Canola Watch quiz – Weed management Jay Whetter May 8, 2019 Leave a Comment Test your weed management knowledge with these eight questions. 1. In 2013, AAFC data analyst Elwin Smith evaluated recent field studies to see which inputs were the most important for canola net returns. Of the following four inputs, which did Smith conclude was essential to provide a positive net return from a canola crop? Applied nitrogenFull recommended seeding rateHerbicideHybrid seed 2. Applying pre-seed herbicide two weeks before seeding is a waste of time and money. TrueFalse 3. Early weed control with lower efficacy is generally preferable to no control at all or late control with higher efficacy. However, biological activity – or “active growth” – is required for herbicide activity. How do you know a weed is actively growing?This is not always easy or quick to determineFlag a weed and take its picture. Come back in a few days to see if it’s biggerLook for bright green colour in the newest growth Frost free nights and day time highs of 10°C or more will support active growth in most weeds All of the above 4. Weeds stressed by frost are more susceptible to herbicide.TrueFalse 5. Glyphosate should be tank mixed with an appropriate tank mix partner when targeting kochia in the pre-seed window.TrueFalse 6. What is this weed? (Click to enlarge) Barnyard grassFoxtail barleyQuackgrassWild millet 7. Which of the following is not an integrated weed management method? Seed earlyMaintain a competitive crop plant standSpray early when weeds are smallSpray when weeds are weak 8. Is this weed an annual or perennial? (Click to enlarge) AnnualPerennial Loading...
