TITLE:
Evaluation of Endectocides and Conventional Acaricides in the Control of the Boophilus microplus on Field-Kept Dairy Cattle in the State of Pernambuco-Brazil
AUTHORS:
Vania Lucia Assis Santana, Maria Aparecida Da Gloria Faustino, Erika Korinfsky Vanderley, Marilene Maria Lima, Leucio Camara Alves
KEYWORDS:
Boophilus microplus; Tick; Carrapaticide; Efficiency; Resistance
JOURNAL NAME:
Open Journal of Veterinary Medicine,
Vol.2 No.3,
September
28,
2012
ABSTRACT: The aim of the present study was to evaluate different acaricide treatments for the control of Boophilus microplus on field-kept dairy cattle in the state of Pernambuco, Brazil. The first phase of the experiment consisted of collecting the ingurgitated female Boophilus microplus directly from the hosts for attainment of larvae. After the attainment of larvae, the artificial infestation procedure began on the cattle, with larvae ages ranging from 7 to 14 days. On Day 0, animals were separated into 12 groups to receive the corresponding treatment: Abamectin; Ivermectin; Ivermectin LA; Amitraz; Amitraz + Ivermectin; Amitraz + Ivermectin LA; Amitraz + Abamectin; Association (Cypermethrin + Chlorpyrifos + Citronella); Association + Ivermectin; Association + Ivermectin LA; Association + Abamectin; and Control. Subsequent evaluations were made on post-treatment days +7, +14, +21, +28, +35, +42, +49, +56 and +63. Analyzing the post-treatment effectiveness per day, indices revealed considerable variation ranging from 0% to 96.63%. Such indices demonstrate the significant reduction in the number of ticks on the animals in some groups, especially in the Abamectin group. The analysis of the results demonstrates that the use of different avermectines can assist in the development of Boophilus microplus control programs, thereby reducing the number of acaricide applications and production costs related to ticks.