Protocol CR91
From The Stargate Omnipedia
Stargate Command containment protocol applying to all S.G.C.-related operations, including Earth's interstellar ships.
CR91 specifies the elimination of a contagion from planetary orbit using an appropriate neurotoxin to eliminate to the threat. Stargate Command can then salvage the remains of technology from the surface.
Protocol CR91 may also apply at Atlantis.
KEY EPISODE
The Scourge - When it is clear that Prior bugs have overrun the Gamma Site, General Landry orders Protocol CR91 to eliminate them.