1 / 22

Extension Response to Contaminated 2,4-DB/Peanut Problems in 2007

Extension Response to Contaminated 2,4-DB/Peanut Problems in 2007. Eric P. Prostko*, J. Tim Flanders, and Scott N. Brown The University of Georgia. SWSS/WSSA - 2009. UGA Eric Prostko County Extension Agents Scott Brown – Colquitt Tim Flanders – Berrien Dealers Joe Dixon – Berrien

inari
Download Presentation

Extension Response to Contaminated 2,4-DB/Peanut Problems in 2007

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Extension Response to Contaminated 2,4-DB/Peanut Problems in 2007 Eric P. Prostko*, J. Tim Flanders, and Scott N. Brown The University of Georgia SWSS/WSSA - 2009

  2. UGA Eric Prostko County Extension Agents Scott Brown – Colquitt Tim Flanders – Berrien Dealers Joe Dixon – Berrien Growers At least 48 Industry Jim Shue (NuFarm) J.W. Christiansen (Aceto) Private Consultant Tim Adcock (Diligene Technologies) GA Department of Agriculture The Players

  3. 2,4-DB in Peanuts • One of the most commonly used herbicides • 50% of acres • 1-3 applications/year • From 2 WAP until 30 DBH • Annual morningglory, sicklepod, pigweed (?)

  4. Typical 2,4-DB Injury Symptoms

  5. 2007 Symptomology

  6. Berrien County – Dixon FarmAugust 23, 2007 (14 DAT) 2005 2,4-DB @ 1 pt/A Butoxone 175 @ 1 pt/A

  7. Contaminated Lots(> 250 ppm or 0.025%)

  8. What will 2,4-D and dicamba do to peanuts???? • Research in GA conducted over the past few years would suggest that 2 oz/A (0.778 oz ai/A) of 2,4-D would not cause many problems. • If contaminated product was applied at 24 oz/A then 2,4-D rate would only be 0.025-0.071 oz ai/A (0.03-0.09X)

  9. What will 2,4-D and dicamba do to peanuts???? • No data exists for peanut response to dicamba. • Peanuts are more sensitive to dicamba than 2,4-D. • Dicamba rate was equivalent to 0.041-0.048 oz ai/A • Normal dicamba (Banvel) rate for corn is 8 oz/A (3.08 oz ai/A) • 0.013-0.016X rate

  10. What happened at harvest?

  11. Table 1. Peanut Pod Numbers and Weights as Influenced by 2,4-DB formulation, Berrien County, September 14, 2007. 1Contaminated and Non-Contaminated samples collected from same field. 2Average of 10 plants.

  12. Table 2. Peanut yield (cv. Georgia Green) as influenced by 2,4-DB formulation, P.H. Danforth Farm, Berrien County, October 12, 2007. 1Contaminated and Non-Contaminated samples collected from same field. Plot size was 6’ X 130’. 2Adjusted to 10% moisture.

  13. Berrien County, 2007

  14. What did the company do? • Hired consultant to manage complaints • Information request form was mailed to all growers • Monies were distributed based upon comparison of 2007 yields to historical yields • Growers were happy and I was curious. • 2007 was a dry year • May to September: -6.54” deficit • Was yield loss due to product or dry weather?

  15. 2008 ResearchI just had to know for sure!!!! • Small plot research • Contaminated 2,4-DB • 24 oz/A + COC @ 1% • Applied at various stages (28, 45, 62, 78, 91, and 105 DAP) • Irrigated peanuts • Weed-free • Twin-row • AP-3 • Visual observations • yield

  16. Peanut Yield Response to Contaminated 2,4-DB, 2008 24 oz/A + 1% Peptoil P = 0.2142 CV = 8

  17. Peanut Pod Weights in Response to Contaminated 2,4-DB, 2008 24 oz/A + 1% Peptoil P = 0.3239 CV = 6

  18. 100 Seed Weights in Response to Contaminated 2,4-DB, 2008 24 oz/A + 1% Peptoil LSD 0.10 = 7 CV = 9

  19. Why is this important? • Peanut response to dicamba • Dicamba resistant crops are in the pipeline • More contamination/drift problems are likely • Dicamba/peanut tolerance studies were conducted in 7 locations in 2008 across peanut belt

  20. Peanut Response to Clarity (dicamba) 4SC @ 16 ozs/A Applied 30 DAP Applied 59 DAP Applied 91 DAP Photo 107 DAP

  21. www.gaweed.com

More Related