Patterns of resistance in five samples of ethion‐resistant cattle tick(Boophilus microplus)from New Caledonia

Abstract
The responses of five samples of the cattle tick Boophilus microplus (Canestrini) from New Caledonia to two carbamate and five organophosphate chemicals were determined by laboratory dosage‐mortality tests on 2–3‐week‐old unfed larvae. Data show that acaricide resistance in New Caledonia has some similarities to the pattern of response exhibited by the Ridgelands, Mackay or Tully strains in Australia. Other registered acaricides are reviewed and alternative ways of tick management are considered.