Hey Hey I am a new grower and my yungins are exhibiting the same thing... It does not seem to spread to the other (new ) leaves if I move them out of direct southern sunlight or indoors. but I have also sprayed with one of the comercial vegatable insecticides. So I dont know what is really helping.I have enclosed some picts...
The baby started from seed is about 18 inches now in a 10 in pot with MG potting soil and an MG time release fert. I now let it outside for about 6 hrs then move inside by a sunny window. water once a week or put it in a nice rain down pour