The blue you see on some of the baits is the Intrigue® dust that is remaining after the termite activity has ceased. Many of these baits appear to be solid, but when you pick them up they are lighter than balsa wood because the insides are tunneled out from the activity of the diligent worker termites over a 4-10 week period. After this time, the termite activity has usually stopped and the bait is replaced with a new one. If no further activity occurs in the new bait or nearby baits, then is highly likely that the nest has been destroyed.

1 used bait = 1 dead termite colony.