Right, I dissolve 39g potato-dextrose with 5g agar in one liter water, I adjust the ph, I sterilize it for 20 min, I pour it in 20 dishes, I wait a couple of days to see if I worked sterile enough, then I innoculate them If you do not wait, you have chance to innoculate a petri which isn't sterile anymore...
The biologist I work with told me to do so, he works with tissue-culture (orchids, meat-eaters, aquarium plants and much more)
The biologist I work with told me to do so, he works with tissue-culture (orchids, meat-eaters, aquarium plants and much more)