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Results of 2002 Early, Mid, and Full Season and Roundup Ready Cotton Variety Tests in Florida
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 Material Information
Title: Results of 2002 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: 2003
 Notes
Acquisition: Collected for University of Florida's Institutional Repository by the UFIR Self-Submittal tool. Submitted by Melanie Mercer.
Publication Status: Published
General Note: "Revised January, 2003."
General Note: "SS-AGR-163"
 Record Information
Source Institution: University of Florida Institutional Repository
Holding Location: University of Florida
Rights Management: All rights reserved by the submitter.
System ID: IR00001551:00001

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SS-AGR-163 Results of 2002 Early, Mid, and Full Season and Roundup Ready Cotton Variety Tests in Florida1 D. L. Wright, B. Kidd, P. J. Wiatrak, and J. J. Marois2 1. This document is SS-AGR-163, one of a series of the Agronomy Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Revised January, 2003.Visit the EDIS Web Site at http://edis.ifas.ufl.edu. 2. D. L. Wright, professor, Agronomy Department; B. Kidd, Senior Biological Scientist; P. J. Wiatrak, Assistant in; J. J. Marois, professor, Plant Pathology Department; North Florida Research and Education Center, Quincy FL. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32610. 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 is an equal opportunity/affirmative action employer authorized to provide research, educational information and other services only to individuals and institutions that function without regard to race, color, sex, age, handicap, or national origin. For information on obtaining other extension publications, contact your county Cooperative Extension Service office. Florida Cooperative Extension Service/Institute of Food and Agricultural Sciences/University of Florida/Christine Taylor Waddill, Dean. Cotton has been a major row crop for Florida growers over the last several years. It has replaced corn and soybean as the main row crops grown across the northern part of the state and is widely used as a rotation crop with peanut. Varieties and production practices have changed much over the past few years due to biotechnology. Variety selection is one of the most important decisions that a grower can make and he has only one chance to make the right decision. Cultural Practices for the Short Season Cotton Variety Trial These studies were conducted on a Dothan sandy loam soil (fine loamy siliceous, thermic Plinthic Kandiudult) at the NFREC, Quincy Research Station. Cotton was planted strip-till on 23 April into previous year's cotton stubble with a cone planter at the seeding rate of 80 seeds/20 ft of row and 36 row spacing with Thimet 20 G applied in furrow at 5 lbs/A for thrips control. The same day the study was band-direct fertilized with 3-9-18 (N-P2O5-K2O) at 400 lbs/A. The variety trial was sprayed pre-emergence with herbicides Prowl @ 1 qt/A + Cotoran @ 1 qt/A on 24 April and broadcast-sprayed with Tracer @ 2.9 oz/A for thrips control and Staple @ 0.66 oz/A + Induce @ 1 pt/100 gal water on 9 May. Cotton was sidedressed with 34-0-0 (N-P2O5-K2O) fertilizer at 176 lbs/A on 28 May and sprayed with Pix @ 1 pt/A + Agridex @ 2 pt/A on 14 June and 8 July to control growth. The variety trial was direct-sprayed with Direx 4 L @ 0.4 qt/A + Roundup Ultra Max @ 1.5 pts/A on 24 June, broadcast-sprayed with Decis @ 2 oz/A + Agridex @ 1.5 pts/A on 11 July for insect control, Pix @ 0.5 pt/A + Agridex @ 2 pts/A on 23 July, and Decis @ 2.56 oz/A + Agridex @ 1.5 pt/A on 31 July. On 17 September cotton was defoliated with CottonQuick @ 2 qt/A + Folex @ 6 oz/A + Dropp @ 0.2 qts/A. The variety trial was picked with the International Cotton Spindle Picker on 11 October. Cultural Practices for the Mid and Full Season Cotton Variety Trial Cotton was planted at the seeding rate of 80 seeds/20 ft of row and 36 row spacing with Thimet 20 G applied in furrow at 5 lbs/A on 17 April. The same day cotton was band-direct fertilized with 3-9-18 (N-P2O5-K2O) at 400 lbs/A. Cotton was

