What is in this article?:
- Peanut diseases surge in areas of excessive rainfall
- Stem rot off to fast start
- Alto registered in peanuts
With some areas of Alabama receiving as much as 10 to 30 inches of rainfall in a short period of time, controlling diseases in peanuts is becoming a major concern for producers.
Stem rot off to fast start
Stem rot, or white mold, has also gotten off to a fast start in peanuts. It’s much more of a problem in the traditional peanut production area in southeast Alabama but is showing up in field trials at the Gulf Coast Research and Extension Center in Fairhope. I
Incidence of stem rot is typically much higher the more frequently peanuts are cropped in individual fields but there are a few fields that historically have high levels of this disease regardless of cropping history.
Most widely planted runner peanut varieties, except maybe Florida 07 and Georgia-07W, are fairly susceptible to stem rot. Convoy at rates from 20 to 32 fluid ounces per acre tends to have a slight edge in performance in high stem rot pressure situations. Otherwise, Fontelis, Provost, Abound alone or tank mixed with Alto, and Priaxor when applied at recommended rates for stem rot control also are effective against this disease.
Headline has good stem rot activity but must be applied at night when the leaves are folded to get best results. Other strobilurin fungicides like Abound would also benefit from night applications. The generic tebuconazole fungicides as well as Evito, Evito T, Topguard and Quash also have stem rot activity and would be more suitable in lower pressure situations.
While thrips damage levels were high in a lot of peanut fields, TSWV pressure is fairly low and the disease is unlikely to cause any yield losses.