Thripline and Trapline +
Thripline is a pheromone specific to Frankliniella occidentalis which is an aggregation pheromone that will attract adults to the trap. Addition to normal yellow traps in the form of a lure/ rubber septum which is attached to the trap increases the attractiveness of the traps to WFT. Addition to a yellow trap will make it just as effective as a blue trap.
Trapline + is a trap where the pheromone is incorporated into the glue during manufacture.
The pheromone can also be used as a spraying aid, causing the adults to emerge from the crop where they are hide to make contact with a PPP more likely.