Abstract

ROSSNER, María Victoria; GOMEZ, Viviana Daniela; MOREL, Nicolás  and  NAVA, Santiago. Evaluación de un esquema de control integrado de Rhipicephalus (Boophilus) microplus en vacas preñadas y con cría en el noreste argentino. FAVE, Secc. Cienc. vet. [online]. 2022, vol.21, e0003. ISSN 2362-5589.  http://dx.doi.org/https://doi.org/10.14409/favecv.2022.0.e0003.

The aim was to evaluate an integrated control scheme for Rhipicephalus (Boophilus) microplus in pregnant and calving cows combining two treatments with chemical acaricides and paddock rest in a representative locality of northeastern Argentina. This scheme was designed to combine the therapeutic effect of strategic control (two treatments applied between late winter and spring) with the rest of pastures (in the present work of three months) on the amount of larvae present in a paddock. Twenty-two Braford-type heifers and cows were divided into two groups in paddocks naturally infested with ticks, with a rest of three months before the animals were admitted. Group I received two acaricidal treatments with fluazuron and flumethrin and group II remained without treatment as a control group. Tick ​​infestation was monitored monthly and therapeutic efficacy was calculated. The infestation with Rhipicephalus (Boophilus) microplus in group I was significantly lower than that of the control group and the efficacy levels were always higher than 93%, with the exception of the February count, where the efficacy was 89.1%. The complementary integration of the partial decontamination applied through a three-month pasture rest with a strategic treatment scheme (two in a 10-month period) allowed reaching significant levels of efficacy in the control of Rhipicephalus (Boophilus) microplus while maintaining low levels of infestation with minimal movements to management pens, and providing sustainability to the use of acaricides.

Keywords : ticks; control; pregnant cows; Argentina.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )