You have been advised to come to this website to learn about a Dow AgroSciences herbicide product containing aminopyralid that has been applied to land that you manage. There are certain use precautions and restrictions of which you should be aware, so please review the information below.
Dow AgroSciences is committed to responsible stewardship of its products throughout their lifecycle. Thank you for your partnership in the responsible use of aminopyralid products! If you have further questions concerning aminopyralid use, restrictions or products, please contact us.
Key Aminopyralid Facts
- Aminopyralid is an excellent selective, systemic herbicide with postemergence and preemergence activity on many noxious and invasive broadleaf weeds that reduce grass forage production and threaten native grassland and rangeland ecosystems.
- Aminopyralid does not have adverse effects on livestock consuming treated forage.
- Aminopyralid does not degrade in plants and takes 3 days to pass through a grazing animal’s digestive system once treated forage is ingested.
- Manure may contain enough aminopyralid to cause injury to broadleaf plants including vegetables and ornamentals.
- Aminopyralid is broken down by soil microbes.
- Forage growers must read and understand aminopyralid use precautions and restrictions.
- Forage growers should inform the recipient of hay or manure from animals grazing pastures or feeding on grass or hay from areas treated with aminopyralid of the label precautions and restrictions before applying the herbicide.
- Aminopyralid restrictions include a prohibition on use of hay intended for export outside the United States.
Dow AgroSciences Aminopyralid Products
Your applicator has selected one of these products to best meet your vegetation management needs.
Aminopyralid Use Precautions and Restrictions
- Grasses grown for hay must not be exported outside the United States.
- Manure and urine from animals consuming grass or hay treated with this product may contain enough aminopyralid to cause injury to sensitive broadleaf plants.
- Do not use hay or straw from areas treated with aminopyralid or manure from animals feeding on hay treated with aminopyralid in compost.
Grazing and Haying Restrictions on Aminopyralid-treated Grass
- Do not transfer grazing animals from areas treated with the product to areas where sensitive broadleaf crops occur without first allowing 3 days of grazing on an untreated pasture. Otherwise, urine and manure may contain enough aminopyralid to cause injury to sensitive broadleaf plants.
- Do not use treated plant residues, including hay or straw from treated areas, or manure from animals that have grazed forage or eaten hay harvested from treated areas within the previous 3 days, in compost, or mulch or mushroom spawn that will be applied to areas where commercially grown mushrooms or susceptible broadleaf plants may be grown.
- Do not spread manure from animals that have grazed or consumed forage or eaten hay from treated areas within the previous 3 days on land used for growing susceptible broadleaf crops.
- Manure from animals that have grazed forage or eaten hay harvested from treated areas within the previous 3 days may only be used on pasture grasses, grass grown for seed, and wheat and corn.
- Do not plant a broadleaf crop (including soybeans, sunflower, tobacco, vegetables, field beans, peanuts and potatoes) in fields treated with manure from animals that have grazed forage or eaten hay harvested from aminopyralid-treated areas until an adequately sensitive field bioassay is conducted to determine that the aminopyralid concentration in the soil is at level that is not injurious to the crop to be planted.
- Do not plant a broadleaf crop in fields treated in the previous year with manure from animals that have grazed forage or eaten hay harvested from treated areas until an adequately sensitive field bioassay is conducted to determine that the aminopyralid concentration in the soil is at level that is not injurious to the crop to be planted.
- To promote herbicide decomposition, plant residues should be evenly incorporated in the surface soil or burned. Breakdown of aminopyralid in plant residues or manure is more rapid under warm, moist soil conditions and may be enhanced by supplemental irrigation.
- Do not rotate to any crop from rangeland, permanent pasture or CRP acres within one year following treatment. Cereals and corn can be planted one year after treatment. Most broadleaf crops are more sensitive, and can require at least 2 years depending on the crop and environmental conditions. Do not plant a broadleaf crop until an adequately sensitive field bioassay shows that the level of aminopyralid or metsulfuron present in the soil will not adversely affect that broadleaf crop.
Printable PDF (92KB) of Use Precautions and Grazing and Haying Restrictions
Informing Buyers about Hay from Aminopyralid-treated Fields
If you intend to sell or distribute hay grown in the field treated with an aminopyralid product you must inform the recipient of the hay about the use precautions and restrictions.
This form is an example (not a legally binding document) of how to inform the hay recipient about hay, manure and compost use restrictions on hay grown in a field treated with an aminopyralid product.