Because the aqueous extracts of Syzygium aromaticum (clove), Allium sativum (garlic), Cinnamomum zeylanicum (cinnamon), Pipper nigrum (black pepper) and Trachyspermum ammi (ajwoin) is found effective against the growth of test organism. Therefore, this study suggests that aqueous extracts of these spices would be helpful in treating diseases in plants caused by A. niger. In conclusion, the findings of this experiment confirmed that plant extracts can be used as natural fungitoxicant to control the growth of pathogenic fungi (A. niger) and thus reduce the dependence on the synthetic fungicides.