QUIZ – This Week in Agronomy

Jay Whetter

Three questions on agronomy issues and messages top of mind this week, including pre-harvest intervals, missing crop and variety trials.

1.

The Pre-Harvest Interval (PHI) is the minimum number of days that must pass between product application and cutting your crop by swathing or straight-cutting. If bertha armyworm has reached threshold on a field, it may help to know that the PHI for deltamethrin products (Decis, etc.) on canola is 7 days while  the PHI for another insecticide option, cypermethrin (UP-cyde or Ship), is ____ day(s)? (Fill in the blank)

2. What caused this damage?  

Quiz August 6
3. August is a good month to visit canola variety trials to check on standability, maturity and disease tolerances for specific cultivars. For 2026, at least two new canola cultivars have enhanced tolerance (but not resistance) to which pest?