A comparison of the efficacy of two commercial acaricides (fipronil and amitraz) withAzadirachta indica(neem) on the brown dog tick (Rhipicephalus sanguineus) from canines in Trinidad

• DOI: 10.1111/tbed.13388
• Publication Date: 2019-11-20T07:24:29Z
• Authors: Rachel‐Ann Suraj; Rhea Rambarran; Krista Ali; Danyelle Harbajan; Roxanne Charles; Candice Sant; Karla Georges; Sharianne Suepaul
• Keywords: Amitraz; Fipronil; Azadirachta; Rhipicephalus sanguineus; Neem Oil

The brown dog tick (Rhipicephalus sanguineus) is prevalent on canids in Trinidad. It directly (by causing anaemia) and indirectly acting as a vector of tick-borne pathogens) responsible for morbidity mortalities the canine population. most commonly used commercial acaricides available to pet owners Trinidad are amitraz fipronil. Often, these may be abused misused desperate attempt rid pets ticks. objective this study was compare efficacy fipronil with herbal alternative, neem (Azadirachta indica). Triplicate vitro trials utilizing Larval Packet Test (LPT) were conducted using three concentrations (low, recommended high) (0.025%, 0.05% 0.1%), (0.01%, 0.02% 1%), oil (10%, 20% 40%) leaf extract (0.25%, 0.5% 2%) each trial. Statistical analysis mixed-effect Poisson regression indicated that there significant difference (p < .05) survival ticks pre-treatment versus post-treatment amitraz, all controls when compared oil. Fipronil caused ≥99% mortality study. Mortalities ranged from 72.7% 82% 38% 95.3%, respectively, greatest percentage occurring at lower concentrations. Neem can alternative acaricides, however, they less efficacious against than