Al-Tamimi , S.N. and Hawar , S.N. 2025. Efficiency of Nano powders of Cloves, Cinnamon, and Turmeric in Ochratoxin A (OTA) production by Penicillium polonicum. Ibn AL-Haitham Journal For Pure and Applied Sciences. 38, 4 (Oct. 2025), 64–74. DOI:https://doi.org/10.30526/38.4.4134.