How would you prevent the essential oil from evaporation in an agar well diffusion method?

I found this research article where they did tested the antimicrobial activity of some plant oils using Agar Well Diffusion ( Esmael, A., Hassan, M. G., Amer, M. M., Abdelrahman, S., Hamed, A. M.,...

01 January 1970 7,967 3 View