Assessment Of Susceptibility Of Poultry Red Mites (Dermanyssus Gallinae) Against Commercial Used Acaricides

The main objective of the performed experiments was assessment of susceptibility and resistance poultry red mites (Dermanyssus gallinae), from two farms with cages system of egg-laying hens in the Czech Republic in 2019, against three commercially used acaricides (Milba STOP ultra, Elector, Poultry Shield) by Method No. 11 from IRAC (Insecticide Resistance Action Committee) Susceptibility Test Methods Series. This is in vitro direct contact method. According to the method concentrations of acaricides were used as follow: 0% (acetone only control); 4%; 20%; 100%; 500% of the recommended field application rates. All used commercial acaricides caused mortality of poultry red mites in all their stages of development. The assessment of susceptibility and resistance of PRM (Poultry Red Mites) against commercially used acaricides by Susceptibility rating scheme showed, that PRM were highly susceptible to acaricide Poultry Shield on the both farms, moderately resistant on the Farm 2 and highly resistant on the Farm 1 against acaricide Milba STOP ultra and highly resistant against acaricide Elector on both farms.