, sheep and goat farming is considered an important activity from a social and economic point of view
D. (Bovicola) ovis infestations have been controlled by administering chemicals with insecticidal effect (LEVOT, 2012)
Few ectoparasiticides that have insecticidal effect on lice are available for commercialization, due to the development of resistance

Summary

Introduction

In Brazil, sheep and goat farming is considered an important activity from a social and economic point of view. Sheep production in Brazil has grown significantly, standing out among the agribusiness sectors and is currently considered one of the most important activities for the Brazilian northeastern semi-arid region, both in the cultural and economic contexts. (Bovicola) ovis infestations have been controlled by administering chemicals with insecticidal effect (LEVOT, 2012). By their indiscriminate use and without guidance on dosages, the effectiveness of these drugs has been compromised by the development of parasite populations resistant to them (TAYLOR, 2012). Few ectoparasiticides that have insecticidal effect on lice are available for commercialization, due to the development of resistance In this context, the search for alternative ways to control D. The search for alternative ways to control D. (Bovicola) ovis is necessary to minimize this problem, highlighting the study of the effectiveness of herbal medicines as an important method in lice control (JAMES; CALLANDER, 2012)

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