Seminole Crop E News

Agricultural News for Farmers and Agribusiness in SW Georgia

Opportunity for Disease and Nematode Management in Peanuts Starts Now…

Posted by romeethredge on February 18, 2013

Dr Bob Kemerait, UGA Extension Plant Pathologist, says that despite lower contract prices for peanuts in 2013, we will not get a break in the need for effective programs for management of diseases and nematodes.  Now we have the opportunity in the winter months to make decisions that can improve and enhance disease management during the season and to protect yield at the end of the season.  Below are five points that I think you should consider now for their impact later in the season.

  1. Variety selection.  Although Georgia-06G will be the most popular variety again in 2013, growers should carefully consider other varieties, for example Georgia-07W for improved resistance to white mold and Tifguard for near immunity to the peanut root-knot nematode.  Growers should consult the 2013 version of Peanut Rx to assess the impact of tomato spotted wilt, white mold and leaf spot on any variety that they may desire to plant.

  2. Planting date.  With the reduced impact of tomato spotted wilt and research that clearly documents a reduction in yield potential as peanuts are planted into June, growers are now advised to consider planting a portion of their crop in April.  While such is likely to lead to an overall improvement in yield if done correctly, growers should note that earlier planting increases risk to tomato spotted wilt and white mold.  Growers should consult Peanut Rx 2013 to adopt measures to offset this risk due to planting date with other production practices or with an effective fungicide program for white mold.

  3. Management of nematodes.  With the loss of Temik 15G, our peanut growers now have a more difficult time protecting their crop from nematodes.  In fields where the peanut root-knot nematode is expected to be a significant problem in 2013, I strongly recommend that growers consider planting Tifguard or fumigating with Telone II (4.5-6 gal/A).  Growers planting peanuts in a field with significant populations of the peanut root-knot nematode must consider Telone II or Tifguard else they are likely to lose significant yield.  There will be no replacement for Temik in 2013.

  4. Early use of fungicides to manage white mold and CBR.  As has been discussed throughout the meeting season, in-furrow application of Proline fungicide is an effective tactic to battle CBR.  This disease has not been a problem for most growers in recent years, but it could become so again if we have a cooler and wetter spring.  Use of Proline, 5.7 fl oz/A banded at early emergence– 3 to 5 weeks after planting, offers season long benefits in the management of white mold.  Abound is now labeled for such an application as well.  Growers who do not use Proline or Abound as an early emergence banded application may still benefit from early broadcast applications of a product like tebuconazole (please consider resistance management issues with later fungicide applications) when tank-mixed with their initial leaf spot sprays.

  5. Using Peanut Rx in 2013.  In a year when contract prices for peanuts will likely be low, I strongly encourage growers to study our Peanut Rx revised for 2013 and to consider prescription fungicide programs offered by Syngenta, Bayer Crop Science, BASF, Nichino, Sipcam Agro, and Arysta LifeSciences.  In fields found to be at reduced risk, these companies will stand behind reduced-input programs that maintain top yields and reduce the cost of the fungicide programs.    peanut Rx                                                                                                                                                Peanut Rx can be found in the Peanut Production Guide available at this link. http://www.caes.uga.edu/commodities/fieldcrops/peanuts/documents/2013UGAPeanutProductionGuide.pdf

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