Figure. Sterilization using a pressure cooker, presented by David Molnar at "(DIY)-biology, Designing for Open Source Science," DIS'12 Workshop. Integrated pest management (IPM) practitioner inspects plant leaves to assess well-being of the garden. Insect larvae signifies a pest problem. Kombucha culture is a colony of multiple species of bacteria and yeast, which ferments sweet tea into an effervescent drink.