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Results of 2003 Early, Mid and Full Season, and Roundup Ready Cotton Variety Tests in Florida
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 Material Information
Title: Results of 2003 Early, Mid and Full Season, and Roundup Ready Cotton Variety Tests in Florida
Physical Description: Fact Sheet
Creator: Wright, David L.
Publisher: University of Florida Cooperative Extension Service, Institute of Food and Agriculture Sciences, EDIS
Place of Publication: Gainesville, Fla.
Publication Date: 2004
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Acquisition: Collected for University of Florida's Institutional Repository by the UFIR Self-Submittal tool. Submitted by Melanie Mercer.
Publication Status: Published
General Note: "Publication date April 2004."
General Note: "SS-AGR-222"
 Record Information
Source Institution: University of Florida Institutional Repository
Holding Location: University of Florida
Rights Management: All rights reserved by the submitter.
System ID: IR00001603:00001

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SS-AGR-222 Results of 2003 Early, Mid and Full Season, and Roundup Ready Cotton Variety Tests in Florida1 D.L. Wright, P.J. Wiatrak, J.J. Marois and B. Kidd 2 1. This document is SS-AGR-222, a publication of the Agronomy Department, Florida Cooperative Extension Services, Institute of Food and Agricultural Sciences, Univeristy of Florida. Publication date April 2004. Please visit the EDIS web site at http://edis.ifas.ufl.edu. 2. D.L. Wright, professor, Agronomy Department, North Florida Research and Education Center-Quincy, FL; P.J. Wiatrak, assistant in Agronomy, North Florida Research and Education Center-Quincy, FL; J.J. Marois, professor, Plant Pathology Department, North Florida Research and Education Center-Quincy, FL; B. Kidd, biological scientist, North Florida Research and Education Center-Quincy, FL; Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611. The use of trade names in this publication is solely for the purpose of providing specific information. UF/IFAS does not guarantee or warranty the products named, and references to them in this publication does not signify our approval to the exclusion of other products of suitable composition. The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. U.S. Department of Agriculture, Cooperative Extension Service, University of Florida, IFAS, Florida A. & M. University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Larry Arrington, Dean Cotton was planted with a cone planter at the seeding rate of 85 seeds/20 ft of row with 36 row spacing on 5 May, 2003 after strip tilling into tilled small grain cover crops. Thimet 20 G was applied in furrow at 6.5 lb/A. Early Season Cotton Variety Trial Sixteen cotton varieties were planted in this trial on 12 May. On 13 May, the study was fertilized with 3-9-18 (N-P2O5-K2O) fertilizer at 400 lb/A placed 2-3 inch from the planted row using an FP row fertilizer applicator. The variety trial was broadcast sprayed with Cotoran @ 1 qt/A + Prowl @ 1 qt/A on 15 May, Cotoran @ 1 pt/A + Bueno 6 @ 1 pt/A on 2 June, and Dual II Magnum @ 1 pt/A on 6 June. On 10 June, cotton was side-dressed with ammonium nitrate (34 % N) at 176.5 lb/A (60 lb N/A). The study was direct sprayed with Cotoran @ 1 qt/A + Karmex @ 1.5 lb/A + Induce @ 2 qt/100 gal of solution on 23 June and broadcast sprayed with Mepex @ 12 oz/A + Agridex oil @ 2 pt/A + Kinetic @ 9 oz/100 gal of solution on 30 June, Poast Plus @ 3.75 pt/A + Agridex oil @ 2 pt/A on 9 July, Mepex @ 12 oz/A + Agridex oil @ 2 pt/A + Kinetic @ 9 oz/100 gal of solution on 17 July, Mepex @ 16 oz/A + Agridex oil @ 2 pt/A + Kinetic @ 9 oz/100 gal of solution on 30 July, Penncap M @ 3 pt/A on 31 July, Mepex @ 8 oz/A + Induce @ 1 qt/A on 14 August, Baythroid 2 @ 2.6 oz/A + Induce @ 1 qt/A on 25 August, and defoliated with Finish @ 1.5 pt/A + Ginstar @ 6 oz/A on 2 October. On 1 November, the early variety trial was picked with the International Cotton Spindle Picker. The plot area was irrigated with 0.25 inch water on 9 May and 0.5 inch water on 13 May. Mid and Full Season Cotton Variety Trial The mid and full season variety trial was planted with sixteen cotton varieties on 14 May. The same day, cotton was fertilized with 3-9-18 (N-P2O5-K2O) fertilizer at 400 lb/A placed 2-3 inch from the planted row using an FP row fertilizer applicator. The study was broadcast sprayed with Cotoran @ 1 qt/A + Prowl @ 1 qt/A on 15 May, Cotoran @ 1 pt/A +

