Acaricidal activity of three plants extracts from the central region of Burkina Faso on adult <I>Rhipicephalus (Boophilus) microplus</I> cattle ticks

Abstract

the most important and harmful tick species in the livestock sector in Burkina Faso today. This tick has developed resistance to most classes of synthetic acaricides. The objective of this work is to assess the efficiency of plant extracts on this tick to find an alternative. Thus, the acaricidal activity of hydroethanolic and hexanic extracts of Ocimum americanum .L, Ocimum gratissimum .L and Laggera oloptera (DC) Adams was evaluated on adults of this tick by the adult immersion method. The mortality, the inhibition of the laying, the hatching rate, and the effectiveness of each extract have been evaluated with concentrations at 100 mg/mL and at 200 mg/mL, respectively. The best mortality rate was 56%, with the hydroethanolic extract of L. oloptera at 200 mg / mL. The hydroethanolic extract of O. gratissimum was most effective with the best rates of egg inhibition and hatching rates at 200 mg / mL. The results of this study could be used for the development of new bio-acaricide formulations to fight against the tick R. (Boophilus) microplus effectively.Keywords: Ticks, O. gratissimum, O. americanum, Laggera oloptera, phytochemical screening

Efficacy of neem oil, <i>Zanthoxylum zanthoxyloides</i> and <i>Vernomia colorata</i> extracts on ticks and multi-resistant bacteria isolated from milk in the dairy value chain in Northern Côte d’Ivoire

“…Distilled water was used as a negative control for the tests carried out with the hydroalcoholic extracts and DMSO was used as a negative control for the tests carried out with neem oil and chloroform extracts. The adult immersion test was repeated three times for each concentration of neem oil and extracts tested as well as for controls (Coulibaly et al, 2020).…”