author(s)
G Bordoloi, PC Sarmah, JB Dutta, PK Boro, K Saikia, K Boruah, S Khargharia, LS Khuman, B Borah, UR Tamuli, P Chabukdhara and A Baruah

abstract
Haematobia flies are the most widespread and economically important blood feeding ecto-parasite of cattle and buffaloes. The bite of flies’ cause stress and restlessness condition that grossly affects the health of animals. The present communication reports occurrence of heavy infestation of cows with Haematobia flies in a newly established cattle farm of the Lakhimpur College of Veterinary Science, Assam. Cows affected with Haematobia flies were treated with Flumethrin (Flumitas) Pour-on solution (1% w/v), by application once on the back of the animals along the vertebral columns at a dose rate of 10 ml/100 kg body weight. This resulted not only rapid disappearance of the flies from the treated animals but also complete reduction of fly population from the cattle shed. The animals found free from fly attack were looked to have overcome the pre treatment stress. The pour-on treatment also resulted in total milk yield increase from 25 litres to 27 litres per day in the farm thus accounting 8% gain in the milk yield. Flumethrin pour-on appeared to have a strong repellent effect that helped in alleviation of stress in animals due to fly burden.