The best I can tell on this topic that Diazinon and Durban were supossed to be pulled from the shelves 2 years ago. It was pulled because people wouldn't follow directions 1lb per 100 sq ft per month. Golf courses used this stuff weekly, some homeowners were using 10lbs per 100 sq ft per week next to their foundations where kids play. They didn't read the directions "Keep Out" for 24 hours after applications, killing pets and kids. I am not an Ortho/Monsanto supporter but I am for personal responsibility. L.B.