Essential oils at the concentration of 5 ul, 15 ul and 25 \ûof Myrtus communis L., Laurus nobilis L., Echinophora tenuifolia L., Thymbra spicata L. and Satureja hortensis L., which grow wild in Turkey were prepared and investigated for growth of Agaricus bisporus in culture media. The results showed that 25 ul concentration of essential oils showed an inhibitory effect on mycelial growth. Other concentrations of oils partly inhibited the growth of A bisporus. The mycelial growth of all samples treated had slow and different according to control group. It was observed a slow growth in sample with thyme (black), while myrtle and thyme (savory) oils exhibited fungisit effect against A. bisporus, others had fungistatic effect. © 2008 Taylor & Francis Group, LLC.