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YELLOW BURR-WEED is widely established in the Wimmera and Mallee districts in Victoria, presumably introduced with fodder brought to this country from the United States about 1914.
It is a problem in Oregon and other north west wheat areas of America.
The weed is also widespread in New South Wales, being most troublesome in the wheat-growing sections of the Riverina. It is not established to the same extent in South Australia and Queensland.
The recent discovery of areas infested with yellow burr-weed at Merredin prompted the Agriculture Protection Board to declare it a primary noxious weed for Western Australia.
Meadly, G R W
"Amsinckia or yellow burr-weed (Amsinckia spp.),"
Journal of the Department of Agriculture, Western Australia, Series 4: Vol. 9
, Article 5.
Available at: https://researchlibrary.agric.wa.gov.au/journal_agriculture4/vol9/iss5/5