title: Comparison of in vitro acaricidal effects of commercial preparations of cypermethrin and fenvalerate against Rhipicephalus (Boophilus) annulatus.
abstract: Commercially available preparations of cypermethrin (Clinar and Ectomin) and fenvalerate (Flytik and Ticomax, 20% E.C) were compared for their acaricidal activity against Rhipicephalus (Boophilus) annulatus using adult immersion test. Adult tick mortality was higher with Ectomin compared to Clinar. Complete eclosion blocking was observed at all the tested concentrations with Ectomin while it was observed only at the highest concentration tested for Clinar. Compared to Flytik, adult tick mortality was higher with Ticomax at the tested concentrations. Complete blocking of hatching of laid ova was observed with Flytik at the highest concentration tested. At the manufacture recommended dosage of 200 ppm Ectomin elicited 93.37 per cent inhibition of fecundity, while it was 91.7 per cent for Clinar. For fenvalerate, the recommended concentration was 1200 ppm at which Ticomax showed 86 per cent and Flytik produced 80.05 per cent inhibition of fecundity respectively.
authors.affiliation: Department of Veterinary Parasitology, College of Veterinary and Animal Sciences, Pookode, Wayanad, Kerala 673 576 India.
authors.forename: Reghu
authors.initials: R
authors.lastname: Ravindran
authors.affiliation: Department of Veterinary Parasitology, College of Veterinary and Animal Sciences, Pookode, Wayanad, Kerala 673 576 India.
authors.forename: Sunil Athalathil
authors.initials: SA
authors.lastname: Ramankutty
authors.affiliation: Department of Veterinary Pharmacology and Toxicology, College of Veterinary and Animal Sciences, Pookode, Wayanad, Kerala 673 576 India.
authors.forename: Sanis
authors.initials: S
authors.lastname: Juliet
authors.affiliation: Department of Veterinary Parasitology, College of Veterinary and Animal Sciences, Pookode, Wayanad, Kerala 673 576 India.
authors.forename: Adarsh Krishna Thumadath
authors.initials: AK
authors.lastname: Palayullaparambil
authors.affiliation: Department of Veterinary Parasitology, College of Veterinary and Animal Sciences, Pookode, Wayanad, Kerala 673 576 India.
authors.forename: Jyothimol
authors.initials: J
authors.lastname: Gopi
authors.affiliation: Department of Veterinary Parasitology, College of Veterinary and Animal Sciences, Pookode, Wayanad, Kerala 673 576 India.
authors.forename: Ajith Kumar Karapparambu
authors.initials: AK
authors.lastname: Gopalan
authors.affiliation: Department of Veterinary Pharmacology and Toxicology, College of Veterinary and Animal Sciences, Pookode, Wayanad, Kerala 673 576 India.
authors.forename: Suresh Narayanan
authors.initials: SN
authors.lastname: Nair
authors.affiliation: Division of Parasitology, Indian Veterinary Research Institute, Izatnagar, Uttar Pradesh 243122 India.
authors.forename: Srikanta
authors.initials: S
authors.lastname: Ghosh
keywords: Acaricidal activity; Cypermethrin; Fenvalerate; Rhipicephalus (Boophilus) annulatus