Michael from Sport,la writes
Reading the label, it appears that it is no more than every 7 days.
Bifen IT has a residual of 90 days indoors and 30 days outdoors. Repeat application should only take place if there are signs of renewed insect activity and must not exceed one application per 7 days. Please view the product label for listed insects and more information.
Answer last updated on: 06/18/2013
