lu ts I* * S AGRICULTURAL EXPERIMENT STATION / AUBURN UNIVERSITY R. Dennis Rouse, Director Auburn, Alabama 1973 ALABAMA COTTON VARIETY REPORT- A Report of the Performance of Cotton Varieties Tested at Nine Locations in Alabama During 1973 2/ Wiley C. Johnson- The Alabama Cotton Variety Test is a continuing evaluation of available cotton varieties from both private companies and state experiment stations. Breeding lines that are likely to be released as varieties are also tested. All tests are conducted on units of the Agricultural Experiment Station by Experiment Station personnel. All phases of culture are as generally recom- mended by the Experiment Station to farmers. Every effort is made to test the varieties and present the data in an unbiased manner. Experimental Design A randomized block design in four replications was used at each of nine locations. Length of plots at different locations varied from 40 to 138 feet. All plots were single-row except at Prattville and Auburn where 2-row plots were used. Seasonal Conditions for the Tests In general, early weather conditions were adequate for successful establishment and stands were established within the optimum time period. However at the Sand Mountain Substation, Crossville, Alabama, unusually cold, wet, and windy conditions necessitated replanting and caused irregular stands and erratic early growth. Rainfall was near normal through midseason. Some locations experienced drougth during the latter part of the season. Cotton -February 1974 -Professor, Department of Agronomy and Soils, Auburn University was extremely late fruiting in northern Alabama and numerous plants had ab- normal growth. This atypical growth and fruiting was probably caused by late planting and damage from an unusually high population of tarnished plant bugs. Ideal weather during August and September allowed this late crop to mature. Explanation of Data Yield of Seed Cotton: Tests at Prattville, Tallassee, Belle Mina, Crossville, Brewton, Monroeville, and Auburn were harvested by a mechanical spindle picker. The tests at Winfield and Headland were harvested by hand. Average weight of seed cotton per acre was determined for each variety at each location. Lint Percentage: A sample of seed cotton of each variety from each location was taken at harvest and ginned on a 10-saw gin. Lint percentage was calcu- lated by dividing weight of lint by weight of seed cotton. Yield of Lint: Lint yield was determined by multiplying the lint percentage by yield of seed cotton. Field Losses: Following machine harvest of the tests at Auburn and Prattville, the cotton fallen on the ground was picked up, dried, cleaned of soil, and weighed. Lint losses were calculated and given both as pounds per acre and as a percentage of total yield for each variety. The losses at Auburn were excessive because of rain and high winds just before harvest. Fiber Properties: Measurements of fiber properties are not available at this time. A supplement to this report will be made when this information is available. Fusarium Wilt: Reaction of varieties to