ArticleTropical animal health and production2021
Acaricide resistance in Rhipicephalus appendiculatus ticks collected from different farming systems in Zimbabwe.
Article in Tropical animal health and production, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed, 10 citations in OpenAlex.
- Efficacy of amitraz acaricide footbaths against cattle and goat tick infestations on sites in Highveld and Lowveld regions of Zimbabwe.Parasite epidemiology and control · 2026Article
- Diagnostic performance of a Rapid Tick exposure Test (RaTexTParasites & vectors · 2025Article
- Hard Ticks as Vectors: The Emerging Threat of Tick-Borne Diseases in India.Pathogens (Basel, Switzerland) · 2024Review
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Authors and funding
3 authors at 2 institutions in 2 countries.
Funding
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Abstract
The larval packet test (LPT) was used to investigate resistance in Rhipicephalus appendiculatus ticks to the amidine (amitraz) and organophosphate (chlorfenvinphos) chemical acaricides in different farming systems in Mashonaland West Province in Zimbabwe. The study results showed emerging resistance (ER) to amitraz in small-scale and commercial farming systems. The tick populations in communal farming systems were susceptible to both acaricides. A similar trend was observed for chlorfenvinphos, where ER was observed in the small-scale farming systems compared to communal and commercial farms. Furthermore, resistance ratios (RR) were higher for amitraz as compared to chlorfenvinphos. This study suggests that management practices, acaricide formulations, applications on cattle, intensity, and frequency of use could be pre-disposing factors for the emerging resistance towards amitraz observed in R. appendiculatus ticks found in small-scale and commercial farming systems. Amitraz is the most common and frequently used acaricides in all farming systems, and hence, resistance is developing much faster than organophosphates. There is a need to investigate further acaricide use and management practices in Zimbabwe's cattle farming systems to develop practical strategies for prevention and management of tick acaricide resistance.
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