Herbicide Resistant Weeds

HERBICIDE RESISTANT REDROOT PIGWEED GLOBALLY Amaranthus retroflexus
#	Country Click for details	Year	Sites	Acres	Mode of Action
1.	Bulgaria	1984	11-50	1001-10000	Photosystem II inhibitors (C1/5)
2.	Bulgaria	1984	2-5	1-5	Ureas and amides (C2/7)
3.	Canada (Ontario)	1980	501-1000	501-1000	Photosystem II inhibitors (C1/5)
4.	Canada (Ontario)	1998	6-10	501-1000	ALS inhibitors (B/2)
5.	Canada (Ontario)	2001	1	unknown	Ureas and amides (C2/7)
6.	Canada (Quebec)	2001	1	unknown	Ureas and amides (C2/7)
7.	Canada (Manitoba)	2002	1	51-100	ALS inhibitors (B/2)
8.	Canada (Ontario)	2005	1	51-100	Nitriles and others (C3/6)
9.	China	1990	501-1000	101-500	Photosystem II inhibitors (C1/5)
10.	Czech Republic	1985	501-1000	1001-10000	Photosystem II inhibitors (C1/5)
11.	France	1980	unknown	unknown	Photosystem II inhibitors (C1/5)
12.	Germany Multiple Resistance	1980	51-100	51-100	Photosystem II inhibitors (C1/5) Ureas and amides (C2/7)
13.	Greece	2000	2-5	11-50	Photosystem II inhibitors (C1/5)
14.	Israel	1991	2-5	11-50	ALS inhibitors (B/2)
15.	Italy	1999	1	51-100	Photosystem II inhibitors (C1/5)
16.	Italy	2003	1	51-100	ALS inhibitors (B/2)
17.	Poland	1991	51-100	unknown	Photosystem II inhibitors (C1/5)
18.	Spain	1986	6-10	unknown	Photosystem II inhibitors (C1/5)
19.	Switzerland	1982	51-100	101-500	Photosystem II inhibitors (C1/5)
20.	USA (Indiana)	1980	501-1000	1001-10000	Photosystem II inhibitors (C1/5)
21.	USA (Colorado)	1982	501-1000	1001-10000	Photosystem II inhibitors (C1/5)
22.	USA (Connecticut)	1984	501-1000	10001-100000	Photosystem II inhibitors (C1/5)
23.	USA (New Hampshire)	1984	11-50	501-1000	Photosystem II inhibitors (C1/5)
24.	USA (Maine)	1985	51-100	1001-10000	Photosystem II inhibitors (C1/5)
25.	USA (Minnesota)	1991	1	11-50	Photosystem II inhibitors (C1/5)
26.	USA (Vermont)	1991	51-100	1001-10000	Photosystem II inhibitors (C1/5)
27.	USA (Virginia)	1993	unknown	unknown	Photosystem II inhibitors (C1/5)
28.	USA (Oregon)	1994	6-10	101-500	Photosystem II inhibitors (C1/5)
29.	USA (Arkansas)	1995	unknown	unknown	ALS inhibitors (B/2)
30.	USA (Kansas)	1995	unknown	unknown	Photosystem II inhibitors (C1/5)
31.	USA (Maryland)	1998	unknown	unknown	ALS inhibitors (B/2)
32.	USA (Pennsylvania) Multiple Resistance	1998	2-5	501-1000	ALS inhibitors (B/2) Photosystem II inhibitors (C1/5)
33.	USA (North Dakota)	1999	1	1-5	ALS inhibitors (B/2)
34.	USA (Michigan) Multiple Resistance	2001	6-10	51-100	Photosystem II inhibitors (C1/5) Ureas and amides (C2/7)
35.	USA (Idaho)	2005	2-5	501-1000	Photosystem II inhibitors (C1/5)
36.	Yugoslavia	1999	unknown	unknown	Photosystem II inhibitors (C1/5)
37.	Yugoslavia	2002	unknown	unknown	ALS inhibitors (B/2)