 So do the broadleaf herbicides Resource and Cadet. Ultra Blazer has a 50-day pre-harvest interval, and Cobra is labeled until within 45 days of harvest. All these broadleaf herbicides are PPOs, Cobra, Ultra Blazer, Cadet, and Resource. Yes, they'll give you some leaf burn, but if you can get control or even suppression on late-season broadleaves and soybeans, it can really make a difference for both yield and future weed issues if you keep weeds from going to seed. That's today's Ag PhD Radio Update. I'm Darren Hefty. Music