Test your herbicide mode of action knowledge with this short quiz. The questions were written by a team of university extension weed scientists from 14 universities and the USDA Agricultural Research Service. This quiz is part of a national project on herbicide resistant weed management. All responses are kept anonymous, and the correct answers will be revealed after you hit "Submit." Find more information on herbicide resistant weed management at www.integratedweedmanagement.org

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* 1. My principal occupation is:

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* 2. My experience in crop agriculture covers:

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* 3. How many modes of action are in the following herbicide program: Lexar EZ (groups 5 + 15 + 27) followed by Halex GT (groups 9 + 15 +27)?

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* 4. If you apply Enlist Duo (glyphosate + 2,4-D) to a field of Enlist soybeans that contains glyphosate resistant waterhemp, how many modes of action do you have that are effective on the waterhemp?

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* 5. Out of the following, which scenario is MOST likely to lead to the development of herbicide resistance in a weed?

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* 6. What was the last decade in which a new herbicide mode of action for agronomic crops was introduced into the market?

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* 7. How likely is it that a company will release a new herbicide mode of action in the next 10 years that effectively replaces Glyphosate?

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* 8. Which of the following will have the LEAST risk for herbicide resistance evolution as a post-emergence option?

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* 9. Since Liberty herbicide is mode of action Group 10, and Gramoxone is Group 22, Gramoxone is less likely to develop resistance since it has a high number - true or false?

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* 10. Out of the following, which scenario is MOST likely to lead to the development of herbicide resistance in a weed?

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