The cycle can be started at any time of year. After the change date, if there were any blue dispensers still in place, they have not been changed and require attention. A simple colour coding system such as this can prevent the problems arising from unchanged lures within a working monitoring system. Although human error will always be a factor, colour coded dispensers reduce the confusion between fresh and spent dispensers whilst they are in the process of being changed, and also at any stage of the programme, by any member of staff. It has been said that information is one of the main weapons in the fight against pests.
Unreliable information can be more harmful than no information.