January 1984 Department of Agronomy and Soils Departmental Series No. 88 Alabama Agricultural Experiment Station Auburn University Au burn University, Alabama Gale A. Buchanan, Director TABLE OF-CONTENTS Page INTRODUCTION . EXPERIMENTAL CONDITIONS.......................1 EXPLANATION OF DATA........................ 1 NEW AND EXPERIMENTAL VARIETIES....................3 STATISTICAL ANALYSIS..........................................4 LOCATIONS OF EXPERIMENTS........................4 Table-1. Performance of Cotton Varieties at Belle Mina, Alabama, 1983............................5 Table 2. Performance of Cotton Varieties at Crossville, Alabama, 1983. ......................... 6 Table 3. Performance of Cotton Varieties at Prattville, Alabama, 1983. .......................... 7 Table 4. Performance of Cotton Varieties at Tallassee, Alabama, 1983............................8 Table 5. Performance of Cotton Varieties at Shorter, Alabama, 19839. .......................... 9 Table 6. Performance of Cotton Varieties at Monroeville, Alabama, 1983....................................10 Table 7. Performance of Cotton Varieties at Brewton, Alabama, 1983........................... .11 Table 8. Performance of Cotton Varieties at Headland, Alabama, 1983........................... 12 Table 9. Performance of Cotton Varieties in Alabama, Average of All Locations........................ 13 Table 10. Percentage of Plants Showing Symptoms of Fusarium Wilt . 14 Table 11. Fiber Properties of Cotton Varieties at Crossville, Alabama, 1983..... ................. 15 Table 12. Fiber Properties of Cotton Varieties at Prattville, Alabama, 1983.............................. 16 TABLE OF CONTENTS (continued) Table 13. Fiber Properties of Cotton Varieties at Headland, Alabama, 1983. . . . . . . . . . . . . . . . . . . . . . Table 14. Sources of Seed for the 1983 Cotton Variety Tests ... RECOMMENDED COTTON VARIETIES FOR ALABAMA .................. Information contained herein is available to all persons regardless of race, color, sex, or national origin. 17 18 19 1983 Alabama Cotton Variety Report A Report of the Performance of Cotton Varieties Tested in Alabama 1 W. C. Johnson and Darrell Williams- INTRODUCTION The Alabama Cotton Variety Test is a continuing evaluation of avail- able cotton varieties from private companies and state agricultural experi- ment stations. Breeding lines that are likely to be released as varieties are also tested. Tests are conducted on units of the Alabama Agricultural Experiment Station by Experiment Station personnel. Cultural practices are those generally recommended by Auburn University to farmers. Every effort is made to test the varieties and present the results in an unbiased manner. EXPERIMENTAL CONDITIONS A randomized block experimental design with four replications was used at each location. Plot row length at different locations varied from 40 to 120 feet. Plots were two-row at Prattville, Headland, Belle Mina, and Crossville. Single-row plots were used at the other locations. Rainfall was extremely short after