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Results of 2002 Early, Mid, and Full Season and Roundup Ready Cotton Variety Tests in.... 2 broadcast-sprayed with herbicides Cotoran @ 1 pt/A + Bueno 6 (MSMA) @ 1 pt/A on 26 April. Due to poor emergence the trial was replanted on 15 May, broadcast-sprayed with Cotoran @ 1 qt/A + Prowl @ qt/A on 16 May, and sprayed again with Cotoran @ 1 qt/A + Bueno 6 @ 1 pt/A on 10 June. Cotton was side-dressed with 34-0-0 (N-P2O5-K2O) fertilizer at 176 lbs/A on 17 June and sprayed with Staple @ 1.2 oz/A + Induce @ 1 qt/100 gal water on 27 June. The variety trial was sprayed with Pix @ 1 pt/A + Agridex @ 2 pt/A on 15 July and with Pix @ 0.5 pt/A + Agridex @ 2 pts/A on 23 July. On 5 and 19 August cotton was sprayed with the growth regulator Mepex @ 1 pt/A + Agridex @ 1.5 pts/A. The variety trial was broadcast-sprayed with Decis @ 2 oz/A + Agridex @ 1.5 pts/A on 9 September and defoliated with Finish @ 1.5 pts/A + Leafless @ 12 oz/A + Agridex @ 1 pt/A on 30 September. On 21 October cotton was picked with the International Cotton Spindle Picker. Cultural Practices for the Roundup Ready Variety Trial Cotton was planted at the seeding rate of 80 seeds/20 ft of row and 36 row spacing with Thimet 20 G applied in furrow at 5 lbs/A on 17 April. The next day cotton was band-direct fertilized with 3-9-18 (N-P2O5-K2O) at 400 lbs/A. Cotton was broadcast-sprayed with Roundup Ultra Max @ 1.5 pt/A on 26 April, Tracer @ 2.9 oz/A on 9 May, and Roundup Ultra Max @ 1 pt/A. Cotton was side-dressed with 34-0-0 (N-P2O5-K2O) fertilizer at 176 lbs/A on 28 May. On 10 June cotton was broadcast-sprayed with Staple @ 0.66 oz/A + Induce @ 1 qt/100 gal water. The variety trial was sprayed with Pix @ 1 pt/A + Agridex @ 2 pts/A on 14 June, direct-sprayed with Roundup Ultra Max @ 1.5 pts/A on 19 June, broadcast-sprayed with Pix @ 1 pt/A on 7 July, Decis @ 2 oz/A + Agridex @ 1.5 pts/A on 11 July, Pix @ 0.5 pt/A + Agridex @ 2 pts/A on 23 July, Decis @ 2.56 oz/A + Agridex @ 1.5 pts/A on 31 July, and defoliated with Finish @ 1.5 pt/A + Dropp @ 0.2 lb/A on 17 September. Cotton was picked with the International Cotton Spindle Picker on 7-11 October. Tables 1, 2, 3, 4, and 5 shows the emergence, seed + lint and lint yields, percent lint, and lint characteristics of the 2002 trials. Data from several locations and years should be used to determine best varieties and consistency of yield over varying weather conditions encountered each year. Key management Considerations for Cotton Production 1. Variety selection variety trials compare many factors such as yields and lint quality under management at each location. 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 and moisture deficit problems. 3. Planting dates plantings made from April to mid-June when soil temperature is adequate for germination will result in good yields in most years. 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. 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. 7. Insect control effective scouting with timely and proper insect management to control bollworms, budworms, and stinkbugs is very important. 8. Timely defoliation and harvest if the defoliant application is delayed until 60 percent of the bolls are open, most of the crop should be ready to harvest within two weeks after application.