Fusarium wilt is evaluated at the Plant Breeding Unit, Tallassee by growing the varieties in fields with a high natural incidence of Fusarium wilt. Results of such tests vary from year to year and also from different areas of the field in the same year. Therefore, it is necessary to have several year's data to realistically characterize a variety's wilt reaction. Data are summarized in Table 8. Auburn 56 is the only variety that has been highly resistant every year tested. Several other varieties appear to have resistance but are either inconsistent in response or have been tested for a relatively short period. These are McNair 511, Deltapine 25, Delcott 277, Rex Smoothleaf 66, Stoneville 603, and Coker 310. Stoneville 213 and Hancock have consistently shown a large amount of wilt symptoms and damage. Hancock was omitted in 1972 and could not be averaged, but in 1973 and years prior to 1972 it was extremely susceptible. All other varieties that have been tested for at least 3 years have a degree of tolerance to Fusarium wilt. Judgment of resistance should not be made on a single year's data. New and Experimental Varieties Acala 1517-70 and Lockett 4789A are commercial varieties adapted to California and the Southwest, respectively. They are not suitable for growth in Alabama and were included in some of our tests as national standard varie- ties. Coker 312 is a new release that was developed for use in the Texas high plains area. Dixie King III is in its second year of release and was pre- viously tested at Dixie King 375. It has replaced Dixie King II. McNair 612 has just been released. Seed will not generally be available until 1975. Promising experimental strains tested but not released include Coker 220, Coker 8304, Deltapine 652, Deltapine 5916-65, A6-668-BE, A6-741-ADE, and McNair 71418. 4 Acknowledgement I wish to express my appreciation to Dr. A. J. Kappelman, Jr., for Fusarium wilt ratings, to superintendents J. K. Boseck, S. E. Gissendanner (retired), Robert Moore, J. G. Starling, F. T. Glaze, Emmett Carden, and J. W. Langford for growing and harvesting the variety tests, and to Research Data Analysis for assistance in summarizing the data. Table 1. Performance of Cotton Varieties in Northern Alabama, 1973 Yield of lint per acre Lint percentage Belle Cross- Win- Belle Cross- Win- Variety Mina ville field Av. Mina ville field Av. Lb. Lb. Lb. Lb. Pct, Pct. Pct. Pct. Stoneville 603 902 456 615 658 42 41 41 41 Hancock 708 507 582 599 45 43 42 43 Delcott 277 799 379 489 556 44 41 42 42 Dixie King III 709 515 435 553 44 43 42 43 Auburn 56 630 447 550 542 42 40 40 41 Stoneville 213 812 339 474 542 43 42 42 42 Coker 220 749 391 480 540 46 42 44 44 Coker 8304 656 426 517 533 48 44 45 46 Deltapine 652 689 305 560 518 46 44 45 45 McNair 0612 626 434 486 515 48 44 45 46 Deltapine 16 702 357 440 500 44 43 42 43 Coker 310 701 403 352 485 47 43 45 45 Deltapine 25 680 335 421 478 44 43 43 43 Coker 201 610 383 385 459 46 44 44 45 McNair 210 544 387 436 456 41 40 40 40 Coker 417 534 468 297 433 43 42 42 42 Deltapine 45A 642 266 370 426 44 42 42 