July 1 in northern Alabama, but more nearly adequate elsewhere. September and October were dry throughout Alabama, giving near ideal harvest conditions. EXPLANATION OF DATA Harvest of Seed Cotton Tests at Prattville, Brewton, Monroeville, Tallassee, Belle Mina, and Shorter were harvested by a mechanical spindle picker. Tests at Headland 1 Professor and Technical Assistant, Department of Agronomy and Soils 1 and Crossville were harvested by hand. Average yield of seed cotton was determined for each variety at each location. Lint Percentage A sample of seed cotton from each variety at each location was taken at harvest and ginned on a 10-saw gin. Lint percentage was calculated by dividing weight of lint by weight of seed cotton. Lint percentage may be higher than that obtained at commercial gins because the 10-saw gin has no cleaning equipment. Yield of Lint Lint yield was determined by multiplying the lint percentage by yield of seed cotton. Fiber Properties Fiber qualities of all varieties from selected locations were deter- mined by Starlab, a commercial fiber testing laboratory in Knoxville, Tennessee. Span Length. This is the fiber length measured with the digital fibrograph. The 2.5 percent length is the average length of the longest 2.5 percent of the fibers and the 50 percent length is the average length of 50 percent of the fibers. Their ratio is an expression of the fiber length uniformity. The 2.5 percent length is about the same as the classer's staple. Stelometer. T 1 is a measure of breaking strength of a standard fiber bundle with the holding jaws separated by 1/8 inch. This is a measurement similar to Pressley strength except the figures are in grams per tex. Tex is a size measurement of the fiber bundle. The larger the T 1 , the stronger the fibers. E 1 measures the percentage stretch before the fibers break. Micronaire. This measures the fineness and maturity of the cotton fibers. The smaller the micronaire reading, the finer and/or more immature the fibers. The desirable range of micronaire is 3.5 to 4.9. Earliness Where more than one harvest was made, earliness is reported as the percentage of the total yield harvested at the first picking. Fusarium wilt Reaction of varieties to Fusarium oxysporum f. vasinfectum (fusarium wilt) was evaluated at the Plant Breeding Unit, Tallassee. The varieties were grown in a field with a high natural incidence of the fusarium wilt-root-knot nematode complex. Severity of the disease varies from year to year and also within the experimental area in the same year. Therefore, several years' data are necessary to realistically characterize a variety's wilt reaction. Stoneville 213 and Stoneville 825 have consistently shown a high incidence of wilt. All other reported varieties that have been tested for at least 3 years have acceptable tolerance to fusarium wilt. NEW AND EXPERIMENTAL VARIETIES Deltapine 90 was developed for the San Joaquin Valley of California. However, 3 years' testing indicates it is a high yielding, high quality, smoothleaf variety with broad