Aminocyclopyrachlor is a selective, low-

toxicity Toxicity is the degree to which a chemical substance or a particular mixture of substances can damage an organism. Toxicity can refer to the effect on a whole organism, such as an animal, bacterium, or plant, as well as the effect on a subs ...

herbicide that provides pre- and post-emergent control of

broadleaf weed Broadleaf weeds are unwanted tough plants that may grow in lawns, gardens or yards. They can be easy to spot when growing among grasses. They multiply with ease and can be very hard to eradicate. Basic characteristics Dicotyledon, Broadleaf Weed, w ...

s, woody species,

vine A vine (Latin ''vīnea'' "grapevine", "vineyard", from ''vīnum'' "wine") is any plant with a growth habit of trailing or scandent (that is, climbing) stems, lianas or runners. The word ''vine'' can also refer to such stems or runners themsel ...

s and

grass Poaceae () or Gramineae () is a large and nearly ubiquitous family of monocotyledonous flowering plants commonly known as grasses. It includes the cereal grasses, bamboos and the grasses of natural grassland and species cultivated in lawns a ...

es on several non-food use sites, such as

rights of way Right of way is the legal right, established by grant from a landowner or long usage (i.e. by prescription), to pass along a specific route through property belonging to another. A similar ''right of access'' also exists on land held by a gov ...

wildlife management area A Wildlife Management Area (WMA) is a protected area set aside for the conservation of wildlife and for recreational activities involving wildlife. New Zealand There are 11 Wildlife Management Areas in New Zealand: * Horsham Downs Wildlife Man ...

s, recreational areas,

turf Sod, also known as turf, is the upper layer of soil with the grass growing on it that is often harvested into rolls. In Australian and British English, sod is more commonly known as ''turf'', and the word "sod" is limited mainly to agricult ...

lawn A lawn is an area of soil-covered land planted with grasses and other durable plants such as clover which are maintained at a short height with a lawnmower (or sometimes grazing animals) and used for aesthetic and recreational purposes. ...

golf course A golf course is the grounds on which the sport of golf is played. It consists of a series of holes, each consisting of a tee box, a fairway, the rough and other hazards, and a green with a cylindrical hole in the ground, known as a "cup". ...

s and

sod Sod, also known as turf, is the upper layer of soil with the grass growing on it that is often harvested into rolls. In Australian and British English, sod is more commonly known as ''turf'', and the word "sod" is limited mainly to agricult ...

farms. It was conditionally registered as

Imprelis Imprelis is a selective herbicide created by DuPont. The active ingredient is aminocyclopyrachlor, a synthetic auxin. Description Imprelis is a selective herbicide created by DuPont. The active ingredient is aminocyclopyrachlor, a synthetic ...

by DuPont in August 2010, and first used in Fall 2010. The chemical is a systemic herbicide and acts by disrupting gene expression. This causes undifferentiated cell division and elongation. Due to the possibility of damage to specific conifer species, the

United States Environmental Protection Agency The Environmental Protection Agency (EPA) is an independent executive agency of the United States federal government tasked with environmental protection matters. President Richard Nixon proposed the establishment of EPA on July 9, 1970; it ...

and DuPont advised professional applicators and residential consumers to not use Imprelis where Norway spruce or white pine trees are present on or near the property being treated.United States EPA
/ref> The impacts of aminocyclopyrachlor on garden plants, when found as a residue in mulch is commonly reported. It is a highly toxic Persistent Herbicide that will kill a tomato plant at a concentration of one part per billion, and impact many other garden plants also. And is often used as a herbicide for hay and straw producers, which makes it increasingly likely that horse manure and bedding will be contaminated with it. Persistent herbicides are a narrow range of herbicides used to kill broad leaf weeds and thistle that compete with grasses and grain crops. They are "persistent" because they will not decompose under the high temperatures in thermophilic composting and may take over 2 years or more to fully decay. There are 4 persistent herbicides: Picloram - Sold as Graslan™, Grazon®, Surmount®, and Tordon® Clopyralid - Sold as Stinger® Aminopyralid - Sold as Capstone™, Chaparral™, CleanWave®, Forefront®, GrazonNext®, Milestone®, Opensight®, PasturAll®, and Sendero.™ Aminocyclopyrachlor - Sold as Imprelis® These herbicides are extremely potent, with maximum application rates of only 7-12 liquid ounces....per acre.......per year.

References

{{herbicides Herbicides Pyrimidines Carboxylic acids Chloroarenes Cyclopropanes Auxinic herbicides