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Understanding the Science Behind Pigweed’s Amazing Adaptation

Dec 20, 2021
USDA. ARS. Tellus.
Pigweed is a major challenge to our farmers and growers. It is extremely resilient and resistant to many herbicides, posing a significant threat to the agriculture industry. ARS scientists in Stoneville MS, along with collaborators from Clemson University, are researching the pigweed itself to find ways to mitigate this highly adaptable weed.

Vimeo - Stemming the Tide: Garlic Mustard ID & Control

Vimeo; Wisconsin Forest Projects.

Virginia Tech Scientists who Identified Dangerous Giant Hogweed in Clarke County Hopeful That it will be Contained

Jun 18, 2018
Virginia Tech.
Virginia Tech researchers who helped identify the dangerous Giant Hogweed plants in Clarke County, Virginia, want residents to stay on the lookout for the plant with toxic sap that can cause severe burns — but also stressed that the weeds are believed to have been planted intentionally decades ago and haven’t spread in the years since. Anyone who suspects they have found Giant Hogweed should take photos, check online to compare the plant to giant hogweed photos, and then contact a Virginia Cooperative Extension agent.

Washington Scotch Broom Census Set for May

Apr 28, 2020
Washington State Recreation and Conservation Office. Washington Invasive Species Council.
The Washington Invasive Species Council, state agencies and researchers are calling for a census in May to help determine the location of Scotch broom throughout the state. "We need everyone's help to size up the problem," said Justin Bush, executive coordinator of the Washington Invasive Species Council. "Without baseline information about the location and population size, we don’t have enough details to determine solutions. The information from the census will help us set short- and long-term action plans." Yellow flowered, Scotch broom is hard to miss when blooming. It can be found in 30 of Washington's 39 counties [PDF, 282 KB]. While known to be spread across the state, specific locations and patch sizes are not well documented, leading to the council's call for a month-long census.

"We're asking people to send us information from their neighborhoods," Bush said. "The information can be transmitted easily to the council by using the Washington Invasives mobile app or by visiting Report a Sighting. Sightings should include a photograph of the plant that shows enough detail that the plant can be verified by an expert. A description of the size of the patch is also helpful, such as whether the patch is the size of a motorcycle, a car, a school bus or multiple school buses. Photographs also can be shared with the council on Facebook, Instagram and Twitter by using the hashtags #TheGreatScotchBroomCensus and #ScotchBroom2020Census."

Watch for Garlic Mustard Aphids

May 2022
Indiana Native Plant Society.
A European aphid that is only known to eat invasive garlic mustard has recently been found in the Midwest. If you see garlic mustard with curled leaves or aphids, help researchers studying this insect by sending in a report. Because the aphids may help control invasive garlic mustard plants, they are working with citizen scientists to map their distribution.

Weed Alert: First Report of Palmer Amaranth in Connecticut - Watch Out for This Pigweed! [PDF, 552 KB]

2019
Connecticut Agricultural Experiment Station.
In summer 2019, a population of Palmer amaranth was identified in pumpkin fields in East Windsor, Hartford. This is the first report of Palmer amaranth in Connecticut.
See also: All Available Fact Sheets for more resources