Wilt. Regional. Fusarium. Report. Cotton. -~ I Ib _,C~g~gq~glsble1llM1IM

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1 he 1993 Regional Cotton Fusarium Wilt Report is _11-J~b -~ I Ib _,C~g~gq~glsble1llM1IM Department of Agronomy a.oils -.. Departmental Series No. 173 Alabama Agricultural Experiment Station Auburn University Lowell T. Frobish, Director Auburn Unih,rsity November 1993

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3 1993 REGIONAL COTTON FUSARIUM WILT REPORT 1 K. M. Glass and W. S. Gazaway 2 Cotton cultivars and elite breeding lines submitted by 24 cooperators were evaluated for fusarium wilt resistance under field conditions at the E. V. Smith Research Center, Shorter, Alabama. These entries were grown on an Independence loamy fine sand highly infested with both the fusarium wilt fungus (Fusarium oxysporum) Schlect. f. vasinfectum [Atk.] (Snyd. & Hans.) and root-knot nematodes (Meloidogyne incoqneta.). Plots were 40-inch-wide rows, 30 feet in length, separated by 6-foot alleys. Four replications of the test entries and checks, arranged in a block design, were evaluated. Both susceptible (Rowden) and resistant (Auburn 56) cultivars were included as checks. Auburn 56, developed at Auburn and released in 1953, was used as the resistant check in the Regional Fusarium Wilt Test for many years. However, it was replaced when it was no longer grown commercially. Auburn 56 is again being used as the resistant check, because it is the most consistently resistant cultivar available. Rowden was planted in row 5 and every tenth row thereafter (15, 25,...,275) and Auburn 56 in row 10 and every tenth row thereafter (20, 30,...,270) throughout the test. Plots were planted May 7. Initial plant counts were made IThis report is a joint contribution between USDA-ARS, Crop Science Research Laboratory, Mississippi State, Mississippi, and the Alabama Agricultural Experiment Station, Auburn University, Alabama. 2 Research Assistant of Agronomy and Soils and Professor and Extension Plant Pathologist/Nematologist.

4 on June 2. Wilted plants were counted and removed on June 25, July 9, July 27, and August 24. The remaining live plants were also counted and recorded on August 24. Percent wilted plants were then determined and mean wilting for a given entry calculated. Average wilting of the susceptible Rowden was 93, 85, 94, and 76 percent for the four replications (87 percent average). Corresponding wilt percentages for the resistant check, Auburn 56, were 52, 37, 55, and 37 (45 percent average). Critical evaluation of a given entry should be made relative to the checks closest to the entry within each replication. Evaluation of breeding process or evaluation of entries over years should be made only between the relative value of this entry and that of the closest susceptible check rows for each year. Entries submitted by Kathryn Glass are commonly grown cultivars or advanced commercial materials and are listed by name. Entries submitted by other cooperators are listed by their coded numbers. Additional information regarding the genetic background of a specific coded entry should be obtained from the named cooperator. Information contained herein is available to all persons without regard to race, color, sex, or national origin. [4]

5 designation Mean 1 C. Wayne Smith, Dept. of Soil & Crop Sci., Texas A&M Univ., College Station, TX WS WS WS WS ROWDEN WS WS WS WS AUBURN James L. Starr, Dept. of Plant Pathology and Microbiology, Texas A & M University, College Station, TX JS JS JS JS ROWDEN JS JS JS JS AUBURN J. Jefferson Gwyn, Chembred, Inc., So. 5 1 st Street, Phoenix, AZ CB CB CB CB ROWDEN CB Acala CB Acala CB Acala CB AUBURN [5]

6 designation Mean 4 Bobby Phipps, Agrigenetics, W. Van Buren St. Goodyear, AZ AGC AGC AGC AGC ROWDEN AGC AGC AGC AGC AUBURN Fred Bourland, 115 Plant Science Bldg., Univ. of Arkansas, Fayetteville, AR FB FB FB FB ROWDEN FB FB FB FB AUBURN John Green, Seed Source, Inc., 106 4th Street, Leland, MS JMG-l a JMG JMG ALG ROWDEN JMG JMG JMG JMG AUBURN [6]

