Please do not spray dicamba late. I don’t care if you are using safened dicamba in corn or XtendiMax or Engenia in soybeans. When dicamba is sprayed late, the volatility issues are far more likely to cup soybean leaves than when dicamba is sprayed early in the season.
The first year that dicamba soybean applications led to leaf cupping on millions of acres in the U.S., I was racking my brain trying to figure out why we were seeing so many issues. You see, when I was a young agronomist more than 30 years ago, nearly every farmer I knew used Banvel, and I saw almost zero soybean leaf cupping.
The big difference between then and now, in my opinion, is the timing. Back then, most people tried to spray between spike and V2. After V2, unsafened dicamba is far more likely to hurt corn, but early spraying doesn’t seem to do much damage to yield. Anyway, in my area this spraying would typically occur in mid to late May.
If all dicamba applications were done by June 1, at least in my region, would we see any leaf cupping on soybeans? If we did, it would probably be very, very minor. The only way I know to stop the movement of dicamba is to not spray it. If you can wrap up your spraying extra early, that would be great. The question is what to spray later on instead of dicamba. Here are some options.