Translator Disclaimer
1 March 2011 Efficacy of Spinosad Against Acaricide-Resistant and -Susceptible Rhipicephalus (Boophilus) microplus and Acaricide-Susceptible Amblyomma americanum and Dermacentor variabilis
Author Affiliations +
Abstract

Various acaricide-resistant strains of Rhipicephalus (Boophilus) microplus, representative of the major resistance mechanisms found in Mexico and Brazil, were exposed to spinosad using the Food and Agriculture Organization of the United Nations larval packet test and adult immersion test (AIT). Larvae of all strains tested were found to be susceptible to spinosad. Conversely, spinosad did not show toxic activity toward engorged females used in the AIT. In vitro tests against larvae, nymphs, and adults of acaricide-susceptible Amblyomma americanum and Dermacentor variabilis revealed differences in activity that were dependent on tick species and parasitic life stage. Spinosad seemed to be a viable alternative to current acaricides available for tick control in the species tested. The larval packet test should be used for future monitoring of resistance, as the AIT did not provide useful information with this chemical. The potential benefit for the use of spinosad in integrated pest management or eradication programs is discussed.

Robert J. Miller, W. Hunter White, Ronald B. Davey, John E. George, and Adalberto Perez De Leon "Efficacy of Spinosad Against Acaricide-Resistant and -Susceptible Rhipicephalus (Boophilus) microplus and Acaricide-Susceptible Amblyomma americanum and Dermacentor variabilis," Journal of Medical Entomology 48(2), 358-365, (1 March 2011). https://doi.org/10.1603/ME08222
Received: 26 September 2008; Accepted: 1 November 2010; Published: 1 March 2011
JOURNAL ARTICLE
8 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top