Prevention and Inaction
To prevent bumble bees from choosing to nest in high traffic areas, keep your yard free of organic debris like mulch and large flat objects with an open space underneath, like large boards or other building materials. Fill in any open spaces beneath high traffic rocks or other flat surfaces. Bees will die naturally in cold weather, so if you do find a nest and it is in a location where the bees are not bothering anyone, it is best to leave it alone until the bees die naturally. When this occurs you can safely discard the nest, clean the area with biodegradable soap and patch any holes to discourage a new queen from choosing the site for nesting in the spring.
Preparation
When preparing to remove a bumble bee nest you must consider safety. Although not all bumble bees have stingers, getting stung is a real possibility. Never attempt to remove a bumble bee nest if you are unsure if you are allergic to bees. You must don protective clothing. Clothing should be thick, and no skin should be exposed. Leather gloves and a veil over your head are necessary to avoid getting multiple stings. If you are uncomfortable with the task, locate a beekeeper or pest control professional in your area. For help, visit pestcontroldirectory.com.
Chemicals
Using chemicals should be a last resort. The type of insecticide used depends upon the location of the nest. If you cannot find the entrance, you should use a spray. If you can easily locate the entrance, dusting works best. For both types of applications, be sure to read all directions and warnings on the packaging and follow them closely, as misuse of insecticides can be harmful to humans and pets. Timing is also a factor. To kill the most bees on the first application, apply chemicals during twilight hours when the most bees are in the nest and they are the least active. Oftentimes you will need multiple applications.