42 Hy-Bee 100A 578 356 277 404 43 43 42 43 McNair 511 431 325 311 355 43 39 42 41 Lockett 4789-A 371 323 256 317 42 39 41 41 (Following varieties were not tested at all locations) A6-668-BE 557 46 A6-741-ADE 336 44 Acala 1517-70 255 39 Coker 312 445 43 DPL 5916-65 373 44 Hy-Bee 200A 327 328 42 42 Rex Smoothleaf 66 370 339 41 41 Table 2. Performance of Cotton Varieties in Northern Alabama, Two-year Average, 1972-1973 Yield of lint per acre Lint percentage Belle Cross- Win- Belle Cross- Win- Variety Mina ville field Av. Mina yule field Av. Lb. Lb. Lb, Lb. Pct. Pot. Pct. Pot. Hancock 1,001 517 740 753 44 44 44 44 Stoneville 603 1,024 429 720 724 41 41 42 41 Stoneville 213 1,015 391 708 705 42 43 43 43 Delcott 277 993 390 687 690 43 42 43 42 Deltapine 652 967 358 735 687 45 45 46 45 Deltapine 16 957 386 629 657 44 43 43 43 Deltapine 25 912 415 625 651 43 45 45 44 Coker 310 982 385 564 643 45 44 44 44 Auburn 56 810 445 653 636 41 40 40 40 Coker 201 846 401 642 630 45 44 44 44 Hy-Bee 100A 896 441 542 627 41 44 43 43 Deltapine 45A 912 392 569 624 43 43 42 43 Coker 417 866 423 549 613 43 42 42 42 McNair 210 761 413 607 594 40 40 40 40 McNair 511 677 415 552 548 43 40 42 42 Lockett 4789-A 566 293 504 454 41 39 42 41 (Following varieties were not tested at all locations) McNair 0612 863 46 Acala 1517-70 240 39 Dixie King III 513 666 43 42 Hy-Bee 200A 446 676 43 43 Rex Smoothleaf 66 406 616 42 42 Table 3. Performance of Cotton Varieties in Northern Alabama Three-year Average, 197 1-1972-1973 Yield of lint per acre Lint percentage Belle Cross- Win- Belle Cross- Win- Variety Mina ville field Av. Mina ville field Av. Lb-. Lb Lb. Lb. Pct. Pct. Pct. Pct, Hancock 1,141 674 941 919 43 43 43 43 Stoneville 213 1,171 603 924 900 42 42 43 42 Stoneville 603 1,145 650 881 892 41 41 41 41 Hy-Bee 100A 1,100 654 823 859 42 43 42 43 Coker 310 1,138 618 784 847 45 44 44 44 Coker 201 1,057 612 869 846 44 43 44 44 Deltapine 25 1,105 593 837 845 44 44 44 Deltapine 16 1,091 593 785 823 43 42 42 42 Coker 417 1,093 628 734 818 42 42 42 42 Deltapine 45A 1,080 569 787 812 43 42 42 42 Delcott 277 928 573 852 784 42 41 42 42 Auburn 56 934 641 764 780 41 40 40 40 McNair 511 940 663 734 779 43 40 41 41 McNair 210 907 610 749 755 40 40 39 40 (Following varieties were not tested at all locations) Lockett 4789-A 758 40 Hy-Bee 200A 661 811 43 42 Rex Smoothleaf 66 602 818 42 42 Table 4. Performance of Cotton Varieties in Southern Alabama, 1973 Yield of lint per acre in percentage Au- Brew- Head- Monroe- Pratt- Tallas- Au- Brew- Head- variety burn ton land ville ville see Av. burn ton land Lb. Lb. Lb. Lb. Lb. Lb. Lb. Pot. Pot. Pot. Pt o. Pt Las- Av, Pot. Deltapine 25 Hy-Bee 100A McNair 511 Hy-Bee 200A Stoneville 603 Hancock Auburn 56 Deltapine 652 Stoneville 213 McNair 0612 Coker 201 Deltapine 16 Deltapine 45A Coker 310 Dixie King III Coker 8304 Coker 220 McNair 210 Delcott 277 Coker 417 Rex Smooth- leaf 66 Lockett 4789-A Deltapine 5916- 65 McNair 71418 Coker 312 A6-741-E A6-668 -BE Acala 1517-70 827 7 67 679 783 787 728 6 97 805 852 714 689 775 699 673 666 703 634 541 583 632 851 