Q&A: Drain flies, powderpost beetles, honey bees and gnats
Dr. Doug Mampe
Q: In a hospital sterile area, a janitorial closet has a drain fly problem. A vent stack for the drain system opens about 4 ft. above the floor. The elbow (trap) is dry. I shouldn’t use any pesticides in this area, but I can’t close off the stack. How can I solve this problem? — Rick […]