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Results of 2002 Early, Mid, and Full Season and Roundup Ready Cotton Variety Tests in.... 3 Table 1. Early Season Cotton Variety Trial: NFREC, Quincy, FL Entry # Brand Hybrid Emergence -% -Seed + lint cotton yield -lb/A -Lint cotton yield -lb/A -Percent lint -% -6 Delta and Pine Land DP 555 BG/RR 57.7 2613 1188 45.4 10 Delta and Pine Land SG 215 BG/RR 57.7 2778 1163 41.9 9 Delta and Pine Land Sure-Grow 105 65.5 2698 1142 42.3 8* Delta and Pine Land DPLx00S13 BR 69.3 2492 1111 44.5 7 Delta and Pine Land DPLx99x35 62.8 2449 1108 45.4 12 Delta and Pine Land Sure-Grow 521 R 64.1 2560 1091 42.6 11 Delta and Pine Land Sure-Grow 501 BR 65.2 2590 1068 41.4 5 Delta and Pine Land DP 451 B/RR 59.7 2561 1037 40.5 4 Delta and Pine Land DP 436 RR 62.7 2611 1019 39.1 3 Aventis FM 958 B 68.9 2357 1017 43.2 2 Aventis FM 966 64.9 2362 1016 43.1 1 Aventis FM 958 72.3 1886 809 42.8 Mean 64.2 2496 1064 42.7 LSD(0.05) NS NS NS 1.08 *Delta and Pine Land DPLx00S13 BR has a new name: DP 444 BG/RR. Table 2. Early Season Cotton Variety Trial: NFREC, Quincy FL (cont.) Entry # Brand Hybrid Mike Len Strength Uniformity Trash HVI Color Color RD Color +B 1 Aventis FM 958 41.7 116 31.5 83.3 15.0 51-2 67.6 79.0 2 Aventis FM 966 41.0 113 31.7 84.0 19.0 54-4 66.0 75.0 3 Aventis FM 958 B 39.0 110 30.9 83.7 17.3 51-2 67.7 73.0 4 Delta and Pine Land DP 436 RR 44.0 112 26.4 83.3 12.3 54-3 66.7 76.0 5 Delta and Pine Land DP 451 B/RR 45.0 112 27.7 83.3 15.0 51-3 67.3 80.3 6 Delta and Pine Land DP 555 BG/RR 41.7 111 28.3 81.0 17.7 54-2 67.7 68.0 7 Delta and Pine Land DPLx99x35 44.7 110 26.3 83.3 16.7 58-1 67.3 70.3 8* Delta and Pine Land DPLx00S13 BR 42.3 108 26.6 83.7 12.3 54-3 67.3 76.0 9 Delta and Pine Land Sure-Grow 105 44.7 111 28.8 85.0 13.7 52-2 67.7 81.0

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Results of 2002 Early, Mid, and Full Season and Roundup Ready Cotton Variety Tests in.... 4 Table 2. Early Season Cotton Variety Trial: NFREC, Quincy FL (cont.) Entry # Brand Hybrid Mike Len Strength Uniformity Trash HVI Color Color RD Color +B 10 Delta and Pine Land SG 215 BG/RR 44.7 107 25.8 83.7 15.3 51-3 67.0 77.7 11 Delta and Pine Land Sure-Grow 501 BR 45.7 108 26.9 84.0 19.7 52-3 66.0 80.0 12 Delta and Pine Land Sure-Grow 521 R 45.3 105 25.0 83.3 14.7 51-3 67.7 76.3 Mean 43.3 110 28.0 83.5 15.7 53-2 67.2 76.1 LSD(0.05) 2.77 3.42 1.68 1.21 NS NS NS 5.95 *Delta and Pine Land DPLx00S13 BR has a new name: DP 444 BG/RR Table 3. Mid and Full Season Cotton Variety Trial: NFREC, Quincy, FL. Entry # Brand Hybrid