SUSCEPTIBILITY OF THE CAT FLEA, CTENOCEPHALIDES-FELIS (SIPHONAPTERA, PULICIDAE) TO 4 PYRETHROIDS

The amounts of active ingredient required to kill adult Ctenocephalide s felis fleas on filter insecticide impregnated papers were determined in an attempt to compare the activity of different active ingredients . The following compounds were tested: bioallethrin, deltamethrin, esb iothrin and permethrin. The LD50 and LD90 against Ctenocephalides feli s were 121 and 770 mg/m(2) respectively for bioallethrin, and 161 and 671 mg/m(2) respectively for esbiothrin. For deltamethrin and permethr in, the LD50 were 0.38 and 23 mg/m(2) respectively, and 15 and 60 mg/m (2) respectively for LD90.