It’s still raining.
Corn: Southern Rust has moved across the Florida line into Georiga. It was found today in Grady and Clinch counties, so it is on the move. If you have sprayed your corn with a mixed mode of action fungicide, you should get around 3 weeks of control. We are trying to hit the hard-dough stage, and that is when we are clear of any harm from Southern Rust. The hard dough stage is about 30-35 days after silking. We have several great fungicides, but I would recommend one that has 2 modes of action.
Peanuts: Weed control and Disease control are our two biggest problems now. When you can go, I’d be looking at Select+COC, then 3 days later, I would apply Cadre+Cobra+24DB+Dual Magnum or Warrant or Zidua; add a NIS if you choose Warrant or Zidua. This is a generic recipe for peanut weed control but should cover most of what we should be seeing, but we can tailor it to your specific weeds/needs. Typically on herbicides, rain fastness is anywhere from 1-5 hours, depending on which herbicides you use. Also, I wouldn’t count on residuals much with all of this rain, so I would try and get a residual out when you’re able. Disease-wise, the heavy rain, and cooler soils could slow the onset of white mold, but it increases our chances of leaf spot. Right now, if I’m just starting my fungicide program ( 30ish days), I would not put Bravo out by itself. I think it needs a partner, such as Alto, Teb, or Domark. If I’m closer to the 45-day mark, I’m looking more toward something a little stronger with dual MOAs, products like Lucento, Priaxor, or Approach Prima. There is increased interest in adding sulfur to fungicide programs for the management of leaf spot. Some sulfur formulations (generally at a rates of 3-5 lb/A) (Microthiol Disperss, Microthiol 80W, Drexel Sulfur 80W, Drexel Suffa 6F, TechnoS 90W, and Accoidal 80 WG) have significantly improved the control of leaf spot when tank-mixed with products azoxystrobin (Abound), Headline, Umbra, EXCALIA, and tebuconazole.