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Use of pyrethroid impregnated tags in the control of sheep headfly disease
  1. WT Appleyard,
  2. JT Williams and
  3. R Davie


Plastic tags containing 8.5 per cent w/w cypermethrin or 10 per cent w/w permethrin reduced the severity of damage caused to sheep by the headfly Hydrotaea irritans. A similar pattern of protection extended from the tagged ewes to their untagged lambs. Tags containing 8.5 per cent w/w fenvalerate failed to reduce the level of headfly damage in gimmers.

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