Peanut Pointers

  

JOHN BEASLEY
University of Georgia
Extension Peanut Agronomist

Southeast growers are anxious to plant one or more of the recently released runner-type cultivars. Since 2006, there have been 10 cultivars released by the University of Georgia, University of Florida, USDA-ARS and Golden Peanut Co. Several years are needed for the seed supply of newly released cultivars to reach a quantity sufficient for planting on widespread acreage. The following cultivars will be limited in seed supply in 2008: Georgia-06G, Georgia Greener, Florida-07, McCloud, York, AT 3085RO, Tifguard, Georgia-07W, AP-4 and AT 215. The majority, if not most, of these cultivars will be planted for seed increase in 2008. If a grower is asked to plant one of these new releases, I would encourage them to do so. The best way to determine if a new cultivar works in your situation is to plant it and compare it to currently available cultivars.

Todd Baughman
Texas A&M University
Extension Agronomist

Yellow herbicides are still one of the most effective and economical tools available. When properly used, yellow herbicides provide residual weed control of many problem broadleaf and grassy weeds. More importantly, it adds another mode-of-action to aid in resistant-weed management. The continued use of the yellow herbicides will help us maintain the effectiveness of ALS and glyphosate herbicides. One thing we often hear are concerns about peanut injury with the yellows. Research in Texas has indicated that when these herbicides are used properly, according to label directions, injury is minimal. The final thing to consider with yellow herbicides is proper incorporation mechanically or with irrigation. With overhead irrigation, make sure the system is calibrated, and that 0.75 to 1-inch, which is preferable, of irrigation is applied.


David Jordan
North Carolina State University
Extension Agronomist
Herbicide-resistant weeds are a top priority, and in peanuts, the ALS-resistant weeds, such as Palmer amaranth and other pigweeds and cocklebur, are the biggest concern. With these weeds, it is important to have a sound program from the beginning so you don’t get behind. If Cadre or Pursuit (or Strongarm as a PPI or PRE treatment or Classic as a salvage) can’t be used, it is critical weeds do not get too large before controlling them with Cobra, Ultra Blazer, Storm or paraquat (4 inches is too large.) At-planting programs with a DNA herbicide like Prowl or Sonalan, PRE applications of Dual Magnum or Outlook with Valor SX, and timely applications of paraquat plus Basagran will buy time for postemergence applications of Cobra, Storm or Ultra Blazer. Don’t get me wrong: Cadre, Pursuit and Strongarm are excellent herbicides. But, resistance to ALS herbicides, which these three are, requires us to think differently about widespread use.

Kris Balkcom
Auburn University
Agri-Program Associate

Growers often ask which tillage method is best in peanuts. The key to making the tillage work is to ensure good seed-to-soil contact, which provides a uniform stand with a healthy plant. The moldboard plow buries all the debris and residue from the surface that could interfere with the seed-to-soil contact, offering the highest yield, but most expensive method. In strip till, residue that remains on the surface decays, increasing the soil organic matter creating a healthier soil. The problem with strip till is what we call hair pining. If you have flat land, then ripping and bedding is a method that conserves moisture in the beds until they are knocked down at planting time. The most important factor in peanuts is ensuring a uniform stand with rapid emergence, and the rip and bed accomplishes that well.

PG