Emergence -% -Seed + lint cotton yield -lb/A -Lint cotton yield -lb/A -Percent lint -% -12 Delta and Pine Land DP 555 BG/RR 67.0 2821 1222 43.3 18 Delta and Pine Land Delta PEARL 68.3 2675 1123 42.0 7 Delta and Pine Land DP 458 B/RR 64.8 2517 1029 40.9 11 Delta and Pine Land DP 545 BG/RR 64.8 2377 1028 43.3 19 Stoneville ST 4892 BR 66.3 2391 1025 43.0 9 Delta and Pine Land DP 493 66.4 2306 1017 44.0 22 Stoneville ST 580 62.7 2476 1004 40.5 13 Delta and Pine Land DP 565 68.9 2444 990 40.6 2 Aventis FM 989 R 63.4 2370 964 40.6 20 Stoneville ST 4793 R 60.6 2127 906 42.6 21 Stoneville ST 5599 BR 67.7 2028 864 42.5 5 Delta and Pine Land DP 448 B 60.6 2197 860 39.2 1 Aventis FM 989 BR 67.7 2059 836 40.6 6 Delta and Pine Land DP 449 BG/RR 75.9 2034 829 40.8 17 Delta and Pine Land NuCOTN 35 B 68.9 1998 805 40.6 3 Aventis FM 991 R 64.7 2001 802 40.1 16 Delta and Pine Land NuCOTN 33 B 63.6 1949 775 39.6

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Results of 2002 Early, Mid, and Full Season and Roundup Ready Cotton Variety Tests in.... 5 Table 3. Mid and Full Season Cotton Variety Trial: NFREC, Quincy, FL. Entry # Brand Hybrid Emergence -% -Seed + lint cotton yield -lb/A -Lint cotton yield -lb/A -Percent lint -% -23 Stoneville STx0003 RR 63.9 1891 772 40.9 8 Delta and Pine Land DP 491 73.3 1687 742 43.5 15 Delta and Pine Land DP 655 B/RR 61.6 1752 701 40.0 14 Delta and Pine Land DP 5690 RR 71.6 1699 676 39.7 10 Delta and Pine Land DP 5415 RR 66.1 1568 646 41.0 4 Aventis FM 989 32.5 1599 631 39.4 Mean 64.8 2129 880 41.2 LSD(0.05) 9.13 NS 314.2 1.33 Table 4. Mid and Full Season Cotton Variety Trial: NFREC Quincy, FL. (cont.) Entry # Brand Hybrid Mike Len Strength Uniformity Trash HVI Color Color RD Color +B 1 Aventis FM 989 BR 41.3 112 29.8 82.3 18.7 51-2 68.3 79.3 2 Aventis FM 989 R 41.0 113 30.3 83.0 16.3 48-1 69.3 79.0 3 Aventis FM 991 R 43.0 115 30.3 83.3 15.0 52-1 67.7 85.7 4 Aventis FM 989 41.0 116 31.2 83.3 14.3 41-3 71.3 79.7 5 Delta and Pine Land DP 448 B 43.0 114 28.9 83.7 13.7 51-2 69.7 79.0 6 Delta and Pine Land DP 449 BG/RR 41.7 112 30.4 83.3 14.0 51-1 69.0 77.7 7 Delta and Pine Land DP 458 B/RR 44.7 113 29.1 83.3 13.7 51-2 69.0 79.3 8 Delta and Pine Land DP 491 41.7 119 31.3 82.7 17.0 52-2 67.7 85.0 9 Delta and Pine Land DP 493 43.0 113 30.7 82.7 16.7 51-3 68.0 75.7 10 Delta and Pine Land DP 5415 RR 44.3 113 28.5 83.0 14.7 52-2 68.7 84.7 11 Delta and Pine Land DP 545 BG/RR 40.7 111 29.3 82.0 12.3 51-2 70.0 76.0 12 Delta and Pine Land DP 555 BG/RR 40.7 113 28.4 82.7 14.0 51-2 68.3 79.3