adaptation. Deltapine 50 has been previously tested as D.P. 7537-6150, D.P. 6150, and Deltapine 50. It is a high-yielding, smoothleaf variety with wide adaptation. Coker 208 is similar to Coker 201 and Carolina Queen, reliable favorites in Alabama that have been discontinued. Acala SJ-5 and Lockett 77 are varieties adapted to the Western United States and are included in certain Alabama variety tests as national standard varieties. Deltapine NSL is a recently 3 released, smoothleaf variety that is nectariless. This is the first year for it to be tested in Alabama. DES 422 is a new variety developed at the Delta Branch Agricultural Experiment Station, Stoneville, Mississippi. It is related to DES 56 and appears to be a high yielding, well adapted, moderately early variety. Deltapine 102, Deltapine 733, and Stoneville 1181 are advanced experimental lines whose release is anticipated for 1985 or 1986. PD 4548 is an experimental line from the Pee Dee Experiment Station, Florence, South Carolina. STATISTICAL ANALYSIS Appropriate analyses of the yield data were made. For each location, the variability in the test was measured and expressed as a percentage of the test mean, i.e., the coefficient of variation (C.V.). An indication of the magnitude of difference between variety averages necessary to be considered a real difference is given for each location, designated. Least Significant Difference (L.S.D..05 * LOCATIONS OF EXPERIMENTS Tennessee Valley Substation, Belle Mina - W. B. Webster, Superintendent Sand Mountain Substation, Crossville - J. T. Eason, Superintendent Upper Coastal Plain Substation, Winfield - R. A. Moore, Jr., Superintendent Prattville Experiment Field - D. P. Moore, Superintendent E. V. Smith Research Center, Shorter - J. R. Akridge, Superintendent Plant Breeding Unit, Tallassee - L. L. Walker, Superintendent Brewton Experiment Field - J. A. Pitts, Superintendent Monroeville Experiment Field - J. A. Pitts, Superintendent Wiregrass Substation, Headland - J. G. Starling, Superintendent 4 Table 1. Performance of Cotton Varieties at Belle Mina, Alabama, 1983 1983 Variety 12-yr. av. 3-yr. av. Lint/acre Lint Earliness lIint/acre lint/acre Lb. Pct. Pct. Lb. Lb. Stoneville 825 424 41 89 819 841 Stoneville 213 420 40 90 777 763 DES 422 415 41 90 - Deltapine 50 412 38 89 837 833 Stoneville 1181 397 37 92 - McNair 235 390 38 90 798 799 Deltapine 733 390 39 89 - Deltapine 102 390 39 91 - Deltapine NSL 380 39 89 - - McNair 220 371 39 92 761 774 Deltapine 90 353 38 86 794 787 Coker 310 348 39 89 75,9 756 Coker 208 338 39 88 788 750 Stoneville 506 338 37 91 770 775 Coker 304 337 38 86 754 739 PD 4548 335 40 86 728 - Coker 3131 330 41 90 786 788 Deltapine 41 324 42 88 730 717 Coker 315 323 39 87 788 760 Delcot 311 317 39 89 797 762 Deltapine 61 310 39 81 673 692 Lockett 77 293 38 84 616 - Acala SJ-5 291 39 83 326 Test mean 358 L.S.D. (.05) 56 C.V. 11% 1 Percent harvested on first picking. Table 2. Performance of Cotton Varieties at Crossville, Alabama, 1983 1983 2-yr. av. 3-yr. av. Variety Lint/acre Lint lint/acre