If the bumble bee built there nest under the ground, spray directly into the entrance, if you can not find the entrance, spray the surrounding area. It will take approximately 1-2 gallons of dilution for each nest area.Spray the nest until wet and apply a 4 foot diameter circle around the nest.umble Bees do not dig holes or make tunnels in the wood; however they will nest in vacant rodent burrows, under piles of grass clippings or leaves, stones, logs, etc. Once in a while bumble bees will build a nest above the ground and they are usually on a wall, firewood pile, sheds, crawl spaces, or attics.