7 designation Mean 7 Peggy Thaxton, Dept. of Soil & Crop Sci., Texas A&M Univ., College Station, TX PMT PMT PMT PMT ROWDEN PMT PMT PMT PMT AUBURN Laval M. Verhalan, Dept. of Agronomy, Oklahoma State Univ., Stillwater, OK OKLA OKLA OKLA OKLA ROWDEN OKLA OKLA OKLA OKLA AUBURN R. R. Bridge, Suregrow Research, P.O. Box 312, Leland, MS SG SG SG SG ROWDEN SG SG SG SG AUBURN [7]

8 designation Mean 10 Larry Burdett, Delta and Pine Land Co., 1305 N. VIP Blvd. Casa Grande, AZ * ROWDEN AUBURN Lloyd May, CPRU, P. 0. Box 3039, Florence, SC L.MAY L.MAY L.MAY L.MAY ROWDEN L.MAY L.MAY L.MAY L.MAY AUBURN Richard Sheetz, Cargill Hybrid Seed, Box 2, Aiken, TX ROWDEN AUBURN [8]

9 designation Mean 13 Shelby H. Baker, Univ. of Georgia, Coastal Plain Station, Tifton, GA GA GA GA GA ROWDEN GA GA GA GA AUBURN Keith R. Jones, Delta & Pine Land Co., P.O. Box 157, Scott, MS DPL DPL DPL DPL ROWDEN DPL DPL DPL DPL AUBURN Bill Falaga, Terra International Inc., P. 0. Box , Memphis, TN ROWDEN AUBURN [9]

10 designation Mean 16 Kamal M. El-Zik, Dept. of Soil & Crop Sci., Texas A&M Univ., College Station, TX KME KME KME KME ROWDEN KME KME KME KME AUBURN Curtis Williams, Jacob Hartz Seed Co., Inc., P.O. Box 946, Stuttgart, AR ROWDEN AUBURN Jim Mitchell, Jacob Hartz Seed Co., Inc., P.O. Box 946 Stuttgart, AR JM JM JM JM ROWDEN [10]

11 designation Mean 19 D. Steven Calhoun, Dept. of Agronomy, 104 Madison B. Sturgis Hall, Louisiana State Univ., Baton Rouge, LA LA LA LA LA AUBURN Don Panter, Stoneville Pedigreed Seed Co. Inc., Box 167, Stoneville, MS DMP DMP DMP DMP ROWDEN DMP DMP DMP DMP AUBURN A. L. Germany, Stoneville Pedigreed Seed Co. Inc., Box 167, Stoneville, MS SPSCO SPSCO SPSCO SPSCO ROWDEN SPSCO SPSCO SPSCO SPSCO AUBURN [11]

12 desigcrnation Mean 22 Johnie N. Jenkins, Crop Sci. Research Laboratory, P.O. Box 5367, Mississippi State, MS JNJ JNJ JNJ JNJ ROWDEN JNJ JNJ JNJ JNJ-8* AUBURN JNJ JNJ JNJ JNJ ROWDEN JNJ JNJ JNJ JNJ AUBURN Freddie M. Miller, Terra International Inc., Box , Memphis, TN ROWDEN AUBURN [12]

13 designation Mean 24 Kathryn M. Glass, Dept. of Agronomy and Soils, Auburn University, Auburn University, AL PD Stoneville Deltapine DP Hyperformer HY ROWDEN Suregrow Deltapine Chembred CB Georgia King AUBURN Stoneville KC Hyperformer HS Deltapine DP Terra C ROWDEN GA Suregrow Hollybrook HB Stoneville X ' AUBURN Stoneville SS Hyperformer HS Deltapine DP ROWDEN DES Terra Suregrow GA AUBURN Chembred CB Stoneville LA SS Deltapine ROWDEN Hyperformer HS Deltapine Acala Terra Suregrow AUBURN Stoneville X Hollybrook HB Deltapine Stoneville Rowden [13]

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