EN
The aim of presented investigation was to estimate the usefulness of a new method for determining the efficiency of acaricides against red poultry mites. The special Plexiglas plates were used in order to imitate natural conditions as close as possible. The investigation was conducted on the mites collected from 32 battery cage farms of laying hens. Nine commercial acaricides were used. The efficacy of these acaricides was investigated in four repetitions. The results showed that together with the increasing mite numbers used for the study, a standard deviation (SD) on the average of scores on four test plates underwent a reduction and did not exceed 10 for more than 80 mites per plate. At the same time, it was observed that the SD of fragmentary results was dependent on the effectiveness of the acaricides. Relatively low coefficients for the variation of the obtained results and lack of statistically significant differences for measurements obtained under conditions of repeatability (P=0.415138) and reproducibility (P=0.43594), illustrate that our method is useful for the estimation of efficacy of acaricides against Dermanyssus gallinae mites.