1. Suspend 39 grams PDA in 1000 ml distilled water.
2. Add 100 µl of Triton X-100 to the above solution. Mix well and heat with frequent agitation until the medium boils well. Heat it to dissolve the medium completely.
3. Sterilize by autoclaving at 15 lbs pressure (121°C) for 15 minutes. Mix well before dispensing.
4. Dispense the media aseptically into sterile petri-dishes. Media in petri-dishes are ready to use.
Please note: A specified amount of sterile tartaric acid (10%) may be incorporated to lower the pH of the medium to 3.5 so that bacterial growth is inhibited. The amount of acid required for 100 ml of sterile, cooled medium is approximately 1ml. Do not heat the medium after addition of the acid.
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