[NCSUdart]

i always keep at least 10 culture running at all times. recently however one of my cultures had all the maggots just turn black and die. it seemed like the culture was going to have a bumper crop too, the sides of the cup were completely covered with maggots, but they just never seemed to pupate. instead they just all turned black. has anybody had this happen before? it doesnt' look like the medium itself is molding, etc.

i've removed the culture and disposed of it, but am still really curious