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Impact of Rotation and Fumigation on 2006 Cotton Production in Reniform Infested Cotton Fields.

Impact of Rotation and Fumigation on 2006 Cotton Production in Reniform Infested Cotton Fields. Gazaway, W.S., K. Lawrence, and J.R. Akridge Auburn University. Test Field. Placed in a cotton field with high reniform populations, located near Huxford, AL.

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Impact of Rotation and Fumigation on 2006 Cotton Production in Reniform Infested Cotton Fields.

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  1. Impact of Rotation and Fumigation on 2006 Cotton Production in Reniform Infested Cotton Fields. Gazaway, W.S., K. Lawrence, and J.R. Akridge Auburn University

  2. Test Field • Placed in a cotton field with high reniform populations, located near Huxford, AL. • Infested with reniform nematodes since mid 1980’s. • Sustained substantial yield losses to reniform nematodes over last 20 years.

  3. Evaluate: Non-host crops’ effect on cotton yield and on reniform populations. Compare 1- and 2-year rotations. If nematicide applied to cotton following rotation will further improve yield? Objective ofStudy

  4. Crops • Cotton- DPL449 BG/RR • Corn- Pioneer 33M53RR • Soybean- DPL 5634RR • Peanut- AP 3

  5. Nematicide • Telone II- applied to ½ the cotton plots. • Injected 3 gal/acre 18 in. deep into raised seed beds 3 weeks prior to planting.

  6. Rotation Study Design 4 rows wide X 40 ft long. 32 treatments. 4 replications. Designed so 1- and 2- year cotton yields could be compared the same year. Randomized split plot.

  7. 128 Plots- covers approximately 5 acres

  8. Treatments evaluated in 2006 • Yield data from Telone treated and untreated cotton plots following 1-year rotation with soybean, corn, peanut and continuous cotton.Total= 20 plots. • Nematode population data from 2 year non-host rotation plots plus 2006 cotton plots.Total= 32 plots.

  9. Data Evaluated in 2006

  10. 2006 Results

  11. Pooled Data for Nematicide

  12. Pooled Data for Crops

  13. No Crop x Nematicide Interaction-2006

  14. Peanut vs Cotton (+)(-) Nematicide Impact onReniform Populations

  15. 2 years versus 1 year non-host crops impact on reniform populations

  16. Conclusion • Addition of nematicide to cotton following 1 year of peanut and corn did not improve yield. • Nematicide did improve cotton yield following soybean or cotton. • One year rotation with corn and peanut as effective in improving cotton yield as Telone treatment.

  17. Conclusion • Reniform populations rebound to damaging levels in 1 year back in cotton. • Reniform populations higher in plots with 2 years cotton (2005 & 2006) than in plots with just one year in cotton (2006). • Two years of corn or peanut had lower reniform populations than 1 year corn or peanut (e.g.cotton in 2005; corn or peanut in 2006).

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