1. C.W. Bednarz and W.D. Shurley University of Georgia and W.S. Anthony USDA-ARS Losses in Yield, Quality, and Profitability of Cotton From Improper Harvest Timing

2. http://www.cottoninc.com/online/index.cfm

4. IS THIS PROBLEM DUE TO: ENVIRONMENT? Soil Type MANAGEMENT? Varieties Population Densities Insect Control Harvest Timing

5. PERCENT HARVESTED BY WEEK (5 year average) http://www.nass.usda.gov

6. CommodityPlantedHarvested GA Cotton4/25-5/2510/5-11/15 GA Peanut4/25-5/209/10- 10/15 Cotton and Peanut “Most Active” Planting and Harvest Dates http://www.nass.usda.gov

7. What is This Harvest Delay Costing Us? (Objectives of Study) Investigate the effects of harvest timing on fiber properties in general and percent uniformity in particular. Investigate the effects of harvest timing on lint yield. Investigate the effects of harvest timing on profitability.

8. Cotton Defoliation Timing Study CPES - Ponder Farm Established 13 treatments (weeks) in the study area. Applied harvest aids every week for 13 weeks (NACB and %OB) Machine picked each plot two weeks after applying harvest aids. Seed cotton ginned on mini gin and the USDA-ARS Lab. HVI and AFIS on lint samples (3 per plot). Data subject to ANOVA.

9. 199819992000 Week% OBHvDAP% OBHvDAP% OBHvDAP 06120171229133 1421273113030142 2691345513557147 3731416014358150 4921486414976155 51001557915780163 61001628316288170 71001699717094177 8100176100178100185 9100183100185100191 10100190100191100199 11100197100198100204 12100204100207100211 Harvest Dates

11. Uniformity 1998 ab a a a a aa a a b P>F 0.0929

12. Uniformity 1999 P>F 0.0026 cd abc ab a bcd e cd bcd cd de

13. Uniformity 2000 P>F 0.0017 d cd bc a abc ab d d d bc cd d

14. L(n)CV 1999 F = 4.17** c c c cc c bc ab aa

15. L(n)CV 2000 F = 6.19** bcd e de e cde abc bc abc ab a a

16. Why is Uniformity Changing? Increasing up to 70% OB Crop Maturity? Non-determinate Crop Decreasing after 70% OB Crop Weathering?

17. Strength 1998 P>F 0.0001 a b c bc c cde f cd ef de f def

18. Strength 1999 P>F 0.0001 ab aa abc bc d d cd d d

19. Strength 2000 F = 13.91** a a bbcbcd cdef def efg bcde fg g

20. HVI-UHM 1998 P>F 0.1699 a a a a a a a a aa a a a

21. HVI-UHM 1999 P>F 0.0833 a a a a a a a a a a a a a

22. HVI-UHM 2000 F = 3.94** ababc a bcde defcdef f bcde def f

23. AFIS-Length(n) 1999 P>F 0.0006 ab aaa a a abc bcd cd d

24. AFIS-Length(n) 2000 F = 8.70** cd ab abc a bcdcd defg deefg fg gg

25. AFIS-SFC(w) 1999 P>F 0.0071 cd bcd d d d d abcd abc ab abc a

26. AFIS-SFC(n) 2000 F = 9.24** def fg g efg def bcd cde bc ab a abc a

27. HVI Micronaire 1998 P>F 0.0011 c bc c ab a a a

28. HVI Micronaire 1999 P>F 0.0001 ee d bcdcd abc a ab

29. HVI Micronaire 2000 F = 59.40** g f e bcde cde bcdbca de bcbcdeab

30. Week 199819992000 EventsTotalEventsTotalEventsTotal -------------------------------------------------Inches-------------------------------------------------- 053.520.200 110.32 44.2 210.220.832.6 328.720.332.2 40031.352.1 534.210.900 630.741.311.5 733.80000 8000000 90011.000 10000000 11000041.1 1220.230.743.0 TOTAL2021.5206.72416.7 Rainfall During Harvest

31. Week199819992000 0413142 1413141 2 3142 3513141 4513141 55241 6523141 75141 85141 9514151 10514151 11614151 12614151 Color Grades

32. Week 199819992000 --------------------Cents per pound-------------------- 0+0.5 -2.0 1+0.5+1.5+0.5 2 -2.0 3-4.5+1.5+0.1 4-4.5+1.5+0.1 5-6.00-1.5 6-6.0+1.5-1.5 7-4.50-1.5 8-4.50-3.4 9-4.50-7.1 10-4.50-3.8 11-9.00-3.8 12-9.00-7.1 Sum of Premiums/Discounts

33. Week % OBLint% OBLint% OBLint 199819992000 0 61154 c17795 f9633 f 1 421313 ab31881 ef30823 e 2 691305 ab551054 de57896 de 3 731339 ab601343 ab581140 ab 4 921363 ab641412 ab761105 b 5 1001409 a801456 a801117 ab 6 1001361 ab831297 bc881153 ab 7 1001313 ab971237 cd941049 bc 8 1001355 ab1001275 bc1001219 a 9 1001224 bc1001314 bc1001144 ab 10 1001363 ab1001327 bc1001075 bc 11 1001226 bc100------100980 cd 12 1001286 abc1001338 abc100974 cd Lint Yields

35. CONCLUSIONS Application of Harvest-Aids at 60-80% Open Boll: Maximized Length Uniformity Fiber Length Lint Yield (1999) Profit (1999) Minimized Short Fiber Content