Acaricide resistance in Rhipicephalus appendiculatus ticks collected from different farming systems in Zimbabwe

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...

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Bibliographic Details
Published in:Tropical animal health and production 2021-09, Vol.53 (4), p.431-431, Article 431
Main Authors: Chitombo, Laurene, Lebani, Kebaneilwe, Sungirai, Marvelous
Format: Article
Language:English
Subjects:
Acaricides
Biomedical and Life Sciences
Cattle
Chlorfenvinphos
Commercial farms
Farming
Farming systems
Farms
Life Sciences
Livestock farming
Organophosphates
Regular Articles
Resistance factors
Rhipicephalus appendiculatus
Small farms
Small-scale farming
Ticks
Veterinary Medicine/Veterinary Science
Zoology
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Summary: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.
ISSN:0049-4747
1573-7438
DOI:10.1007/s11250-021-02881-2