Unparalleled Versatility and Ease of Use!

WHETSTONETM provides versatile season-long control of selective annual, perennial and biennial broadleaf weeds in right-of-ways and bare ground areas. Coverage includes invasive and noxious weeds, and certain woody plants and vines.  Its active ingredient, aminopyralid, is well-known for being gentle on nutritional grasses while selectively eliminating invasive thistles, legumes, and other broadleaf weeds.



Though not classified as a hazardous substance or mixture and the product has no grazing restrictions as such, applicators and end-users should know that waste produced from animals consuming grasses or hay treated with animopyralid may retain enough active ingredients to harm sensitive broadleaf plants. Applicators and end-users should carefully follow product labels regarding warning s or restrictions for manure use.


Do not apply directly to water. Take care to minimize the incidental overspray along the shoreline when applying to terrestrial plants at the water’s edge or to water in areas where surface water is present. Do not apply directly to intertidal areas below the mean high water mark. Do not contaminate water when disposing of equipment washwater or rinsate.

This chemical has properties and characteristics associated with chemicals detected in groundwater. The use of this chemical in areas where soils are permeable, particularly where the water table is shallow, may result in groundwater contamination. Application around a cistern or well may result in contamination or drinking water or groundwater.


(2 x 2.5 gal) per case/ 180 gals per pallet
(6 x 1 qt) per case/480 qts per pallet

States Registered – AL, AK, AR, AZ, CA, CO, CT, DE, FL, GA, HI, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY*, OH, OK, OR, PA, PR, RI, SC, SD, TN, TX, UT, VT, VA, WA, WI, WV, WY


It is a violation of Federal law to use this product in a manner inconsistent with its labeling.

Read all Directions for Use carefully before applying.

This product is not intended for reformulation or repackaging into other end-use products.

Do not apply this product in a way that will contact workers or other persons, either directly or through drift. Only protected handlers may be in the area during application. For any requirements specific to your State or Tribe, consult the agency responsible for pesticide regulation.


For additional information on this product please reference the Material Safety Data Sheet and Product Label listed below.

Contact Us

Please send us a message and we'll get back to you as soon as possible.

Not readable? Change text. captcha txt

Start typing and press Enter to search