The inhibitory activity of the flour substance attached to the growing tip of the palm tree and the pomegranate peel substance was tested on the spores of the fungus Curvularia clavata. The results showed a high percentage of the effect of the two substances on the fungus spores. A concentration of 1 g/L gave a higher effect on the fungus spores, while pomegranate peels gave a concentration of 10 g/L. The effect of both was significant, especially at the two mentioned concentrations compared to the control treatment, as the yellow substance treatment gave a greater effect when compared to the pomegranate peel treatment. Time also affected the spores of the fungus, especially on the seventh day. In addition, it was noted through the results that there were significant differences in the interaction of time with the treatments, especially in the yellow substance treatment and the pomegranate peel treatment compared to the control. The same is the case when the interaction of time with the concentrations gave a significant effect, especially at the concentration of 10 g/L. The interaction of the treatments with the concentrations gave great results in the effect between the treatments and concentrations, especially the yellow substance treatment, as well as the Pomegranate peels when compared to the control, in addition to the interaction between the experimental factors had a significant effect on the bactericidal effect of C.clavata compared to the control treatment.