|Tomato with Herbicide Damage|
After adding manure to our soil last year, our tomatoes have not had a chance. We received slightly aged horse manure from a friend of ours in Gilpin County. We were unaware the manure had small traces of Milestone herbicide (Aminopyralid). The herbicide was used in the horses’ grazing fields to treat noxious weeds.
Milestone is a popular herbicide used throughout the county. It is not harmful to animals and does a great job at killing noxious weeds. Livestock graze fields and munch on what is left of the noxious weeds. The Milestone passes through their systems, and because it is persistent, it shows up later in manure, damaging sensitive crops like tomatoes and beans. It has much less effect on leafy greens.