Bumblebees help your yard by pollinating flowers and plants in your garden, but if you have a phobia or an allergic reaction to bumblebees, the risks of having bumblebees around outweigh the benefits. The fuzzy, small, yellow and black striped insects make their homes inside cavities in your yard's soil or in the stalks of any agave or yucca plants, but you probably see them most often when they buzz around the nectar or pollen producing plants.
Clean your yard and remove all debris. Search your yard during the day for holes in the ground, and pick up large rocks, bricks and other flat bottomed objects to look for nests underneath them. Once you've located the nest, don't disturb it. Carefully back away without replacing the nest's cover, if there was any; you can return at night to take care of the nest.
Cover the front of your flashlight with the red cellophane sheet and secure it to the front of the flashlight by wrapping a rubber band around the rim and over the sheet. Wear your long sleeved shirt tucked into your full-length pants. Tuck your pants into your socks and wear close-toed, sturdy shoes.
Wait until dark falls; according to the "Texas Bug Book," after dark, bumblebees return to their home in nearby soil cavities. Return to the nest, using your flashlight to guide your way; the red light won't be visible to the bumblebees, and therefore won't alert them to your activities.
Pour your chosen insecticide material into the hole. To eliminate bumblebees, you can use dust or liquid insecticide, citrus oil or a bottle full of soapy water, depending on what you have on-hand. Cover the hole with a large rock immediately after putting the material into the hole.