03-11-2019, 11:07 AM
Aminopyralid, the herbicide in Milestone, does not have nearly as long of a half life as chlordane, but it can linger for over a year. It’s been used more and more heavily to control albizia across the windward side. I’d be wary of using mulch from treated albizia. I’ve seen Milestone described as safe as a bit of spilled motor oil on Punaweb.
“Under aerobic conditions, degradation of aminopyralid in five different soils resulted in the production of CO2 and non-extractable residues. Half-lives ranged from 31.5 to 533.2 days in 5 soils. For risk assessment purposes, EPA used a half-life of 103.5 days.”
https://www3.epa.gov/pesticides/chem_sea...Aug-05.pdf
Edit: a word.
“Under aerobic conditions, degradation of aminopyralid in five different soils resulted in the production of CO2 and non-extractable residues. Half-lives ranged from 31.5 to 533.2 days in 5 soils. For risk assessment purposes, EPA used a half-life of 103.5 days.”
https://www3.epa.gov/pesticides/chem_sea...Aug-05.pdf
Edit: a word.