Would wood mulch next to building be a factor in attracting carpenter ants?
Wood mulch will most definitely attract carpenter ants. They’re quite good at detecting certain smells and decaying wood (aka: wood mulch) is number one on their list of “10 best places to live”.
Does this mean you shouldn’t have wood mulch on your property? No. If you want to keep wood mulch but not attract carpenter ants, treat with either the CARPENTER ANT BAIT or the SUSPEND mentioned in our CARPENTER ANT CONTROL ARTICLE. Baiting the mulch will be the most cost effective. As foraging ants come around, they’ll no doubt encounter some of the bait, eat it or bring it back to the nest and eventually consume some. This will have a deadly consequence and once a few ants die, the colony will recognize the source of the problem and avoid the area.
Liquid spraying with Suspend isn’t as easy to do but you will have the added benefit derived from using a residual meaning that liquid treatments will cover any invading pest. Use about 1 gallon of finished product for every 800 sq/ft of mulch and treat every 2-3 months to keep them in check. Since wood mulch tends to attract everything from termites to scorpions to roaches to springtails, treating it with a liquid would be the better of the two preventive treatments for carpenter ants.
Here are direct links to the information and products listed above:
Carpenter Ant Bait: http://www.bugspraycart.com/bait/granule/pt-advance-carpenter-ant-granules
Carpenter Ant Control: https://www.carpenterants.com/carpenter-ant-control