The US cattle industry is constantly threatened with the introduction and spread of potentially fatal pathogens that can cause diseases, such as bovine babesiosis. ( B.) microplus and show that Nootkatone, Stop the Bites, and BioUD may significantly decrease tick populations (Drummond’s index > 90% at concentrations of 5%), highlighting their potential as alternatives to synthetic acaricides for the control of cattle fever ticks. Using the FAO 2004 guidelines, we evaluated the effectiveness of these organic compounds at reducing the fecundity of R. Similarly, NootkaShield, Stop the Bites, and BioUD had strong repellent properties with over 90% repellency at the two highest concentrations tested. By comparison, lavender and cedar oil led to around 90% mortality at 10 and 1% concentrations, respectively. The results from the LITs indicate that three of the organic compounds (NootkaShield™, Stop the Bites, BioUD) led to significant mortalities at low concentrations (0.2, 0.02, and 0.08%, respectively).
The efficacy of five organic compounds (nootkatone, Stop the Bites®, BioUD®, lavender oil, and cedarwood oil) was evaluated using larval immersion tests (LITs), repellency assays, and adult immersion tests (AITs). Among potential avenues for the discovery of novel acaricides are plant-derived compounds. Management of this tick species has been focused on the use of synthetical acaricides however, the emergence of acaricide resistance to single or multiple active ingredients has resulted in a need for novel acaricide compounds. Infestations with this tick can lead to direct damage and cattle mortality due to the transmission of potentially deadly pathogens. The cattle fever tick, Rhipicephalus ( Boophilus) microplus, is the most economically important tick worldwide.
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