Proceedings of the 21st Annual Meeting, Southern Soybean Disease Workers (March 6-8, 1994, Tulsa, Oklahoma)

Contents 1993-94 SSDW Committee Chairs 1993-94 SSDW Officers Graduate student competition Resistance of Soybean Cultivars in Maturity Group IV-VIII to Rotylenchulus reniformis. JJ Cornelius and GW Lawrence Evaluation of Susceptibility of Soybean to Red Crown Rot caused by Calonectria crotalariae in the Field. KD Kim, JS Russin, and JP Snow Contributed papers Soybean Disease Loss Estimate for the Southern United States During 1993, Table 1. Estimated percent Joss of soybean yields in 1993 to disease, Table 2. Estimated reduction of soybean yields in 1993 to disease, and Table 3. Southern states soybean disease loss estimate total in bushels and dollars, 1993. Compiled by JA Wrather Aerial Blight Associated with Delayed Maturity of Soybean. IA Fox, MA Blaine, and GL Sciumbato Relationship of Phytophthora Resistance to Soybean Yield. GL Sciumbato., FG Hancock, JA Fox, and D Boykin Effects of Long-Term Tillage Practices on Soil Populations of Microsclerotia of Macrophomina phaseolina. SR Kendig and JA Wrather Effect of Maturity Group, Growth Stage, and Planting Date on Progress of Sudden Death Syndrome of Soybean. JC Rupe and EE Gebur, Jr Additional Soybean Plant Introductions Resistant to Soybean Cyst Nematode. LD Young Frogeye Leaf Spot Control in Soybeans with Foliar-Fungicides. AY Chambers Interaction of the Root-Knot Nematode, Meloidogyne incognita, with Selected Weed Species Present in Soybean Fields in Louisiana. EC McGawley, JS Russin, and JL Griffin Population Development by Meloidogyne incognita and Heterodera glycines on Soybean Stressed by Weeds and Defoliation. JS Russin, EC McGawley, and LL Griffin Resistance to Rotylenchulus reniformis in Soybean. RT Robbins and L Rakes Treasurer\u27s report. GG Hammes Proceedings of the Southern Soybean Disease Workers are published annually by the Southern Soybean Disease Workers. Text, references, figures, and tables are reproduced as they were submitted by the authors. The opinions exposed by the participants at this conference are their own and do not necessarily represent the views of the Southern Soybean Disease Workers. Mention of trademark or propriety products in this Proceedings does not constitute a guarantee, warranty, or endorsement of that product by the Southern Soybean Disease Workers

Proceedings of the 19th Annual Meeting, Southern Soybean Disease Workers (February 19-20, 1992, St. Louis, Missouri)

