Three predatory mite species, Phytoseiulus persimilis (Athias-Henriot), Neoseiulus cucumeris (Oudemans) and Neoseiulus californicus (McGregor) and biocide certimec were evaluated as potential biological control agents for Thrips tabaci (lind.) and Aphis gossypii (Glover) on two eggplant cultivars in open field at Behaira Governorate. Field releases of different numbers of mites per plant during 2008 season showed that Neoseiulus cucumeris reduced the number of thrips and aphid in two cultivares of eggplant. We found that earlier releases (averages from 20-25 individuals / leaf) resulted in reducing thrips and aphids numbers and lowering their damage. We conclude that inoculative release of Neoseiulus cucumeris one of a potentially useful thrips and aphids management strategy, but needs improvements in release timing and strategy will be required to provide commercially acceptable control.