lint/acre Lb. Pct. Lb. Lb. Coker 3131 574 45 760 873 McNair 220 534 40 719 803 Delcot 311 516 39 775 862 McNair 235 498 41 750 819 Stoneville 506 486 41 650 690 Deltapine 50 476 41 715 819 Deltapine 102 466 40 - - DES 422 464 43 Deltapine NSL 455 42 - - Stoneville 825 422 42 597 627 Coker 310 416 41 704 753 Deltapine 90 415 42 698 759 Coker 208 410 43 665 734 Stoneville 213 406 42 634 611 Stoneville 1181 382 38 - - Coker 304 375 43 555 671 Coker 315 362 44 617 666 Deltapine 733 358 41 - - Deltapine 61 342 39 569 630 Deltapine 41 336 44 665 690 Test mean 434 L.S.D. (.05) 99 C.V. 16% Table 3. Performance of Cotton Varieties at Prattville, Alabama, 1983 Variety Deltapine 90 DES 422 Deltapine 41 Deltapine 102 Stoneville 1181 Deltapine 50 Stoneville 825 McNair 235 Stoneville 506 McNair 220 Coker 208 Deltapine 733 Delcot 311 Deltapine 61 Coker 310 Stoneville 213 Deltapine NSL Coker 3131 Coker 315 Coker 304 Test mean L.S.D. (.05) C.V. Lint/acre Lb. 1,050 1,043 1,027 970 961 959 945 941 935 933 929 918 909 906 901 894 861 850 842 749 mommmommu-M 926 102 8% 'Percent harvested on first picking. 1983 Lint Pct. 40 43 44 40 40 39 42 44 40 42 41 39 42 40 42 41 41 44 44 42 1 Earliness Pct. 87 86 85 86 83 86 85 77 90 85 86 85 86 85 85 85 85 84 80 81 2-yr. av. lint/acre Lb. 1,101 - 1,130 1,043 989 1,051 976 1,013 1,027 966 992 1,016 1,074 1,008 1,000 908 3-yr. av. li i nt/acre Lb. 1,013 1,030 971 933 958 910 909 909 920 903 899 973 926 897 819 ~Vr\~l Table 4. Performance of Cotton Varieties at Tallassee, Alabama, 1983 1983 Variety 12-yr. ayv. 3-yr. av. Lint/acre Lint Earliness lint/acre lint/acre Lb. Pct. Pct. Lb. Lb. Deltapine 733 1,338 42 93 - - Deltapine 41 1,332 45 93 1,235 1,132 McNair 235 1,290 41 95 1,219 1,182 Coker 208 1,262 41 96 1,216 1,135 Coker 315 1,252 43 94 1,113 1,088 Deltapine NSL 1,242 42 95 - - Deltapine 61 1,229 41 94 1,147 1,097 McNair 220 1,203 41 94 1,166 1,151 Deltapine 50 1,200 39 95 1,092 1,067 Coker 310 1,196 41 94 1,233 1,141 Deltapine 90 1,194 42 94 1,117 1,124 Coker 304 1,186 40 94 1,081 1,020 Stoneville 1181 1,155 40 93 - - Deltapine 102 1,142 42 96 - - Stoneville 825 1,135 40 93 1,092 1,051 Stoneville 213 1,129 42 95 1,137 1,109 DES 422 1,102 41 95 - - Stoneville 506 1,098 39 95 985 944 Delcot 311 1,060 39 96 1,005 964 Coker 3131 1,043 41 93 1,066 1,062 Test mean 1189 L.S.D. (.05) 170 C.V. 10% Percent harvested on first picking. Table 5. Performance of Cotton Varieties at Shorter, Alabama, 1983 1 2 Variety Lint/acre 1983 2-yr. av. 3-yr. av. Lint/acreLint lint/acre lint/acre Lb. Pct. Lb. Lb. DES 422 669 41 - Deltapine 90 622 40 586 Deltapine 61 601 40 509 398 Deltapine 50 601 39 526 - Stoneville 213 584 40 500 399 Coker 3131 564 42 492 401 Stoneville 825 560 40 487 411 McNair 235 542 39 519 419 McNair 220 519 38 508 412 Delcot 311 519 39 486 394 Deltapine NSL 516 40 458 Stoneville 506 497 38 444 347 Coker 310 494 38 484 372 Stoneville 1181 484 38 - - Deltapine 733 472 38-w Coker 304 469 38 450 356 PD 4548 468 40 433 Deltapine 102 448 39 - Lockett 77 447 38 447 Coker 315 442 38 467 365 Coker 208 