New Herbicide Aims to Extinguish Environmental Wildfire

Dow's Milestone herbicide gives farmers effective option to reverse spread of noxious weeds.

Published on: Nov 28, 2005

Pushed together, the most notorious noxious and invasive plants, like spotted knapweed, Canada thistle, musk thistle, yellow starthistle and tropical soda apple, would cut a swath about 80 miles wide from Los Angeles to New York City. Assuming a modest 10% annual expansion rate under current control and management practices, the band will widen to nearly 130 miles by 2010.

Dow AgroSciences' Milestone herbicide gives farmers, ranchers and land and resource managers an effective option to help reverse the spread of this environmental pollution. Milestone brings a new molecule – aminopyralid – to invasive weed management and offers a better option for increasing forage production on grazing lands and restoring native plant communities and wildlife habitats.

"Aminopyralid is a revolutionary molecule that brings several advances to noxious and invasive weed control," says Bob Gordon, Dow AgroSciences senior marketing specialist. "It provides unparalleled results on some of the toughest-to-manage broadleaf weed species threatening rangeland, pasture and wilderness areas today."

Low-use rates

Milestone is a non-volatile, non 2,4-D formulation that was reviewed and accepted under the EPA's Reduced Risk Pesticide Initiative. Field trials have shown that Milestone offers excellent control at low use rates, so it not only benefits the environment by reducing the threat of invasive weed species, but it does so with fewer pounds of active ingredient compared to current standards. And even at the low labeled-use rate of 4 to 7 ounces per acre, Milestone provides excellent post-emergence control and season-long residual activity on many important invasives, which is critical to preventing re-establishment of the prolific seed producers commonly found among invasive species. Consider tropical soda apple, for example.

"Tropical soda apple has emerged as a major threat to grazing acres throughout Florida, and it's spreading rapidly north," says Bill Kline, Dow AgroSciences product technology specialist. "University of Florida research shows that Milestone provides excellent control of TSA, and it is the only herbicide available in Florida that provides residual control of TSA seedlings."

Milestone translocates quickly throughout the entire plant and deep into extensive root systems for faster, more complete control of tough perennials, such as Canada thistle and knapweeds.

"Canada thistle is a common, stubborn problem throughout much of the United States. Its massive root system, which can sprout new plants and grow up to 20 feet horizontally in one season, makes control very difficult," says Bob Masters, Dow AgroSciences product technology specialist. "Root kill is the key to lasting results. Milestone consistently provides greater than 90% control of Canada thistle, even a year after treatment."

No grazing restrictions

While Milestone herbicide is tough on aggressive invaders such as yellow starthistle and musk thistle, it's safe to desirable grasses. There are no grazing restrictions for any class of livestock, including lactating dairy animals, beef cattle, horses, sheep and goats, and Milestone can be applied by ground or by air. It's an easy formulation to use, as it mixes well with other herbicides and stays in solution.

"Milestone is truly a foundation product. It can be tank-mixed with PastureGard or Remedy herbicide for one-pass brush and broadleaf weed control. We're also evaluating Milestone in other formulations to meet the broad needs of livestock producers and land managers," Gordon says. "We anticipate users will build their land-management programs on this molecule."

For more information about Milestone, visit, contact your Dow AgroSciences sales representative or call the Customer Information Center at 1-800-263-1196.