Dirt Dauber Wasps: Beneficial Nest Builders

Mud tubes on a structure were identified as nests of dirt dauber wasps. These solitary wasps are beneficial—they provision their tubes with paralyzed spiders (including black widows) and lay eggs on the prey. If the nests become a nuisance, surface sprays of cypermethrin, deltamethrin, or permethrin every few weeks can deter them.

dirt dauber nest

dirt dauber nest