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.

Introduction: C. curviflora, an important ethno-medicinal plant used by the Kurichia local people in Western Ghats region of Wayanad is yet to be explored pharmacologically. It is used as paste on the body of cattle and birds for curing skin diseases. Objectives: To characterize the pharmacochemical features and to study the acaricidal effect of ethanolic extract of C. curviflora on engorged female ticks of R. (B.) annutatus. Methods: The pharmaco-chemical features such as physico-chemical, proximate, phytochemical, fluorescence, and HPTLC profiling were carried out using standard techniques. The pulverized leaves were subjected to soxhlet extraction using ethanol. The ethanolic extract at different concentrations (10% to 1.25%) was tested against ticks using adult immersion test (AIT). Result: The preliminary phytochemical investigation showed high contents of saponins, alkaloids and flavonoids. The HPTLC profiling of ethanolic extract showed the presence of 14 polyvalent components. Based on AIT, the extract at 10% revealed 43.76% of inhibition of fecundity (IF) and 29.16%

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