Polaris AC

Common Name: Imazapyr—53.1%

Formulation: Water-soluble liquid (amine salt)

Signal Word: Caution

Toxicity: Practically nontoxic; oral LD50: >5,000 mg/kg

Use Classification: General Use

Minimum Required Personal Protective Equipment: Long-sleeved shirt, long pants, shoes, and socks

Carriers: Water

Activity: Absorbed through foliage, cut surfaces, and roots

Mode of Action: Accumulates in plant meristems (growth regions); inhibits the synthesis of an enzyme responsible for producing certain amino acids only found in plants

Selectivity: Conifers generally resistant

Precautions: Do not apply to areas where roots of sensitive desirable plants may extend.  Do not apply directly to water

Application Methods: Foliar spray, cut stump, stem injection, frill girdle

Uses: For post-emergence and residual control of many grasses, broadleaf weeds, vines, and woody vegetation for site preparation and release of conifers; also used for stump and cut stem treatment to control woody vegetation.  Permissible to treat seasonally dry wetlands.