Skip to comments.Invasive Weeds Can Cause Blisters, Blindness
Posted on 07/25/2002 12:08:07 PM PDT by blam
Date: Posted 7/25/2002
Invasive Weed Can Cause Blisters, Blindness
AMHERST, Mass. Gardeners, landscapers, farmers, hikers and others who spend time outdoors are being urged by the state agriculture department and the University of Massachusetts Amherst to watch out for an invasive, noxious weed that has been found in Massachusetts. The giant hogweed, a native plant of the Caucasus region of central Asia and found in the western Massachusetts town of Granville last week, can grow to 15 feet tall. The sap can cause severe skin irritation, blisters and swelling and contact with the eyes can cause temporary or permanent blindness. Photos and more information on the giant hogweed are available on the Massachusetts Department of Food and Agriculture's Web site at www.mass.gov/dfa/pestalert. Anyone who believes they have found a giant hogweed plant should contact the Department's Pesticide Bureau at 617/626-1771 for guidance on how to kill and dispose of the plant.
The giant hogweed was introduced into the United States as an ornamental plant and has become established in New York, Pennsylvania, and Washington state. Infestations have also been reported in Maine, Michigan and Washington D.C., according to the U.S. Department of Agriculture's Animal and Plant Health Inspection Service. State agriculture inspector Alfred Carl found the weed on a routine inspection in Granville.
"This plant is bad news," says Craig Hollingsworth of University of Massachusetts Extension. Hollingsworth coordinates the state's Cooperative Agricultural Pest Survey. "We have been on the lookout for giant hogweed for a couple of years. It has big seeds and is spread by birds, but the main culprits are gardeners."
Hollingsworth says that the plant can be spectacular, growing up to 15 feet tall with four-inch stems that have purple splotches and leaves five feet across at its base. It has large umbrella-shaped flowers. He says that the plant has been irresistible to some gardeners who have imported it to grow in their gardens.
A similar related species, cow parsnip, is often mistaken for giant hogweed. Cow parsnip differs in that it reaches a maximum height of six feet and has no purple on its stems. Giant hogweed seeds are used in a Middle Eastern spice called golpar.
Brad Mitchell, Director of Regulatory Services for the state Department of Food and Agriculture, says that it is important to remove giant hogweed wherever it is found. "We're concerned about the potential consequences if this plant becomes as common as other introduced weed pests such as Japanese bamboo or purple loosestrife."
Once established, giant hogweed is difficult to control without chemicals, according to Mitchell. Cutting off flower heads will prevent this season's seeds from forming, but the root can send up new shoots every year and the roots can spread.
Editor's Note: The original news release can be found at http://www.umass.edu/newsoffice/archive/2002/072402weed.html
Invasive Weeds Can Cause Blisters, Blindness
Nicknamed the masturbation weed.
(more) Giant Hogweed
Wild cow parsnip is all OVER Alaska. It looks like this:
It has CAUSTIC juice. It can be eaten if picked early enough, but non-Natives don't usually look at it as a food. My son tried to eat it raw when he was a tyke, and got 2nd degree burns all around his mouth, in his mouth, down his belly. He still has scars. As far as I know, the plant is not TOXIC, but it is caustic. Beware.
Just a dumb question, but why is our customs office allowing the importation of this, and numerous other plants, that are highly invasive? Until proven non-harmful to our US environment, plants should be denied entry. Must be the same folks who let all the Muslim terrorists into the country.
Yellow Star Thistle
Public Plant Enemy #1
The Yellow Star Thistle has infested over 8 million acres in California and threatens every Western state. The Verde watershed is especially vulnerable to this noxious weed and property owners need totake aggressive action to eradicate this dangerous pest before it is too late.
Once established, giant hogweed is difficult to control without chemicals
You know, I seem to remember being told by my grandmother that something else causes those same symptoms...
I've heard everything from fire to vinegar. The fact is that most pest infestations are complex and dynamic enough to require custom treatment plans. There is no substitute for being trained and equipped for multiple methods, and there is no substitute for intimate familiarity with the land.
Tordon would get rid of it in a heartbeat. We used it when I did line clearance for the utility companies years ago and it is still on the market. You probably need some kind of special license to buy it though. It would probably get rid of that Hogweed pretty easily too. Here is a link on herbicides.