Canola Watch quiz – This week in agronomy Jay Whetter June 5, 2019 Leave a Comment The following questions are inspired by conversations with Canola Council of Canada agronomy specialists this week. 1. What happened to this seedling? CrustingHerbicide carryoverSeed-placed fertilizer damageSeedling diseaseShortage of moistureAny one of these is possible 2. What is turgor pressure?The tipping point where insect feeding exceeds plant growth.A plant's ability to speed up ground cover when faced with heavy weed competition.Political uprisings in Eastern Europe.Water pressure inside plant cells that allow hypocotyls to push through soil. 3. What is the reason for these missing plants? CutwormsHerbicide carryoverLow soil moistureSeeder malfunction 4. Why do you need to know the thresholds when scouting for insects?If you don't look for the thresholds, you might trip when entering the field.If you don’t know the thresholds, you may be tempted to spray when you see just a few insects feeding on your crop.Scouting doesn't matter. Just go with the thresholds.Thresholds tell you when all hope for a crop recovery is lost. 5. Flea beetles' favourite weather conditions are:Cool and moistDry and windyWarm and moistWarm and dry 6. Wondering about reseeding in early to mid June? If the stand has at least ___ plants per square foot and plant population is relatively uniform across the field, it may be better to leave it...as long as you can protect the remaining plants.2345 7. Glufosinate and its surfactant can be very good at removing residual (and canola-damaging) herbicides that can be bound to sprayer tanks and plumbing. If a sprayer tank is left full of glufosinate for any extended period of time, the risk of tank contamination and canola crop damage increases. It helps to know the specific tank-cleanout methods required for each product. Since we're on the topic of glufosinate, which method is recommended for that product?Method A: Drain contents of tank – 1 to 2X Water Rinse – 2X Ammonia Rinse – 2X Water Rinse (one just prior to the next spraying event)Method B: Drain contents of tank – 2X Water Rinse – 2X Detergent Rinse – 2X Water RinseMethod C: Drain contents of tank – Several repetitions of the Water Rinse with nozzles and screens removed and checked for debris Loading...