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Results of 2003 Early, Mid and Full Season, and Roundup Ready Cotton Variety Tests in.... 2 Bueno 6 @ 1 pt/A on 2 June, and Dual II Magnum @ 1 pt/A on 6 June. On 10 June, cotton was side-dressed with ammonium nitrate (34 % N) at 176.5 lb/A (60 lb N/A). The study was direct sprayed with Cotoran @ 1 qt/A + Karmex @ 1.5 lb/A + Induce @ 2 qt/100 gal of solution on 23 June. Cotton was broadcast sprayed with Mepex @ 12 oz/A + Agridex oil @ 2 pt/A + Kinetic @ 9 oz/100 gal of solution on 30 June, Poast Plus @ 3.75 pt/A + Agridex oil @ 2 pt/A on 9 July, Mepex @ 12 oz/A + Agridex oil @ 2 pt/A + Kinetic @ 9 oz/100 gal of solution on 17 July, Mepex @ 16 oz/A + Agridex oil @ 2 pt/A + Kinetic @ 9 oz/100 gal of solution on 30 July, Penncap M @ 3 pt/A on 31 July, Mepex @ 8 oz/A + Induce @ 1 qt/A on 20 August, Baythroid 2 @ 2.6 oz/A + Induce @ 1 qt/A on 25 August, and defoliated with Finish @ 1.5 pt/A + Ginstar @ 6 oz/A on 17 October. On 20 and 21 November, the variety trial was picked with the Cotton Spindle Picker. The study was irrigated with 0.5 inch water on 13 and 15 May. Roundup Ready Variety Trial On 8 May, 26 Roundup Ready cotton varieties were planted in this trial and fertilized with 3-9-18 (N-P2O5-K2O) fertilizer at 400 lb/A placed 2-3 inch from the planted row using an FP row fertilizer applicator. Cotton was broadcast sprayed with Roundup WeatherMax @ 1 pt/A on 9 May, and Roundup WeatherMax @ 1 qt/A + Dual 2 Magnum @ 1 pt/A on 23 May. On 10 June, cotton was side-dressed with ammonium nitrate (34 % N) at 176.5 lb/A (60 lb N/A). The study was direct sprayed with Cotoran @ 1 qt/A + Karmex @ 1.5 lb/A + Induce @ 2 qt/100 gal of solution and broadcast sprayed with Mepex @ 16 oz/A + Agridex oil @ 2 pt/A + Kinetic @ 9 oz/100 gal of solution on 23 June. On 24 June, cotton was broadcast sprayed with Staple @ 1.8 oz/A + Induce @ 1 qt/100 gal of solution. The study was broadcast sprayed with Mepex @ 12 oz/A + Agridex oil @ 2 pt/A + Kinetic @ 9 oz/100 gal of solution on 17 July, Mepex @ 16 oz/A + Agridex oil @ 2 pt/A + Kinetic @ 9 oz/100 gal of solution on 30 July, Penncap M @ 3 pt/A on 31 July, Mepex @ 8 oz/A + Induce @ 1 qt/A on 14 August, Baythroid 2 @ 2.6 oz/A + Induce @ 1 qt/A on 25 August, and defoliated with Finish @ 1.5 pt/A + Ginstar @ 6 oz/A on 7 October. On 21 and 22 November, the variety trial was picked with the Cotton Spindle Picker. The study was irrigated with 0.3 inch water on 9 May and 0.5 inch water on 13 and 15 May. Results The seed + lint and lint yields, percent lint, and lint quality analysis for the Early and Mid + Full Season, and Roundup Ready cotton are shown in Tables 1-3. Key Management Considerations for Cotton Production 1. Variety selection check variety trials from as many locations close to your area as possible to select those varieties that yield high and have good lint characteristics. 2. Conservation tillage Strip-till planting decreases erosion, increases soil organic matter, soil moisture, and improves soil texture and may result in increased yields. Cover crops should be killed 3 to 4 weeks prior to planting to reduce insect problems and prevent soil moisture depletion. 3. Planting dates plantings made from mid April to mid-June are suitable for cotton in Florida. 4. Plant populations desired cotton plant population is 2-3 plants per foot of row. To get this population, plant 4-5 seeds per foot of row. 5. Adequate and timely N fertilization both insufficient and excess nitrogen can lead to fruit shed or boll rot. Nitrogen should be applied near the row, early in the season at first squaring. Two applications may be made on sandy soils (at squaring and 3 weeks later). The recommended rate of nitrogen ranges from 50 to 90 lbs N/A on most soils. 6. Weed control effective weed control is one of many critical components of successful cotton production. Weeds must be controlled early for best yields and lowest cost. Use of varieties with insect and herbicide tolerance make management decisions easier.

