Walks out to shed and grabs Roundup Brush Killer concentrate purchased at Lowe's last week... looks like the label claims active ingredients of triclopyr triethylamine salt 2.5%, fluazifop-P-butyl 2.0%, diquat dibromide 1.5%. That's what I purchased here in the Bay Area; interestingly enough Home Depot doesn't carry the brush killer and claims it is not available in California but I've always been able to purchase it at Lowe's. We have 2 acres of poison oak forest that I've been working to eliminate. Once I've purchased enough Tecnu to counter the effects of the oil we'll go in and clear it out manually. I'd love to use goats but they are really quite expensive.