Contents Southern Soybean Disease Workers 1991-1992 officers 1991-1992 Program Committee Graduate student competition Interactions of Macrophomina phaseolina with two soybean cultivars under four irrigation regimes. SR Kendig and JC Rupe Influence of soybean planting dates on the incidence and severity of Sudden Death Syndrome. SS Alghamdi, PT Gibson, and MA Shenaut The interrelationship of Heterodera glycines and Fusarium solani in sudden death syndrome of soybean. KS McLean and GW Lawrence Frogeye leaf spot of soybean: evaluation of cultivars and isolates. PF Pace, DB Weaver, and LD Ploper Soybean cyst nematode race symposium SCN race scheme: a historical perspective. JA Fox Races of Heterodera glycines: a nematological perspective. TL Niblack Races of Heterodera glycines and level of resistance in soybean cultivars. SC Anand Differentiating soybean responses to soybean cyst nematode races. DP Schmitt and JG Shannon Strategies for improved soybean yields and profits in the Southern US. JH Palmer Contributed papers Evaluation of resistance to Rhizoctonia Foliar Blight of soybean. CS Kousik, GB Padgett, JP Snow, and BG Harville Five years of soybean variety testing for SDS response. PT Gibson, M Schmidt, MA Shenaut, and O Myers, Jr Effect of tillage, planting date, and cultivar on the severity of sudden death syndrome, Septoria brown spot and downy mildew of soybean. JA Wrather, TL Niblack, GS Smith, and SC Anand Effect sof soybean planting date on severity of stem canker. AY Chambers Comparative virulence of stem canker isolates from southern soybean growing areas. GL Sciumbato and BL Keeling Effects of a low rate of aldicarb on soybean canopy development and yield, weed and insect populations in Heterodera glycines-infested fields. SR Koenning, KR Barker, HD Coble, and JR Bradley Effect of soybean cyst nematode on soybean isolines differing for maturity. WJ Wiebold and TL Niblack Effect of repeated application of selected herbicides and nematicides/insecticides on soybean cyst nematode density. P Donald, A Keaster, R Kremer, and B Sims Southern United States soybean disease loss estimate for 1991. Southern Soybean Disease Workers, Soybean Disease Loss Estimate Committee. Compiled by GL Sciumbato and DL Turnage SSDW Treasurer\u27s report. GG Hammes Southern Soybean Disease Workers 1990-1991 committee chairmen Southern Soybean Disease Workers 1991 award recipients Proceedings of the Southern Soybean Disease Workers is published annually by the Southern Soybean Disease Workers. Text, references, figures, and tables are reproduced as they were submitted by the author(s). The opinions expressed by the participants at this conference are their own and do not necessarily represent the views of the Southern Soybean Disease Workers. Mention of trademark or propriety product in this Proceedings does not constitute a guarantee, warranty, of endorsement of that product by the Southern Soybean Disease Workers

Proceedings of the 23rd Annual Meeting, Southern Soybean Disease Workers (March 24-25, 1996, Biloxi, Mississippi)

Contents Business session Soybean Disease Loss Estimate for the Southern United States during 1995. JA Wrather Treasurer report. GG Hammes SSDW Committee Chairmen for 1995-1996 Graduate student papers Effects of Bacteria Associated with Heterodera glycines in Soybean Fields of Arkansas. TK Field, RD Riggs, and TL Hart Influence of Soybean Pest Complexes on Maturation of Soybean Looper, Pseudoplusia includens. CH Carter, JS Russin, EC McGawley, DJ Boethel, and JL Griffin Contributed papers Resistance to Cyst Nematode in PI 437654 and Hartwig Soybeans. SC Ananad Rotation with Soybean Cultivar Hartwig and Nonhost Crops for Management of the Soybean Cyst Nematode. SR Koenning and KR Barker Relationship of Yield to the Development of Sudden Death Syndrome. JC Rupe Further Evaluation of Date of Planting Effects on Severity of Soybean Stem Canker. AY Chambers Proceedings of the Southern Soybean Disease Workers are published annually by the Southern Soybean Disease Workers. Text, references, figures, and tables are reproduced as they were submitted by the authors. The opinions exposed by the participants at this conference are their own and do not necessarily represent the views of the Southem Soybean Disease Workers. Mention of trademark or propriety products in this proceedings does not constitute a guarantee, warranty, or endorsement or that product by the Southern Soybean Disease Workers

Proceedings of the 22nd Annual Meeting, Southern Soybean Disease Workers (February 20-22, 1995, St. Louis, Missouri)

