The appeared tolerance of the G. etunicatum ribotype(band x.9) to nicosulfuron observed in our study is in accordance with previous observations. It is noteworthy that Ipsilantis et al.(2012) found a G. etunicatum ribotype with increasing tolerance to azadirachtin. Similarly Schreiner and Bethlenfalvay (1997)reported an elevated tolerance of G. etunicatum to high concentrations of different fungicides compared to other Glomus Species tested. Although these results provide a first indication of a possible species-dependent tolerance to pesticides more studies are needed to verify if this attribute for G. etunicatum is an inherent characteristic resulting from physiological traits.