How do you could colonies that spread too quickly or irregularly? I have a poorly drawn picture I can try to explain. The colonies spread so rapidly and irregularly that I cannot get a good count. Even using serial dilutions I run into a problem where all of my dilutions with growth are large and spread and the next dilution there is no growth.
In the same vain, how do you count mold that has grown over the entire plate?
Any insight is greatly appreciated.