EVALUATION OF STRIPPER COTTON VARIETIES
Ralph Koopmann, Cooperator
Anthony Netardus, C.E.A., Author
DeWitt County, 1995, Precinct #3
SUMMARY:
13 varieties of cotton were compared in the DeWitt County variety trial in 1995. The highest
yielding variety was Sure-Grow SGS 404 which produced 895 pounds of lint per acre. The average
yield of all varieties was 816 pounds making this an exceptional year for cotton in DeWitt County.
The 1995 average yield was 256 pounds more than in 1994 and 481 pounds more than in 1993.
PURPOSE:
Variety trials are conducted around the state to determine adaptability and production potential in
each location. These 13 varieties are compared to presently used varieties to help producers
determine potential varieties that will help increase yields, thus increasing profit.
PROCEDURE:
Date planted: April 2, 1995
Date harvested: August 9, 1995
Fertilizer: 88 lbs. of N; 35 lbs. of P; 10 lbs. of K; 10 lbs. of S; and 2.5 lbs. of Zn
Herbicide: 3/4 pt. Command + 1 pt. Cotoran (19" Band)
Insecticide: 7 lbs. Thimet; 1/4 lb. Orthene; & 16 oz. Thiodan
Growth Regulator: 4 oz. of Pix
Previous Crop: Hay Grazer
Soil Type: Clay Loam
Varieties were planted in 3 row plots on 38" row spacing. Cotton was hand harvested.
RESULTS:
Although conditions were dry, there was enough moisture at the right times to produce a good cotton
crop in DeWitt County this year.
Sure-Grow SG 404 was the highest yielding variety producing 895 pounds of lint per acre. The
average of all 13 varieties was 816 pounds per acre. There was a difference in yield of 120 pounds
from top to bottom. At $.80 per pound this would show a difference of $96 per acre gross income.
CONCLUSION:
Varieties perform differently from location, soil type and conditions within a county and region or
part of the state. Variety selection is critical in any farming operation. County demonstrations and
the District Standardized tests will give a broader comparison between varieties. Several years of
comparing varieties should result in the selection of the most proven varieties.
Table 1
COTTON VARIETY COMPARISON
Ralph Koopman Farm
DeWitt County, Texas, 1995
Precinct 3
|
COMPANY |
VARIETY |
PLT POP
(1000s) |
%
TURNOUT |
BOLLS/
LB LINT |
LINT
LB/AC |
| SURE-GROW | SGS 404 | 61.5 | 36.8 | 317 | 895 |
| DELTAPINE | DPL 5409 | 76.0 | 39.2 | 346 | 866 |
| STONEVILLE | STV 474 | 48.5 | 39.9 | 301 | 852 |
| STONEVILLE | STV 132 | 38.5 | 40.2 | 269 | 818 |
| HARTZ | H1244 | 44.2 | 39.0 | 276 | 811 |
| STPSA | MD 51 NE | 80.7 | 37.3 | 319 | 809 |
| DELTAPINE | DPL 50 | 53.5 | 35.9 | 313 | 807 |
| PAYMASTER | HS 44 | 58.0 | 37.1 | 337 | 807 |
| STONEVILLE | LA 887 | 61.0 | 39.5 | 258 | 802 |
| SURE-GROW | SGS 501 | 40.8 | 39.1 | 277 | 792 |
| TAMU | CABCS | 41.2 | 37.0 | 326 | 791 |
| DELTAPINE | DPL 5415 | 53.7 | 39.0 | 326 | 782 |
| HOLLAND | H 186 | 69.0 | 36.4 | 308 | 775 |
| AVERAGE | 55.9 | 38.2 | 306 | 816 |
Table 2
FIBER QUALITY CHARACTERISTICS
Ralph Koopman Farm
DeWitt County, Texas, 1995
Precinct 3
|
COMPANY |
VARIETY |
MICRO-NAIRE | LENGTH
(INCHES) |
UNIFORM
RATIO |
STRENGTH
(G/TEX) |
%
ELONG. |
| SURE-GROW | SGS 404 | 3.9 | 1.08 | 82.7 | 31.0 | 6.7 |
| DELTAPINE | DPL 5409 | 3.5 | 1.08 | 81.7 | 26.3 | 7.1 |
| STONEVILLE | STV 474 | 4.0 | 1.08 | 83.4 | 24.2 | 6.2 |
| STONEVILLE | STV 132 | 3.5 | 1.08 | 82.6 | 25.9 | 7.4 |
| HARTZ | H1244 | 3.7 | 1.12 | 85.2 | 27.8 | 7.6 |
| STPSA | MD 51 NE | 3.6 | 1.10 | 82.2 | 32.4 | 6.4 |
| DELTAPINE | DPL 50 | 3.9 | 1.12 | 81.9 | 23.0 | 7.4 |
| PAYMASTER | HS 44 | 3.7 | 1.08 | 81.7 | 25.8 | 6.4 |
| STONEVILLE | LA 887 | 3.9 | 1.10 | 83.7 | 29.9 | 6.8 |
| SURE-GROW | SGS 501 | 4.2 | 1.08 | 83.5 | 32.2 | 7.1 |
| TAMU | CABCS | 2.8 | 1.06 | 79.7 | 21.7 | 7.2 |
| DELTAPINE | DPL 5415 | 4.0 | 1.09 | 82.3 | 26.9 | 7.1 |
| HOLLAND | H 186 | 3.3 | 1.04 | 81.1 | 28.6 | 6.6 |
| AVERAGE | 3.7 | 1.09 | 82.4 | 27.4 | 6.9 |