The catch bag is to be used with the BG-Mosquitaire trap. It is attached to the intake funnel over the funnel net. It catches the mosquitoes that are sucked in by the ventilator.
Damaged catch bags should be replaced. With time, catch bags might become clogged with dust, pollen, or dirt resulting in a greatly reduced air flow into the trap and a decrease in trapping efficacy. Control catch bags regularly and clean or replace them if necessary.