[The acaricidal activity of pyrethroids against Ixodes persulcatus P. Sch. nymphs].

The efficiency of 9 drugs based on cipermethrin, deltamethrin, permethrin, lambdacigalothrin, ciphenothrin, phenothrin against hungry I. persulcatus nymphs was studied in the laboratory setting. The values LD50 and LD99 (in g of an active ingredient per m2) were found when the nymphs got into contacts with the treated filter paper for 10 sec and 1 min. The paper discusses whether the pyrethroids as part of attractant-acaricidal granules can be used to suppress the size of ticks in the tick-borne encephalitis foci.