411 39 452 Deltapine 41 409 42 409 338 Acala SJ-5 285 39 292 224 Test mean 505 L.S.D. (.05) 138 C.V. 19% 1 1981 and 1983 data. 2 1980, 1981, and 1983 data. Table 6. Performance of Cotton Varieties at Monroeville, Alabama, 1983 1983 Variety 19831 1-yr. av. 3-yr. av. Lint/acre Lint Earliness lint/acre lint/acre Lb. Pct. Pct. Lb. Lb. Deltapine 90 968 43 87 950 987 Deltapine 102 921 41 88 - - McNair 235 875 42 89 915 919 Stoneville 1181 871 41 88 - - Coker 208 818 42 84 829 894 Deltapine 50 807 41 85 890 913 Deltapine 41 802 44 85 866 906 Deltapine NSL 801 40 89 - - DES 422 798 42 88 - - Stoneville 213 795 43 85 823 819 Coker 310 793 42 87 846 874 Coker 3131 780 44 80 813 845 Stoneville 825 762 42 89 913 890 Coker 315 752 43 83 770 840 Stoneville 506 738 40 88 798 837 Coker 304 731 40 83 801 826 Deltapine 733 713 39 84 - - Deltapine 61 701 41 85 811 827 McNair 220 691 41 91 808 858 Delcot 311 686 40 90 798 808 Test mean 790 L.S.D. (.05) 121 C.V. 11% 1 Percent harvested on first picking. 10 Table 7,., Performance of Cotton Varieties at Brewton, Alabama, 1983 Va ri*ety McNair 235, Stoneville 1181 Coker 310 Deltapine 90 Coker 315 DES. 4 22 McN a ir 220 Stoneville 825 Deltapine 50 Deltapine 733 Stoneville 213* Deltapine NSL Stoneville 506 Coker 208 Deltapine'102 Delcot 311 Coker 304 Del-tapine 41 Deltapine-61 Coker 3131 Test mean L.S.D. (005) cOV*. n n~inrd 901 185 14% 1 Percent harvested on first-picking. 11 0 mw Lint/acre Lb. 1,029 1,019 993 989 988 988. 980 964 955 938 923 885 860 853 846 844 828 775 717 649 1983 Lint Pct. 40 37 39 39 40 39 39 39 38 37 40 39 38 39 39 38 39 41 39 40 Earliness 1 Pct. 92 89 90 86 89 90 93 90 8 9 89 87 91 93 89 93 90 91 90 86 88 2-yr. av. Si nt/acre Lb. 901 877 934 915 922 899 873 887 890 866 802 848 799 8,09 709 3-yr. av. Si nt/acre Lb.* 916 964 992 984 946 958 903 905 896 890 812 878 886 856 801 I Table 8. Performance of Cotton Varieties at Headland, Alabama, 1983 1983 2-yr. av. 3-yr. av. Variety 'Lint/acre Lint lint/acre lint/acre Lb. Pct. Lb. Lb. Stoneville 1181 794 39 - - Stoneville 213 772 40 1,001 1,049 Delcot 311 737 38 961 1,033 Deltapine 41 718 42 1,072 1,115 Coker 304 716 39 981 1,061 Deltapine 733 715 39 - - Coker 315 700 40 1,021 1,076 Coker 208 695 39 944 1,043 Coker 3131 692 42 922 1,043 Coker 310 687 38 1,064 1,059 Deltapine 50 675 38 936 994 Deltapine 90 674 39 934 1,049 Deltapine NSL 638 39 - - DES 422 637 39 - - Stoneville 825 629 39 983 1,050 McNair 220 621 39 975 1,092 Stoneville 506 609 39 890 967 Deltapine 61 570 37 830 931 Deltapine 102 570 37 - - McNair 235 553 40 979 1,059 Test mean 670 L.S.D. (.05) 187 C.V. 20% 12 Table 9. Performance of Cotton Varie ties in Alabama, Average of All Locations Variety Deltapine 90 McNair .235 McNair 220 Deltapine 50 Deltapine 41 Coker 310 Coker 208 Stoneville 825 Coker.3131 Coker 315 Stoneville 213 Delcot 311 S toneville 506 Coker 304 Deltapine 61 DES 422 Stoneville 1181 Deltapine 733 Deltapine NSL Deltapine 102 Yield, lint/acre 1983. 