The current need of identification of a new acaricidal agent which is acceptable to public as environmentally
safe is a daring task. Use of herbal acaricides is such an alternative. Most of the herbal extracts or
fractions are dissolved in polar or non-polar solvents or detergents before tested for acaricidal activity.
The solvent or detergent to be used for dissolving the herbal extract should be of little acaricidal activity.
In the present study, experimentations were carried out on adult engorged female ticks to detect
the toxicity of different solvents, viz. hexane, petroleum ether, n-butanol, isopropyl alcohol, chloroform,
glycerol, ethyl acetate, acetone, ethanol, and methanol. The study revealed that methanol was the least
toxic solvent against Rhipicephalus (Boophilus) annulatus.