Horse Owners and Equestrian Businesses
In the past year, we have received a number of enquiries from gardeners and allotment holders in the UK who may have used manure containing aminopyralid residues as a fertiliser and have requested further information about the potential for such herbicide residues to damage certain sensitive crops.
The manure possibly came from farm animals or horses that had eaten pasture or conserved forage from grassland treated with a herbicide containing aminopyralid as the active ingredient.
Here are some facts about aminopyralid for horse owners and those in charge of equestrian enterprises, such as livery yards, racing stables and riding schools.
Aminopyralid is the active ingredient in herbicides such as Forefront*, Pharaoh*, and Banish*. These herbicides are among the most effective for controlling and eliminating many deep-rooted perennial weeds found in grassland, including docks, thistles, nettles, and ragwort.
Ragwort control is especially important, as it can be deadly if eaten by horses.
When grassland is sprayed with aminopyralid, it kills the target weeds but does not affect the grass. However, when this grass is eaten by horses, either out in the field or as conserved feed such as hay or haylage, a small amount of aminopyralid may pass out with the resulting manure.
You can test manure for aminopyralid residues (see instructions on right). If you believe you have manure containing aminopyralid, please contact us.
No, but you must follow all labelling and safety literature, including:
Aminopyralid decomposes with the help of micro-organisms found in soil. Residues in manure break down if rotovated into the soil and turned over regularly.
For people with concerns, we recommend the testing method (see Testing Manure in adjacent column).
Do not sell on. Affected manure must not be given or sold on to gardeners or allotment holders as it may affect any sensitive crops that they subsequently grow in the soil it has been incorporated into. Best practice is to ensure that it gets spread on grassland or land destined for grass, cereals or maize.
If in any doubt please contact us by e-mail on DowAgroSciencesUK@dow.com
Link to the following sites for more information about aminopyralid:
Dow AgroSciences Forefront leaflet:http://www.dowagro.com/PublishedLiterature/dh_010e/0901b8038010e4c8.pdf?filepath=/uk/pdfs/noreg/011-01488.pdf&fromPage=GetDoc
Grassland Management, Dow AgroSciences:http://www.dowagro.com/uk/grass_bites/management/success.htm
Department for Environment, Food, and Rural Affairs:http://www.defra.gov.uk/farm/wildlife/weeds/index.htm
* Trademark of Dow AgroSciences LLC