SimpleJoe - 12/16/2025 10:54

I agree no group 15 pre should be considered usable as a large seeded broadleaf product. PPO group should be considered light as well, especially applied several weeks ahead of normal ragweed germination timeframe.

Here's the pre we are looking at as of today. Still trying to work through pricing to see what else may exist. This would be sprayed on notill here usually between April 10 and April 25th ahead of the planters.
Annihilate (private label Authority Supreme) 7.5 oz
Resist (Private label Canopy DF) 2 oz
Tricor (generic Metribuzin) 8 oz
24D LV6 12 oz
This gives us a total of about 4 oz of Sulfentrazone, 3.7 oz of Zidua, .85 oz of Classic, and a total of 10 oz of Metribuzin. I tell everyone there will be no ragweed control with this. We usually use Resist on every acre(it's great at messing up the volunteer corn and it's cheap) and have done piles of Pursuit pre (Zidua Pro @ 6 oz, Thunder @ 4 oz) and it does not control ragweeds either. Max total Classic for us is 1 oz annual or we will see carryover in the corn where overlaps occurred. We tried a little Flexstar, tried using it dual purpose to aid in burndown but cool and cloudy April days make it not effective for that purpose. That sends the focus to First Rate. Which is probably the best shot we have in our application window. Problem is you need the .76 oz per acre rate to achieve maximum labeled control. Sonic/Authority First to get to .76 first rate is 9 oz per acre, you are at basically 10 oz of Sulfentrazone at that rate. Now you pickup the increased risk of PPO damage on young beans. Sonic used at anything below 9 oz your are effectively reducing the strength and/or residual control window. In the 90's, First Rate in crop use rate was .38 oz and we would not consider it at that rate to have any measurable residual. So Sonic at 4.5 oz would not last very long as a LSB pre here against ragweed.