Russel,
Cooking the peat is a bad idea and mircowaves don't
sterilise things anyway. Very urban myth! Anyway, what seed
are you sowing? Using bright light and good air flow should
keep the fungus at bay. If you do get some, kill by using
a spray bottle. By hitting the mycillia (sp?) with a strong
stream of water will kill it, this often more effective than
the fungicides I've tried. Maneb has proven it's worth, though
I haven't using it on seedlings...
Dave Evans