Apr 12, 2014 - 07:34 AM
The drench method is basically this - fill a 5 gallon bucket full of chemical (mixed with water of course) and pour it into the ant mound. Usually 3-5 gallons of chemical is enough to kill the average ant mound. For extra large mounds, you may need more, for smaller mounds use less.
You can also use a bucket with a small drip hole drilled into the bottom of the bucket. A really small 1/8" hole will work. Fill the bucket quickly with water, take it to where the ant mound is, place the hole in the bottom of the bucket over the center of the mound, pour the desired amount of chemical concentrate into the water, stir with a stick very quickly and then leave. Let the chemical in the bucket slowly drip into the mound and this will have a huge impact on the nest.
This method works well for harvester ants, leafcutter ants and other ground inhabiting ants. If treating for these ants, use a large bucket if possible, the larger the better. Some people use a 55 gallon drum for leafcutter ants and report great results. You would need a source of water for this as it would be too heavy in most cases.
If none of these methods sound appealing, then use a granular ant bait such as Maxforce Fire Ant Bait. This way the ants pick up the bait and carry it down into the mound for you.