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Results of 2003 Early, Mid and Full Season, and Roundup Ready Cotton Variety Tests in.... 3 7. Insect control effective scouting with timely and proper insect management of bollworms, armyworms, and stinkbugs is very important. 8. Timely defoliation and harvest if the defoliation is delayed until 60-65 percent of the total crop to be harvested is open, 90 percent of the crop can likely be harvested within two weeks after the application.

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Results of 2003 Early, Mid and Full Season, and Roundup Ready Cotton Variety Tests in.... 4 Table 1. Early Season Cotton Variety Trial at Quincy, FL in 2003. Brand Variety Seed + lint cotton yield -lb/A -Percent lint -% -Lint cotton yield -lb/A -Mic. Length Staple Strength Uniform. Delta and Pine Land DP 432 RR 3138 40.9 1284 4.0 1.14 37 27.3 84 Delta and Pine Land SG 215 BG/RR 2883 40.9 1177 4.2 1.08 35 25.9 83 Delta and Pine Land DPLx00W12 2726 41.8 1137 4.2 1.19 38 28.8 84 Delta and Pine Land DP 451 B/RR 2676 40.5 1084 4.0 1.15 37 27.6 83 Delta and Pine Land DP 444 BG/RR 2517 42.7 1072 3.4 1.12 36 27.4 83 Bayer CropScience FiberMax 989 BR 2599 40.7 1057 4.0 1.12 36 30.5 83 Delta and Pine Land Sure-Grow 105 2567 40.0 1028 4.1 1.12 36 28.5 83 Delta and Pine Land DPLx02x71R 2462 40.3 989 4.1 1.10 35 27.2 83 Delta and Pine Land Sure-Grow 521 R 2419 40.8 984 3.9 1.09 35 25.8 83 Bayer CropScience FiberMax 960 BR 2494 39.2 978 4.2 1.12 36 31.9 84 Delta and Pine Land DP 436 RR 2359 39.7 937 4.1 1.13 37 26.6 83 Delta and Pine Land DP 424 BGII/RR 2339 39.6 930 4.2 1.10 36 27.2 84 Delta and Pine Land DPLx01Z34 2235 41.6 930 3.7 1.13 37 28.4 83 Delta and Pine Land DPLx01W99R-074 2171 40.9 888 3.5 1.20 39 27.2 82 Bayer CropScience FiberMax 989 RR 2073 40.9 847 4.0 1.12 36 30.8 84 Delta and Pine Land DP 449 BG/RR 1886 41.1 776 3.6 1.13 36 29.3 83 Mean 2471 40.7 1006 3.9 1.13 36 28.1 83 LSD(0.05) NS 1.2 NS NS 0.05 1.8 NS NS

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Results of 2003 Early, Mid and Full Season, and Roundup Ready Cotton Variety Tests in.... 5 Table 2. Mid and Full Season Cotton Variety Trial at Quincy, FL in 2003. Brand Variety Seed + lint cotton yield -lb/A -Percent lint -% -Lint cotton yield -lb/A -Mic. Length Staple Strength Uniform. Delta and Pine Land DP 555 BG/RR 2701 42.3 1146 3.9 1.08 35 29.6 82 Stoneville ST 5242BR 2468 40.3 996 3.9 1.14 37 28.9 83 Delta and Pine Land DP 449 BG/RR 2503 38.8 972 3.7 1.13 37 30.5 83 Bayer CropScience FiberMax 991 RR 2453 38.4 942 3.8 1.14 37 32.0 84 Delta and Pine Land DP 494RR 2339 39.7 930 3.8 1.10 35 33.0 84 Delta and Pine Land DPLx02x38 R 2282 39.7 909 3.9 1.17 38 28.0 83 Bayer CropScience FiberMax 991 BR 2282 38.9 889 4.2 1.15 37 33.1 84 Delta and Pine Land DPLx03x176 