To kill ground bees effectively and safely, consider the following methods: 1. Vinegar Spray
Mix equal parts water and white vinegar in a spray bottle and apply it directly to the bees and their nests. Vinegar is lethal to bees and many other insects, making it a straightforward DIY option

. 2. Hot Soapy Water
Boil water and mix in soap, then pour this mixture down the entrance holes of the ground bee nests. This drowns the larvae inside the nests and can reduce the bee population

. 3. Powdered Boric Acid or Diatomaceous Earth
Sprinkle powdered boric acid or food-grade diatomaceous earth around the nest entrances. Diatomaceous earth dehydrates the bees and deters them without harsh chemicals. Reapply after rain or watering to maintain effectiveness

. 4. Block Nest Entrances
Cover nesting holes with heavy objects like flat stones or bricks to prevent bees from entering or leaving. This can encourage the bees to relocate elsewhere

. 5. Frequent Watering and Lawn Care
Ground bees prefer dry soil. Regularly watering your lawn and planting grass in bare patches can discourage bees from nesting in your yard

. 6. Natural Repellents
Sprinkle cinnamon around nest entrances. Bees dislike the smell and may move away

. 7. Professional Removal
For large infestations or nests in high-traffic areas, hiring a professional bee removal specialist is recommended. Professionals can safely remove and relocate bees, preserving their ecological role while protecting you

. Cautions:

• Ground bees are important pollinators and generally non-aggressive. Use lethal methods only when necessary.
• Apply insecticides carefully to avoid harming beneficial insects and the environment

• Perform treatments in the evening when bees are less active to reduce stings

These methods combine physical, chemical, and natural approaches to effectively kill or deter ground bees while considering safety and environmental impact.