On the other hand, phytotoxic effects of EOs have been studied as possible natural herbicides (Batish et al., 2012 and Rolli et al., 2014). This biological activity on seed germination is a result of accumulative effects of the whole complex such as membrane damage and chlorophyll degradation (Poonpaiboonpipat et al., 2013). Because of this scenario, phytotoxic effects on garlic seeds have to be studied to identify the appropriate EOs to control fungal diseases.