Herbicide Resistance in MN and ND

1. Gly-R common ragweed Gly-R giant ragweed Gly-R waterhemp Black symbols: confirmed resistant cases; Blue: highly suspected Provided by: Drs. Jeff Stachler and Mike Christoffers Areas and counties of ND and MN having known and suspected glyphosate-resistant weeds 2006

2. Gly-R common ragweed Gly-R giant ragweed Gly-R waterhemp Black symbols: confirmed resistant cases; Blue: highly suspected Provided by: Drs. Jeff Stachler and Mike Christoffers Areas and counties of ND and MN having known and suspected glyphosate-resistant weeds 2007

3. Gly-R common ragweed Gly-R giant ragweed Gly-R waterhemp < 5% soybean fields gly-R C. Rag. 40 to 75% all acres have gly-R G. Rag. & 20 to 40% all acres have gly-R waterhemp 15 to 40% all acres gly-R C. Rag. Black symbols: confirmed resistant cases; Blue: highly suspected 5 to 20% all acres gly-R waterhemp Provided by: Drs. Jeff Stachler and Mike Christoffers Areas and counties of ND and MN having known and suspected glyphosate-resistant weeds 2008

4. Gly-R common ragweed Gly-R giant ragweed Gly-R waterhemp 25 to 40% soybean fields gly-R C. Rag. 30 to 95% all acres have gly-R G. Rag. 30 to 60% all acres gly-R C. Rag. Black symbols: confirmed resistant cases; Blue: highly suspected 5 to 20% all acres gly-R waterhemp 10 to 30% soybean fields gly-R C. Rag. Provided by: Drs. Jeff Stachler and Mike Christoffers Areas and counties of ND and MN having known and suspected glyphosate-resistant weeds 2009

5. Gly-R common ragweed Gly-R giant ragweed Gly-R waterhemp 25 to 40% soybean fields gly-R C. Rag. 50 to 95% all acres have gly-R G. Rag. 30 to 60% all acres gly-R C. Rag. Black symbols: confirmed resistant cases; Blue: highly suspected 5 to 80% all acres gly-R waterhemp 10 to 40% soybean fields gly-R C. Rag. Provided by: Drs. Jeff Stachler and Mike Christoffers Areas and counties of ND and MN having known and suspected glyphosate-resistant weeds 30 to 90% all acres have gly-R waterhemp 2010

6. Waterhemp in RR soybean near Holloway, MN - 2010

7. Giant ragweed in RR soybean in Renville, Co., MN - 2010

8. Gly-R horseweed Gly-R kochia Gly-R common ragweed Gly-R giant ragweed Gly-R waterhemp 5 to 50% soybean fields gly-R C. Rag. 60 to 95% all acres have gly-R G. Rag. 30 to 60% all acres gly-R C. Rag. Black symbols: confirmed resistant cases; Blue: highly suspected 5 to 95% all acres gly-R waterhemp Provided by: Drs. Jeff Stachler and Mike Christoffers Areas and counties of ND and MN having known and suspected glyphosate-resistant weeds 70 to 95% all acres have gly-R waterhemp 2011 70 to 95% all acres gly-R C. Rag. 5 to 70% all acres gly-R G. Rag. & waterhemp

9. Near Princeburg, MN - 2011

10. On Hwy 12 between Willmar and Benson, MN - 2011

11. Galchutt, ND - 2011

12. Galchutt, ND - 2011

13. Moorhead, MN - 2011

14. SE of Shelly, MN - 2011

15. E. of Nielsville, MN - 2011

16. SW Traill Co., ND - 2011

17. Observations from ND and Manitoba fields Herbicide Resistance:

18. Observations from ND and Manitoba fields Herbicide Resistance:

19. Susceptible Wild Oat (Avena fatua) Endangered in Manitoba (Beckie et al. 2010)

20. Susceptible Wild Oat (Avena fatua) Endangered in Manitoba (Beckie et al. 2010)

21. Susceptible Wild Oat (Avena fatua) Endangered in Manitoba (Beckie et al. 2010)

22. Susceptible Wild Oat (Avena fatua) Endangered in Manitoba (Beckie et al. 2010)

23. Untreated Everest Puma Axial Select Assure II TG Sample A 4 weeks after treatment Seed collected in 2009

24. Untreated Everest Puma Axial Select Assure II TG Sample B 4 weeks after treatment Seed collected in 2009

25. Untreated Everest Puma Axial Select Assure II RS 4 weeks after treatment Seed collected in 2009

26. Untreated Everest Puma Axial Select Assure II JC 4 weeks after treatment Seed collected in 2009

27. 3 weeks after treatment Untreated Axial Goldsky Select Puma Susceptible Wild oat

28. 3 weeks after treatment Untreated Axial Goldsky Select Puma KDJ U Wild oat

29. Field perimeter management (2010)

30. Ramifications of not managing field perimeter (2011)