Ticks arc widely distributed, obligate hematophagous ectoparasites of domestic ,wild animals and humans. On global basis, ticks transmit a larger number of pathogenic organisms like protozoans, rickettsial spirochetes and viruses than any other arthropod group, and are among the most important letore of pathogens affecting livestock, humans and companion animals. Ticks are incriminated as voracious blood suckers, causing low quality hides, secondary bacterial infections. lowered productivity in terms of weight gain and milk yield. Although efforts are increasing to establish integrated tick management system as a part of sustainable programme, the campaign for tick control still depends on repeated use of harmful synthetic acaricides which leads to the development of resistance, harmful effects on human and environment from residual toxicity in meat, milk, milk products and on living biota. To achieve the successful control of acaricide resistant ticks, attempts have been made towards the identification of herbs having acaricidal properties and formulation of herbal acaricides, which are safe for animal use, and there will be less chance of development of resistance to herbal formulations with no possibilities of evoking environment and residual toxicity. In the present invention, the acaricidal properties of one commonly available plant. Ageratium conyzoides, has been established. A. conyzoides (family Asteraceae) is a common tropical annual herbaceous weed which is commonly known as Billy goat weed, Jangli pudina. Ghabuti, Bhakumbar etc. It is distributed throughout India and minimum agronomical conditions are required for mass cultivation. For extraction and fractionation, the whole plant of A. conyzoides was collected from its natural habitat and dried, powdered, extracted in 95% elhatiol and concentrated. The extract was fractionated using hexane, chloroform, butanol and water and the antitick activity was established. The LC90 value of the extract was determin
