The susceptibility of the poultry red mite, Dermanyssus gallinae (De Geer, 1778), to some acaricides under laboratory conditions.

Toxicity of 14 selected acaricides was tested for a laboratory strain of female D. gallinae. The most toxic were carbaryl (LC50 = 5.0 micrograms/m2), deltamethrin (LC50 = 7.8 micrograms/m2), bendiocarb (LC50 = 11.1 micrograms/m2), and permethrin (LC50 = 12.6 micrograms/m2). High level resistance to DDT in D. gallinae was recorded, with factors of resistance at LC50/LC90 reaching 57/73.