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Results of 2002 Early, Mid, and Full Season and Roundup Ready Cotton Variety Tests in.... 6 Table 4. Mid and Full Season Cotton Variety Trial: NFREC Quincy, FL. (cont.) Entry # Brand Hybrid Mike Len Strength Uniformity Trash HVI Color Color RD Color +B 13 Delta and Pine Land DP 565 45.7 116 29.6 84.0 12.0 51-2 70.3 74.3 14 Delta and Pine Land DP 5690 RR 42.3 112 30.8 83.0 12.0 48-2 69.0 81.7 15 Delta and Pine Land DP 655 B/RR 43.0 111 29.7 83.0 12.7 52-2 68.7 85.0 16 Delta and Pine Land NuCOTN 33 B 44.7 115 28.9 84.3 12.3 51-2 68.3 81.7 17 Delta and Pine Land NuCOTN 35 B 44.3 111 30.5 83.0 12.0 48-1 68.3 83.0 18 Delta and Pine Land Delta PEARL 41.7 113 30.9 82.7 13.7 51-2 69.7 74.3 19 Stoneville ST 4892 BR 48.3 109 28.1 83.7 13.0 52-1 68.3 81.3 20 Stoneville ST 4793 R 47.7 108 28.1 84.0 10.3 48-2 67.3 88.0 21 Stoneville ST 5599 BR 41.0 111 28.8 82.7 12.7 52-2 67.3 85.0 22 Stoneville ST 580 46.3 112 28.4 83.7 13.3 48-2 69.7 80.7 23 Stoneville STx0003 RR 45.0 110 29.3 84.0 11.7 51-2 69.0 79.7 Mean 43.3 113 29.6 83.2 13.7 50-2 68.8 80.7 LSD(0.05) 3.67 3.46 1.36 NS NS NS NS NS Table 5. Roundup Ready Cotton Variety Trial: NFREC Quincy, FL. Entry # Brand Hybrid Seed + lint cotton yield -lb/A -Lint cotton yield -lb/A -Percent lint -% -8 Delta and Pine Land DP 555 BG/RR 3105 1447 46.6 3 Aventis FM 991 R 2979 1262 42.3 17 Stoneville ST 4892 BR 2863 1253 43.8 14 Delta and Pine Land SG 215 BG/RR 2812 1200 42.7 16 Delta and Pine Land Sure-Grow 521 R 2754 1156 42.0 7 Delta and Pine Land DP 545 BG/RR 2523 1132 44.8 5 Delta and Pine Land DP 458 B/RR 2569 1110 43.2 15 Delta and Pine Land Sure-Grow 501 BR 2693 1100 41.0

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Results of 2002 Early, Mid, and Full Season and Roundup Ready Cotton Variety Tests in.... 7 Table 5. Roundup Ready Cotton Variety Trial: NFREC Quincy, FL. Entry # Brand Hybrid Seed + lint cotton yield -lb/A -Lint cotton yield -lb/A -Percent lint -% -18 Stoneville ST 4793 R 2420 1068 44.1 12 Delta and Pine Land DP 451 B/RR 2454 1016 41.4 10 Delta and Pine Land DP 655 B/RR 2269 951 41.9 9 Delta and Pine Land DP 5690 RR 2254 950 42.3 6 Delta and Pine Land DP 5415 RR 2144 937 43.8 13* Delta and Pine Land DPLx 00S13 BR 2108 930 44.2 19 Stoneville ST 5599 BR 2121 924 43.4 2 Aventis FM 989 R 2096 905 43.2 20 Stoneville ST x 0003 RR 2016 861 42.7 4 Delta and Pine Land DP 449 BG/RR 1952 839 42.9 11 Delta and Pine Land DP 436 RR 2030 822 40.5 1 Aventis FM 989 BR 1983 806 40.8 Mean 2407 1033 42.9 LSD(0.05) 499.8 216.9 1.47 *Delta and Pine Land DPLxOOS13 BR has a new name: DP 444 BG/RR.