On 12/07/16 11:28, Don Wiss wrote:
On Tue, 12 Jul 2016, Jeff Layman wrote:

And what do you do with the dead weeds?

Once a week my mom's town picks up the yard debris to send to composting.
Stinger is used on food crops up to 45 days before harvest. I would think
by the time the compost is made the herbicide will be gone.

Unfortunately not. Just google "clopyralid" and "persistence" - for
example see http://compostingcouncil.org/persist...rbicide-faq/#1

Not long ago in the UK a number of composts had to be removed from the
market. When used to grow produce such as tomatoes, beans, and some
ornamentals the effects were very damaging - see
https://www.rhs.org.uk/advice/profile?PID=477

--

Jeff