title: Resistance by the blue tick (Boophilus decoloratus) to the synthetic pyrethroid, fenvalerate.
abstract: The Shaw larval test, in conjunction with adult tick immersion and stall tests, was utilized to confirm that a field strain of B. decoloratus, from Natal, is highly resistant to the ixodicide fenvalerate (Factor of resistance 4,744). This resistance developed over a reported 18 months of usage for cattle dipping.
mesh_terms: D000818:Animals; D005069:Evaluation Studies as Topic; D005260:Female; D007305:Insecticide Resistance; D007306:Insecticides / Q000494:pharmacology*; D007814:Larva; D009570:Nitriles; D011722:Pyrethrins / Q000494:pharmacology*; D013987:Ticks / Q000502:physiology*; D013997:Time Factors
chemical_list: D007306:Insecticides; D009570:Nitriles; D011722:Pyrethrins; C017690:fenvalerate