That's the problem with a whole lot of the new herbicides -- the are persistent.
There was a herbicide released last year that turned out it killed trees nearby. It was used on a lot of golf courses and by lawn services. It was pulled from the market in about only 6 months. As soon as they saw the tree damage (why that wasn't know before is a good question).
But the dead trees and any lawn clippings should not be used in mulch as they can be toxic for over 18 mts and it will NOT be deactivated in a compost pile.
How some of this stuff gets approved in the first place is the real question. Scary to think that money is most likely the grease that is moving them thru the system.
Carol
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