Pest control operators advised on best times for fogging

We thank Mr Joe Teo Kok Seah for his feedback and suggestions on fogging (“Time fogging to get maximum benefits”; Monday).

The National Environment Agency (NEA) provides guidance to pest control operators that fogging should be carried out in the earlier part of the morning or later part of the afternoon.

This is because ambient temperatures during these times are lower, hence allowing the fog to stay at ground level longer; the Aedes aegypti mosquitoes are also known to be most active then.