1982-83 1981-83 Lb. Lb. -Lb. 783 765 732 761 715 728 715 730 685 708 740 698 695 674 672 765 758 730 722 719 933 945 909 912 928 928 905 899 866 889 905 872 851 847 833 959 950 933 929 925 921 908 907, 905 901 890 880 86 0 859 848 1983 40 41 40 39 43 40 40 41 42 41 41 39 39 40 39 41 39 39 40 Lint 40 41 40 39 43 40 40 40 42 41 41 39 39 40 40 1981-83 40 41 40 39 43 40 40 40 42 41 40 39 39 40 39 -Earli1*ness 1982-83 80 86 86 82 82 82 84. 84 84 82 80 84 84. 82 79 These varieties at 2 locations only., PD 4548 401 40 41 86- Lockett 77 370 38 38 84- Acala Si-5 288 i39 38 .83743 1981-83 78 83 83 80 80 79 81 82 82 79 78 83 82 80 77 1983 Pct. 88 89 91 89 88 89 89 89 87 87 88 90 91 87 86 90 89 88 90 91 mi = a'. I.UIII Table 10. Percentage of Plants Showing Symptoms of Fusarium Wilt 1 Average wilt percentage Variety 2-yr. 3-yr. 4-yr. 5-yr. 6-yr. 7-yr. 8-yr. 11-yr. 1983 1982-83 1981-83 1980-83 1979-83 1978-83 1977-83 1976-83 1973-83 Pct. Pct. Pct. Pct. Pet. Pct. Pct. Pct. Pct. Stoneville 213 22.9 24.4 20.0 32.2 38.7 35.2 36.4 33.9 39.7 Coker 310 27.5 22.8 15.8 20.6 23.5 21.6 21.3 20.2 23.4 Coker 304 28.2 24.0 16.3 21.8 21.9 20.0 19.7 18.2 21.5 Deltapine 61 14.0 18.2 14.5 18.4 20.1 17.7 17.3 17.4 McNair 220 18.4 21.1 13.0 18.9 18.0 16.1 16.2 14.8 Coker 315 27.4 22.9 16.8 23.7 24.1 21.4 22.1 Deltapine 41 9.2 13.9 12.5 22.5 23.2 20.5 McNair 235 9.0 13.5 10.4 14.0 14.6 13.3 Stoneville 825 30.6 34.0 27.5 41.3 43.2 Coker 3131 18.3 19.7 17.0 21.8 Delcot 311 10.9 10.1 7.1 11.7 Stoneville 506 13.0 12.3 9.8 15.8 Coker 208 24.6 23.7 16.5 Deltapine 90 9.4 10.2 10.1 Deltapine 50 15.3 13.7 Deltapine NSL 17.2 DES 422 15.1 Stoneville 1181 31.2 Deltapine 733 44.2 Deltapine 102 36.0 I Data were taken from a field severely infested with the fusarium wilt fungus and root-knot nematodes, Plant Breeding Unit, Tallassee, Alabama. tt Table 11. Fiber Properties of Cotton Varieties at Crossville, Alabama, 1983 Fibrograph Uniformity Stelometer Variety Micronaire 50% 2.5% ratio Ti El icron.i. Reading In. In. Pct. /tex Pct. Coker 208 4.6 . 0.49 0.97 51 20.6 Coker 304 4.8 .53 1.07 50 19.3 Coker 310 4.6 .56 1.13 50 20.9 Coker 315 4.4 .52 1.08 48 21.2 Coker 3131 4.9 .52 1.02 51 18.0 Delcot 311 4,5 .52 1.04 50 22.3 DES 422 4.7 .48 1.02 47 19.6 Deltapine 41 4.2 .50 1.00 50 20.8 Deltapine 61 4.8 .55 1.11 50 24.8 Deltapine 90 5.0 .52 1.07 49 25.4 Deltapine 102 4.6 .52 . 1.06 49 20.7 an Deltapine 50 5.1 .50 1.04 48 19.8 Deltapine 733 4.8 .54 1.10 49 21.0 Deltapine NSL 5.0 .52 1.04 50 19.5 McNair 220 4.8 .50 1.04 48 20.8 McNair 235 4.8 .52 1.10 47 19.2 Stoneville 213 5.0 .50 1.02 49 17.9 Stoneville 506 4.4 .52 1.10 47 21.6 Stoneville 825 4.8 .54 1.10 49 20.7 Stoneville 1181 5.0 .58 1.16 50 22.0 7.5 7.5 7.5 B.0 9.0 B.5 B.0 3.0 9,0 B.0 3.5B. 5 9.5 1.5 B.5 7.0 7.0 3.5 3.0 7.0 7.0 Table 12. Fiber Properties of Cotton Varieties at Prattville, Alabama, 1983 Fibrograph Uniformity Stelometer Variety Micronaire 50% 2.5% ratio Ti El Coker 208 Coker 304 Coker 310 Coker 315 Coker 3131 Delcot 311 DES 422 Deltapine Deltapine Deltapine Deltapine Deltapine Deltapine Deltapine I McNair 220 McNair 235 Stoneville Stoneville Stoneville Stonevi l le 41 61 90 102 50 733 NSL 5.0 5.2 4.8 5.0 4.4 4.1 4.2 4.9 5.0 4.4 4.2 4.4 4.6 5.2 4.3 4.5 4.7 4.4 5.1 4.8 213 506 825 1181 In. 0.54 .57 .58 .54 .54 .57 .56 .56 .53 .56 .58 .54 .58 .58 .56 .54 .58 .54 .52 .54 In. 1.10 1.18 1.16 1.12 1.10 1.10 1.13 1.13 1.04 1.11 1.13 1.14 1.16 1.12 1.14 1.12 1.13 1.12 1.06 1.12 Pet. 50 48 50 48 49 52 50 50 51 50 51 47 50 52 49 48 51 48 49 48 /texct. 