[Effect of the urea fertilization in pasture on Rhipicephalus (Boophilus) microplus (Acari: Ixodidae)].

The objective of this study was to verify the effect of the urea fertilization in pasture on Rhipicephalus (Boophilus) microplus population in free living stage. Two groups had been made, a control group and a urea treatment group, each group with 10 lots of Mombaça grass (Panicum maximum cv. Mombaça).

[Control of Anocentor nitens (Neumann, 1897) (Acari: Ixodidae) on equines].

This trial evaluated control practices of Anocentor nitens on equines, using spraying devices and application of acaricide paste formulation in the auricular pavilion and nasal diverticulum. The study was carried out from October 2003 to March of 2008 and the evaluations had been divided in the following stages: Phase 1--out/03 mar/04 and Phases 2, 3, 4 and 5, respectively, correspondents to the month's periods until março/08. It was used score of 0 to 3 to classify infestation levels.

[Strategic control of Amblyomma cajennense (Fabricius, 1787) (Acari: Ixodidae) on horses, Minas Gerais, Brazil - Part I].

The aim of this study was to verify the efficiency of a strategic control program of Amblyomma cajennense in horses under field conditions. Acaricide treatments were applied at seven days intervals and divided in two series, the first one beginning in April 2004 (eight treatments), and the second one beginning in July 2004 (five treatments), aiming to control larvae and nymphs of the tick. A pyrethroid chemical base cypermethrin 0.

[Effect of the strategic control of Amblyomma cajennense (Fabricius, 1787) (Acari: Ixodidae) on the population of Anocentor nitens (Neumann, 1897) (Acari: Ixodidae) in equines].

The objective of this study was to evaluate the effect of the Amblyomma cajennense strategic control program on the Anocentor nitens population. The acaricide treatments were carried out every seven days and divided in two series, the first one beginning in April 2004 (eight treatments) and the second beginning in July of the same year (five treatments), using pyrethroid chemical base - cypermethrin in the concentration of 0,015%. Monthly it was evaluated the infestation of A.