Eficácia da associação de Dinotefuran, Piriproxifen e Permetrina no controle de Psoroptes ovis (Hering, 1838) (Acari: Psoroptidae) e de Ctenocephalides felis felis (Bouché, 1835) (Siphonaptera: Pulicidae) em coelhos (Oryctolagus cuniculus)

Abstract

The purpose of the present study was to evaluate the efficiency of neonicotinoide dinotefuran and permetrin piretroid with insect growth inhibitor piriproxifen association, in the control of psoroptic mange in naturally infested rabbits with Psoroptes ovis and in the control of artificial infested rabbits with Ctenocephalides felis felis. For the pulicidal efficiency evaluation, 12 rabbits were divided into two groups, infested with 100 Ctenocephalides felis felis fleas on the -7, -2, +5, +12 and + 19 days. The control group did not receive treatment and the treated group received the formulation on the 0 day. The parasites were manually removed with combs (comb test) on the -5, +2 + 7 + 14 + 21 days, All removals and flea counts were made by body regions for the purpose of identification of the preferential feasting áreas of the C. felis felis fleas in rabbits. The statistical analysis was preformed by the Bioestat 5.01 statistical software. To determinate the acaricidal efficiency, 18 rabbits were used, divided into 3 groups, ranked by the otitis score. The group 1 was controle, the group 2 animals received one drop in each ear of the association and the remaining volume was aplied on the animal`s dorsal line, the group 3 animals received the same product as the group 2, but the volume was aplied only on the animal`s dorsal line. The ear crusts were weekly colected and the otitis score evaluated. The statistical analysis was preformed by the Bioestat 5;01 statistical software. Initially the nomality of the data of each experimental day was evaluated (mite per gram of crust count). After verified the parametric or non-parametric distribuition type, the type of the comparison of the mean was chosen. On the parametric data the T Teste was applied. On the non-parametric the Mann Whitiney was applied. Regarding the results of the flea infestation, the body distribution of the fleas prevailed the head region (about 62%), fallowed by the neck and dorso (14 and 11% respectively). The insecticidal efficiency was mesured by aritimectics methods being 100% on the +2 and +7 days, and 82.2% and 81.6%, on the +14 and +21 days, respectivally. The residual period of the aplied product was of 21 days, being considered an viable option on the C. felis felis infested rabbits. Regarding the mite control efficiency, from the +7 day foward , no living mite was found on the group 2 animal`s ears crust (100% efficiency), while the group 3 on the same experimental Day, got only efficiency of 52%. The efficiency kept above 95% on all the group 2 evaluations, reaching 99% o the last evaluation (+35). On the 3 group, on the +14 day, the efficiency droped to 36% and then increased to 82, 94, 99% o the +21, +28 and+ 35 days, respectively. The topic formulation of dinotefuran (4.95%), piriproxifen (0.44%) and permetrina (36%) is effective on the P. ovis mite and C. felis felis infestation controlo n rabbits.