Cooke Rose Bengal Agar is a selective medium for the cultivation and isolation of fungi. In this medium, Rose Bengal and Chlortetracycline inhibit bacterial growth and restrict colony size of rapidly-growing molds. Papaic Digest of Soybean provides nitrogenous sources, carbohydrates, and vitamins. Dextrose is the fermentable carbohydrate. Monopotassium Phosphate serves as pH buffer and Magnesium Sulfate supplies divalent cations. Agar is the gelifying agent.