Pasteurisation means heating straw enough to kill or weaken competitor moulds without sterilising it. Hot water is the simplest route.
The DMR folder soaks straw overnight, then heats the water to 60-65 C and holds the straw in it for 20-30 minutes. The 2011 manual gives longer schedules: 65-70 C for one hour, or 60-120 minutes at 80 C, or paddy straw at 85 C for 30-45 minutes. Both are DMR; the folder is the seasonal grower protocol.

