These are the largest wasps found in Ohio, measuring 1 1/8 - 1 5/8" in length. The wasps have black bodies that are marked

with yellow to white patches on the first three abdominal (rear part) segments. The head, thorax and legs are rusty red and the wings russet-yellow. As with all hymenoptera (wasps, bees, etc.), only the females possess stingers (ovipositors); however, they are not aggressive.

The females spend their time digging and provisioning burrows with paralyzed cicada-prey. The males spend their time establishing and defending territories that encompass females. They will aggressively buzz any transgressor who dares to enter their territory, including people. The females prefer to dig their brood burrows in bare, well-drained soil that is exposed to full sunlight. Although the wasps are considered solitary, all of the females have the same nesting requirements. Thus, it is not unusual for there to be numerous burrows, and wasps, in relatively small areas. The males are notoriously territorial and will chase after other males as well as picnickers, golfers, volleyball enthusiasts, and gardeners. Fortunately, it's all a rouse since the males lack stingers.

Cultural practices that promote a thick growth of turfgrass will usually eliminate a cicada killer infestation in a lawn in one or two seasons. In landscapes, the wasps prefer loose soil in full sun. However, they will occasionally set-up shop in open areas that are covered in a thin layer of mulch. Deepening the mulch layer and periodical raking to disturb the mulch or adding plants to shade the soil will make conditions less favorable for the wasps. Since this is a beneficial insect, there are no insecticide recommendations specific to controlling these wasps. Education is one of the best approaches to reducing the angst sometimes caused by these wasps. Indeed, Glenwood Gardens have a nice sign posted next to one of their cicada killer colonies located in a high-traffic area to educate the public on what's really going on with these bio-allies.