Fig. 2.

Internal oxygen levels (v/v%) in the PICS bags sealed with different sealing methods. Top: low-infested bags; bottom: high-infested bags. 1. Infested bags: TT = Conventional Twist-tied, IR = Inner liner rolled and outer fold-tied, FT: Both liners folded and tied together, FS: Both plastic liners folded and tied separately; 2. Control, non-infested, bags: TTN = Conventional Twist-tied, IRN = Inner liner rolled and outer fold-tied, FTN: Both liners folded and tied together, FSN: Both plastic liners folded and tied separately.