A Blackberry Knot Gall Wasp gall in Allegany Co., Maryland (6/4/2016). Photo by Andy Gougherty. (MBP list)
A Blackberry Knot Gall Wasp gallin Harford Co., Maryland (3/17/2018). Verified by Charley Eiseman/BugGuide. Photo by Dave Webb. (MBP list)
Blackberry Knot Gall Wasp in Baltimore Co., Maryland (1/23/2020). (c) Emilio Concari, some rights reserved (CC BY-NC). Photo by Emilio Concari. (MBP list)