14. POTATO-CARROT AGAR (PCA)

Grated potato 20.0 g

Grated carrot 20.0 g

Agar 20.0 g

Tap water 1000.0 ml

Boil potato and carrot in 1000.0 ml of water for 1 hour, filter cold through a cotton-gauze filter, add water to the initial volume and add agar. Do not use new potatoes.

pH 7.0-7.1

Autoclave at 121°C for 15 min.