1. UGA Cotton Extension Program Guy D. Collins, Ph.D. Extension Cotton Agronomist University of Georgia Tifton, GA

2. 2010…Replacing DP 555 BG/RR DP 555 BG/RR planted on approximately 82.53 % of cotton acres in GA during 2009 Total 2009 GA cotton acreage = 990,000 Dealers allotted 33 % of 2009 DP 555 BG/RR for 2010 2010 GA cotton acreage = 1,250,000 In 2010, an estimated 900,000+ acres will be planted to new/other varieties

3. Variety selection criteria YIELD potential YIELD stability Technology Fiber quality Maturity and plant growth characteristics

4. Late Varieties – Irr. & Dryland - by technology Lint Yield (lbs/A)

5. 2009 GA County Trials – Dryland (Burke, Candler, Colquitt, Early, Jefferson, Lowndes, SE Gin) Inconsistency among varieties tested at each location….difficult to evaluate!! Lint Yield (lbs/A)

6. Uniform County Variety Trial Program 15 trial sites and 22 cooperating agents Training / mentoring program for younger agents Funds to support plant growth evaluation and harvest equipment Similar trial for Dr. Peng Chee’s conventional lines

7. ____________Irrigated____________________Dryland________ Avg Yield - locs combined Variety BainbridgeMidvillePlainsTiftonMidvillePlainsTifton FM 1740 B2RF16832145211921871651177019391928 DG 2570 B2RF15382111237719801730191317941920 09R619 B2R214662101256320341570180316951890 DP 0920 B2RF16912100216621541660172515301861 PHY 370 WR14551979225520051720175617531846 DP 0935 B2RF15102100225020061702170815571833 DP 0924 B2RF14382120217916491633177018741809 DP 0912 B2RF14072050229719181591182715081800 ST 5288 B2F12962140218918801537183416521790 PHY 367 WRF15911883211218871652167517251789 CG 3220 B2RF13152083215118121755153716121752 ST 4498 B2RF17221972206517521625157715421751 AM1550 B2RF14301762201420031508162317411726 PHY 375 WRF12971765202218811639175515691704 ST 4288 B2F13061941194819791479162514891681 2009 GA Cotton OVT Consistency & Variability – Top 15 Early Varieties excluding Athens

8. Yield FM 1740 vs. DP 555

9. Plant Height A AB B B - 7.5

10. Total Main-stem Nodes A BC B C - 5.28

11. Total Boll Production

12. Percent Open Bolls B AB A A +14.5%

13. Boll Production Compared to DP 555 BG/RR (1 st Position)

14. Early VarietiesLint Yield FM 1740 B2RF1928 DG 2570 B2RF1920 09R619 B2R21890 DP 0920 B2RF1861 PHY 370 WR1846 DP 0935 B2RF1833 DP 0924 B2RF1809 DP 0912B2RF1800 ST 5288 B2F1790 PHY 367 WRF1789 CG 3220 B2RF1752 ST 4498 B2RF1751 AM 1550 B2RF1726 PHY 375 WRF1704 ST 4288 B2F1681 BCSX 1035 LLB21670 SSG CT Linwood1666 NG 3331 B2RF1653 All-Tex Epic RF1648 2009 GA Cotton OVT – Irr. & Dry combined – Top 19 Varieties (Bainbridge, Midville, Plains,Tifton) Late VarietiesLint Yield DP 0949 B2RF1826 09R621 B2R21788 PHY 370 WR1774 DP 555 BG/RR1767 PHY 375 WRF1755 PHY 565 WRF1747 ST 5458 B2RF1721 DP 0935 B2RF1707 PHY 5922 WRF1699 DP 161 B2RF1698 PHY485 WRF1671 ST 5288 B2F1653 ST 5327 B2RF1644 DP 164 B2RF1624 BCSX 1015 LLB21620 FM 1845 LLB21609 PHY 480 WR1609 DP 174 RF1591 BCSX 1025 LLB21567

15. 2010 Weather

16. Changes in Management DP 555 BGRR ® = full-season variety, very aggressive growth New varieties = less aggressive growth??? earlier maturity ??? true cutout??

17. Growth Management for New Varieties New varieties….rank growth could still result when excessive rains occur BUT… pay close attention to plant growth when making PGR decisions, because excessive PGR use could inhibit yield potential in some of these newer early-maturing varieties -Prebloom apps -First bloom apps -Midbloom apps

18. DP 1050 B2RF Non-treated12 oz/A @ 9-10 leaves

19. PHY 565 WRF Non-treated12 oz/A @ 9-10 leaves

20. Plant Height – Nontreated Cotton inches

21. Plant Height – Treated Cotton inches

22. Percent of Non-treated (Height) percent

23. DP 1050 B2RF vs FM 1740 B2F Stance 3 oz/A @ 9-10 leaves Stance 2 oz/A @ 9-10 leaves

24. DP 1050 B2RF vs FM 1740 B2F Mepex 12 oz/A @ 9-10 leaves Mepex 8 oz/A @ 9-10 leaves

25. Prebloom Growth Management LRM 1xLRM 2xMEB 1xMEB 2x 9 leaf4 oz/A8 oz/A 16 oz/A + 1 week4 oz/A8 oz/A--------------------- + 2 week4 oz/A8 oz/A--------------------- First Bloom4 oz/A8 oz/A 16 oz/A Additionally, we are evaluating the necessity of prebloom applications, and or how well we can control growth with later-season applications

26. Prebloom Growth Management LRM 8 oz/A 4 apps MEB 8 oz/A 2 appsMEB 16 oz/A 2 apps LRM 4 oz/A 4 apps Non-treated

27. Collaborative/Other Projects

28. Questions ??