Greenhouse and field experiments were conducted in 2013 and 2014 to study the effect of some essential plant oils, namely cumin, cardamom and their mixture on incidence of peanut pod rots, occurrence of aflatoxigenic fungi (Aspergillus flavus Link and A. parasiticus Speare) and seed aflatoxin content. Effect of cumin, cardamom and their mixture were tested at five concentrations (0.25%, 0.50%, 1%, 2% and 4%), on the linear growth of Fusarium moniliforme, Macrophomina phaseolina, Rhizoctonia solani, Sclerotium rolfsii, Aspergillus flavus and A. parasiticu. Mix treatment had the strongest and most extensive inhibitory effect on all tested fungi followed by cumin oil. Reduction in linear growth increased by increasing concentration of the tested plant oil from 0.25% up to 4%. Extended greenhouse and field trails for two successive seasons 2013 and 2014 proved that the application of essential oils significantly reduced peanut pod rots incidence as well as increasing of peanut pod yield. In this respect, mix treatment followed by cumin at 2% were the highest effective treatments while cardamom at 0.5% was the lowest one. Data also confirmed that, increasing the concentration of plant oils perform to increase their effect in reducing of all peanut pod rot types. Concerning aflatoxigenic fungi and aflatoxin contamination, isolates of A. flavus were more invasive to seeds than A. parasiticus. The most effective treatments were mixture treatment followed by cumin at 2% which gave the least incidence of A. flavus and A. parasiticus and reduced preharvest aflatoxins contamination during the two successive seasons 2013 and 2014.