By Andi Anderson
Asian copperleaf, a non-native weed species, has been identified for the first time in Illinois. It was discovered in a farm field in Stephenson County after corn harvest, raising concerns among crop experts and farmers.
This weed species is not native to the United States. It was first confirmed in New York in 1990 and later found in Iowa in 2016. Since then, it has spread across several counties in Iowa, making Illinois the third state to report its presence.
Experts warn that early detection is very important. “It is more advantageous to remain in front of a new weed challenge rather than allow it to get in front of researchers and producers,” says Aaron Hager, weed science professor at the University of Illinois.
Asian copperleaf is a summer annual plant that grows from seeds. It can spread quickly and may become a serious threat if not controlled early. Reports from its native regions suggest it may develop resistance to herbicides, which increases concern for farmers.
The plant can be hard to identify in its early stages. It has alternating leaves with serrated edges and pointed tips. Its stems grow upright, and the flowers are small and not easily noticeable. One key feature is the bracts, or leaf-like structures, beneath its flowers.
“These bracts are important for distinguishing Asian copperleaf from native Acalypha species,” experts explain. David Zaya adds, “The best way to tell Asian copperleaf apart is the leafy tissue under the flowers.”
He further explains, “If it looks like a small hand or lopsided star with long ‘fingers,’ it is one of the native species. If it looks like a heart or egg with a pointed tip, it is probably Asian copperleaf.”
Farmers are advised to scout fields before planting and during the growing season. Preventing seed spread is essential. Fields with this weed should be harvested last, and equipment should be cleaned before moving to other fields.
Early awareness and careful management can help reduce the spread and protect crops from this growing threat.
Photo Credit: gettyimages-zoomtravels
Categories: Illinois, Rural Lifestyle, Farm Safety