820 1, 014 789 707 878 913 766 7 67 7 797 898 12 716 738 889 839 876 833 729 703 871 786 631 68 2 681 685 739 696 616 663 776 713 619 751 661 644 727 749 7 04 569 596 857 885 858 890 869 867 832 926 794 847 898 868 826 871 745 881 769 997 963 775 644 735 558 806 569 845 596 749 869 868 771 837 796 863 776 837 857 787 809 755 784 774 858 709 793 727 758 800 665 555 855 1, 051 981 969 985 749 895 855 867 762 655 916 836 766 851 696 795 767 880 686 701 498 (Following varieties were 773 754 727 334 665 540 841 837 831 825 805 804 802 801 800 780 777 775 772 772 767 765 762 744 743 727 685 635 not 46 43 42 45 41 44 41 46 44 45 44 44 44 43 44 44 44 39 41 42 42 42 tested 43 42 41 42 42 43 40 45 42 45 44 43 43 45 42 45 44 41 42 43 39 39 at all 44 43 44 40 734 701 43 41 41 40 41 39 39 42 41 41 39 39 41 39 38 42 42 39 41 40 39 40 locations) 42 39 42 40 39 40 39 40 38 42 39 44 43 42 38 42 40 43 40 48 41 40 37 37 46 43. 42 42 41 43 40 46 43 44 44 43 43 44 43 42 42 39 42 43 42 40 45 44 42 43 43 44 41 46 43 46 44 43 44 44 43 44 43 41 42 42 42 40 44 42 41 42 41 42 40 45 42 44 43 42 42 43 42 43 42 41 42 41 40 40 42 45 v~v r~ r y~ ~Y VY L L L1 Table 5. Performance of Cotton Varieties in Southern Alabama, Two-year Average, 1972-1973 Yield of lint per acreLitpreag Au- Brew- Head- Monroe- Pratt- Tallas- Au- Brew- Head- More Pat- Tl Variety burn ton land ville yulle see Av. burn ton land vl il e Lb. Lb. Lb. Lb. Lb. Lb. Lb. . Pct. P ot. P otcPttPt Last' Av. 0 Pct, Hy-Bee 200A My-Bee lO0A Deltapine 25 Stoneville 213 McNair 511 Hancock Auburn 56 Delcott 277 Coker 201 Deltapine 16 Stoneville 603 Coker 310 Deltapine 652 Deltapine 45A Coker 417 Rex Smooth_- .. leaf 66 McNair 210 MoNair 0612 A6-688-BB Lockett 4789-A Acala 1517-70 Dixie King. III 633 616 635 678 585 634 584 581 64 628 644 624 641 573 561 8921 8 67 961 829 982 810 912 868 942 740 742 823 789 815 878 783 735 739 763 663 823 786 773 762 742 795 739 764 712 737 807 778 754 7 62 698 776 717 765 764 712 715 746 746 695 690 614 796 746 698 525 713 765 737 961 946 929 905 87 0 890 812 799 836 870 824 802 857 863 842 727 760 927 960 880 867 958 798 877 890 761 905 866 840 738 873 7168 738 722 834 817- 816 801 793 789 781 779 778 766 764 762 756 755 746 720 704 42 41 44 42 40 43 38 40 42. 42 39 42 44 41 40 40 38 42 42 45 40 41 43 40 42 44 42 42 44 45 43 41 40 40 40 39 42 40 39 39 38 40 40 39 40 40 42 40 39 38 39 (Following varieties were not tested at all locations) 809 797 737 505 270 587 669 616 44 40 40 39 38 702 934 841 41 40 41 43 41 40 42 39 40 43 42 40 43 42 40 41 39 45 43 39 43 43 45 43 42 43 40 41 43 42 41 44 45 43 42 40 39 42 42 45 42 41 43 40 41 44 42 42 44 40 43 42 40 39 41 43 42 42 42 44, 42 41 42 39 41 42 41 40 42 43 42 41 40 40 --- -e -- -1, vrr r rrv I vv r. r Table 6. Performance of Cotton Varieties in Southern Alabama, Three-year Averae Yield of lint per acre Lint pe Brew- Head- Monroe- Pratt- Brew- Hea Variety Auburn ton land ville ville Ave Auburn ton lan Lb. Lb. Lb. Lb. Lb. Lb. P ct . Pct. Pct Hy-Bee 200A 677 1,059 661 785 1,064 849 41 42 39 Deltapine 25 711 1,102 606 772 1,027 844 43 44 40 