21.2 22.0 22.5 20.6 19.2 23.3 19.5 20.8 22.2 22.5 19.8 17.5 22.0 21.1 22.8 21.8 19.7 20.8 19.2 21.2 7.0 7.0 6.5 8.0 8.5 9..0 8.5 8.0 9.0 7.5 8.5 9.5 7.0 9.5 7.0 6.5 8.0 8.0 7.0 7.0 _ Rea'ding Table 13. Fiber Properties of Cotton Varieties at Headland, Alabama, 1983 Fibrograph Uniformity Stelometer Variety Micronaire 50% 2.5% ratio Ti El In , In. Pct. Pct. Coker 208 4.9 0,48 1.04 46 22.6 5 Coker 304 5.0 .54 1.12 48 ' 24.1 6 Coker 310 4,8 .56 1.20 47 27.4 6 Coker 315 4.8 .56 1.18 47 23.0 7 Coker 3131 4,6 .53 1.09 49 22.4 7 Delcot 311 4.4 .56 1.14 49 25.3 7 DES 422 4e9 .54 1.12 48 23.3 7 Deltapine 41 4.9 .53 1.09 49 25.1 7 Deltapine 61 5.2 .52 1,14 46 24.1 7 Deltapine 90 5.4 .54 1.11 49 25.3 7 Deltapine 102 4.8 .52 1.10 47 22.8 9 Deltapine 50 5.0 .52 1.10 47 20.1 8 Deltapine 733 5.0 .53 1.14 46 24.7 6 Deltapine NSL 4.9 .54 1.10 49 22.9 7 McNair 220 5.0 .50 1.08 46 24.3 5 McNair 235 5.1 .51 1.06 48 22.7 7 Stoneville 213 5.2 .52 1.08 48 19.1 8 Stoneville 506 4.6 .52 1.12 46 22.1 7 Stoneville 825 5.2 .54 1.14 47 23.3 6 Stoneville 1181 5.2 .53 1.13 47 24.7 6 .5 .0 .5 .5 .5 .5 .5 .0 .5 .5 .0 .0 .5 .5 .5 .0 .0 .5 .0 .5 Reain gltex Table 14. Sources of Seed for the 1983 Cotton Variety Tests Source Delta and Pine Land Co. Scott, Mississippi Stoneville 213 Stoneville 825 Stoneville 506 Stoneville 1181 Coker Coker Coker Coker Coker Stoneville Pedigreed Seed Co. Stoneville, Mississippi Coker's Pedigreed Seed Co. Hartsville, South Carolina 310 304 315 3131 208 Delcot 311 Delta Center Portageville, Missouri Northrup King Co. Leland, Mississippi McNair 235 McNair 220 DES 422 Delta Branch Experiment Station Stoneville, Mississippi 18 Variety Deltapine Deltapine Del tapi ne Del tapi ne Deltapine Del tapi ne Deltapine NSL 61 41 102 90 50 733 1 0%0O 0M 0 004 *O MM* nwa a m mm l WMW wo t 04 W 6.4 Mf 0 MW W M 0G N *Nd a"a -wm w n= m 4 m o a aiamo QI WN MAGM 0 0 OA 0WS00 .WM4 0 cine? RECOMMENDED COTTON VARIETIES FOR ALABAMA The list of recommended varieties given below was prepared by a committee composed of the authors of this report and Dr. Louie J. Chapman, Head of Extension Agronomy, Alabama Cooperative Extension Service, based on variety test performance for at least 3 years. Varieties differ in perfor- mance at individual locations, so selection should be based largely on variety performance at a site that most nearly represents the grower's local situation. The recommended varieties are listed in order of 3-year average lint yield. Deltapine 90 McNair 235 McNair 220 Deltapine 50 Deltapine 41 Coker 310 Coker 208 Stoneville 8251 Coker 3131 Coker 315 Stoneville 2131 Delcot 311 Stoneville 506 Coker 304 Deltapine 61 1 Not suited for soils where fusarium wilt has been a problem. 19