BR 2199 40.2 885 3.9 1.13 36 32.0 85 Delta and Pine Land DP 491 2116 40.0 847 3.9 1.12 36 31.6 84 Delta and Pine Land DP 493 1952 42.6 834 4.0 1.12 36 30.1 83 Delta and Pine Land DP 448 B 2245 36.5 819 3.7 1.16 37 29.1 83 Delta and Pine Land DPLx02x25 R 2044 39.6 811 4.0 1.20 39 30.2 83 Stoneville ST 5303 R 2070 39.2 807 3.8 1.13 37 31.4 83 Delta and Pine Land DP 458 B/RR 1980 38.8 769 3.8 1.15 37 29.9 82 Delta and Pine Land DP 5690 RR 1980 38.0 753 3.7 1.10 35 32.3 82 Delta and Pine Land Delta Pearl 1871 39.2 734 3.9 1.16 37 31.7 83 Delta and Pine Land DP 468 BGII/RR 1997 33.9 680 3.7 1.10 35 28.6 82 Mean 2205 39.2 866 3.8 1.13 36 30.7 83 LSD(0.05) NS 1.0 NS 0.26 NS 1.9 1.8 NS

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Results of 2003 Early, Mid and Full Season, and Roundup Ready Cotton Variety Tests in.... 6 Table 3. Roundup Ready Cotton Variety Trial at Quincy, FL in 2003. Brand Variety Seed + lint cotton yield -lb/A -Percent lint -% -Lint cotton yield -lb/A -Mic. Length Staple Strength Uniform. Stoneville ST 5242 BR 2879 41.6 1196 4.2 1.16 37 26.2 84 Delta and Pine Land SG 215 BG/RR 2662 40.0 1065 4.2 1.11 36 25.7 83 Delta and Pine Land DPLx03x176BR 2509 41.5 1040 4.1 1.10 35 29.5 83 Bayer CropScience FiberMax 989 BR 2481 40.6 1006 4.0 1.11 36 30.3 82 Delta and Pine Land DP 555 BG/RR 2296 43.1 989 4.0 1.10 35 28.9 82 Bayer CropScience FiberMax 989 RR 2437 40.6 989 4.2 1.11 36 29.7 83 Delta and Pine Land DP 424 BGII/RR 2562 37.9 970 4.5 1.11 36 26.3 84 Delta and Pine Land DPLx01W99R-074 2295 42.3 970 3.9 1.12 36 27.0 83 Delta and Pine Land DP 451 B/RR 2558 37.8 966 4.2 1.11 36 27.0 82 Delta and Pine Land DP 449 BG/RR 2399 39.9 959 4.3 1.10 36 28.2 83 Delta and Pine Land DPLx02x38R 2327 41.1 954 4.4 1.12 36 27.2 82 Delta and Pine Land Sure-Grow 521 R 2302 40.2 925 4.1 1.15 37 26.4 83 Stoneville ST 5303 R 2302 40.0 922 4.0 1.09 35 29.7 84 Delta and Pine Land DP 494 RR 2254 40.8 920 4.3 1.08 35 29.7 82 Bayer CropScience FiberMax 960 BR 2243 40.6 910 4.3 1.09 35 30.0 82 Bayer CropScience FiberMax 991 BR 2188 39.7 865 4.4 1.10 35 31.8 83 Delta and Pine Land DPLx02x25R 2046 41.8 852 4.5 1.11 36 29.4 83 Bayer CropScience FiberMax 991 RR 2093 39.3 822 4.2 1.11 36 30.2 82 Delta and Pine Land DP 5415 RR 2018 40.0 806 4.3 1.13 37 28.7 82 Delta and Pine Land DP 458 B/RR 1944 40.5 787 4.5 1.11 36 28.5 82 Delta and Pine Land DP 432 RR 1764 40.9 718 4.4 1.08 35 27.8 84 Delta and Pine Land DP 468 BGII/RR 1979 36.4 717 4.3 1.12 36 28.6 83 Delta and Pine Land DP 436 RR 1908 36.5 696 4.1 1.14 37 26.8 82 Delta and Pine Land DP 5690 RR 1695 39.2 664 4.3 1.06 34 29.3 81 Delta and Pine Land DP 444 BG/RR 1449 43.1 623 3.8 1.14 37 28.6 83 Delta and Pine Land DPLx02x71R 1500 41.1 613 4.5 1.14 36 28.2 83 Mean 2196 40.2 882 4.2 1.11 36 28.4 82 LSD(0.05) 694 1.0 280 0.35 NS NS 1.6 NS