Hy-Bee 100A 636 1,089 593 770 1,057 829 41 43 38 Coker 201 666 1,089 658 799 931 829 42 43 38 McNair 511 639 1,151 540 788 982 820 39 40 38 Stoneville 213 730 987 600 750 985 810 42 41 34 Coker 417 615 1,050 641 750 963 804 40 42 38 Coker 310 660 1,016 599 776 954 801 42 44 38 Deltapine 16 725 916 625 746 951 793 41 41 38 412 Hancock 681 887 656 779 948 790 42 43 38 4 34 Deltapine 45A 648 999 593 749 952 788 40 43 39 413 Stoneville 603 663 874 702 764 913 783 39 42 39 401 Delcott 277 611 1,020 619 773 863 777 39 42 39 402 Auburn 56 627 1,001 667 690 893 776 38 40 37 3 03 McNair 210 570 864 646 719 851 730 38 39 38 439 Rex Smoothleaf 66 636 848 624 664 777 710 39 40 37 394 (Following variety was not tested at all locations) T'. L 3 L 2 0 2 L 2 L 0 D 9 Lockett~~ 479A593 Lockett 4789-A 539 73 Table 7. Field Losses of Cotton Varieties, 1973 AU PRATTVILLE Ground Harvested Pct. Ground Harvested Pct. Left on Variety loss yield loss loss yield loss plant Lb./A. Lb./A. Pct. Lb./A. Lb./A. Pct. Lb./An Auburn 56 86 697 11 41 776 5 22 Coker 201 134 688 16 46 809 5 22 Coker 220 64 634 9 40 793 5 19 Coker 310 121 673 15 42 774 5 26 Coker 417 ll 632 15 43 800 5 20 Coker 8304 92 703 12 50 708 7 23 Delcott 277 115 583 16 71 758 9 32 Deltapine 16 88 774 10 42 755 5 23 Deltapine 25 52 827 6 45 869 5 20 Deltapine 45A 97 699 12 40 784 5 22 Deltapine 652 .57 805 7 54 837 6 24 Hancock 161 728 18 59 863 6 25 Hy-Bee LOA 63 767 8 41 868 4 31 Hy-Bee 200A 84 783 10 38 837 4 30 Lockett 4789-A 75 569 12 58 555 9 69 McNair 210 143 541 21 34 727 4 25 McNair 511 110 678 14 28 771 4 19 McNair 0612 126 714 15 40 787 5 37 Rex Smoothleaf 66 98 644 13 56 665 8 30 Dixie King III 104 666 13 39 858 4 16 Stoneville 213 68 852 7 46 857 5 16 Stoneville 603 100 786 11 50 796 6 23 (Following varieties were not tested at both locations) ~Coker 312 81 727 10 Deltapine 5916.65 100 773 11 McNair 71418 45 754 6 Acala 1517--70 74 334 18 A6- 668-BE 53 701 7 32 A6-741--ADE 63 734 8 27 1 Picked November 30, 1973 2 Picked November 15, 1973 Table 8. Percentage of Plants Showing Symptoms of Fusarium Wilt 1 2-yr 3-yr 4-yr 5-yr 6-yr 7-yr 1 year av. av. av. av. av. av. Variety 1973 1972-73 1971-73 1970-73 1969-73 1968-73 1967-73 Auburn 56 29.5 19.6 19.1 25.8 22.1 21.2 18.3 Coker 201 4.2 10.2 24.1 36.3 36.7 42.3 39.8 Deltapine 16 16.7 21.3 33.4 46.1 43.0 41.1 37.9 Deltapine 45A 7.5 8.5 29.8 46.7 42.8 40.5 35.2 Rex Smoothleaf 66 26.5 23.7 31.4 32.3 28.6 32.4 28.8 Stoneville 213 76.2 53.8 53.2 63.6 68.0 72.9 68.4 Coker 310 46.7 28.3 42.4 31.8 27.5 Coker 417 36.2 33.1 38.4 41.2 43.6 Stoneville 603 16.8 18.6 28.9 31.3 28.3 Delcott 277 21.0 16.3 23.4 34.7 Deltapine 25 40.0 26.7 28.9 Hy-Bee 100A 31.0 32.9 54.0 Hy-Bee 200A 8.7 26.3 44.9 McNair 210 42.8 36.1 33.1 McNair 511 29.0 23.1 27.8 A6-741-AE 31.2 22.3 Coker 8304 30.8 28.6 Deltapine 652 33.7 25.3 Coker 220 46.5 Coker 312 40.0 Dixie King III 42.0 Hancock 84.0 Lockett 4789A 64.8 McNair 0612 52.5 McNair 71418 38.3 Data were taken from a field severely infested with the Fusarium wilt fungus and root-knot nematodes, Plant Breeding Unit, Tallassee, Alabama.