Contents Business session Soybean Disease Loss Estimate for the Southern United States during 1994. JA Wrather Treasurer report. GG Hammes SSDW Committee Chairmen for 1994-1995 Graduate student papers Host preference of Rotylenchulus reniformis for weed species common to Louisiana soybean. CH Carter, EC McGawley, and JS Russin Development of an immunoassay for Heterodera glycines eggs. MJ Kennedy, JE Schoelz, TL Niblack, PA Donald Effects of delayed planting and host susceptibility on colonization of soybean by Calonectria crotalariae and development of red crown rot. PU Kuruppu, JS Russin, and EC McGawley Effects of long-term corn/soybean rotation on pathogenicity of Pythium populations on soybean. BQ Zhang and XB Yang Contributed papers Possible shift to more virulent Phytophthora races in Mississippi. GL Sciumbato and BL Keeling The relationship between trehalose content and dormancy of soybean cyst nematode, Heterodera glycines. JH Yen, AL Karr, TL Niblack, and WJ Weibold Fertilization effects on Sudden Death Syndrome (SDS) in soybeans. MA Newman, AY Chambers, and DD Howard Screening southern soybean cultivars for reaction to aerial blight. BG Harville, JS Russin, and RJ Habetz Comparison of continuous soybean, fallow, and rotation with sorghum-sudan grass hybrid for nematode control in a field infested with root-knot and soybean cyst nematodes. R Rodríguez-Kábana, DB Weaver, and EL Carden Recent progress in identifying soybean cultivars field tolerance of Macrophomina phaseolina. GS Smith and ON Carvil Major soybean diseases in Brazil. JT Yorinori Pre- and post-infection efficacy of benomyl for the control of stem canker of soybean. JC Rupe and CM Becton Comparison of continuous soybean and rotation with cotton for nematode control in a field infested with root-knot and soybean cyst nematodes. DB Weaver, R Rodríguez-Kábana, and EL Carden A rapid screening method for resistance to nematodes and soilborne pathogens using alginate films. N Kokalis-Burelle, N Martínez-Ochoa, DB Weaver, and R Rodríguez-Kábana Progress of a project to identify differential cultivars and races of Cercospora sojina. DV Phillips and HR Boerma Proceedings of the Southern Soybean Disease Workers are published annually by the Southern Soybean Disease Workers. Text, references, figures, and cables are reproduced as they were submitted by the authors. The opinions exposed by the participants at this conference are their own and do not necessarily represent the views of the Southern Soybean Disease Workers. Mention of trademark, or propriety products in this Proceedings does not constitute a guarantee, warranty, or endorsement of that produce by the Southern Soybean Disease Workers

Proceedings of the 17th Annual Meeting, Southern Soybean Disease Workers (March 20-22, 1990, Biloxi, Mississippi): Soybean Disease Control at a Crossroad

Contents Southern Soybean Disease Workers Officers 1989-1990 Southern Soybean Disease Workers Program Committee 1989-1990 Southern Soybean Disease Workers Committee Chairmen 1989-1990 General session Presidential address. B Gazaway Keynote address. K Smith Invited speakers Future Impacts of Biotechnology on Soybean Production and Uses. X Delannay Diseases of Soybean Associated with International Seed Trade. B Moore Impact of Regulatory Change and GLP\u27s on New Fungicide Discovery and Development. G Hammes Graduate student papers Double-Stranded RNA and Virus-Like Particles From the Soybean Stem canker Pathogen, Diaporthe phaseolorum var. caulivora. Y Lee, JP Snow, GT Berggren, and RA Valverde Development of Soybean Varieties Resistant to Phomopsis Seed Decay. MS Zimmerman and HC Minor Cloning of the vir Region of Agrobacterium tumefaciens Chry 5, a Strain Highly Virulent on Soybean. LG Kovacs, JA Wrather, and SG Pueppke Role of Overwintering Bean Leaf Beetle in the Epidemiology of Bean Pod Mottle Virus in Soybeans in Kentucky. JR dosAnjos, SA Ghabinal, DE Hershman, and DW Johnson Contributed papers SSDW soybean Disease Loss Estimates G Sciumbato Effects of Amino Acid Biosynthesis Inhibiting Herbicides on in vitro Growth and Development of Calonectria crotalariae. DK Berner, GT Berggren, and JP Snow Infection Cushion Formation by Rhizoctonia solani on Soybean Leaves. CS Kousik, JP Snow, and GT Berggren Is Stem Canker Monocyclic? KV SubbaRao, JP Snow, and GT Berggren Early-season Fungicide Sprays for Soybean Stem Canker Control. AY Chambers SSDW business session Treasurer\u27s report, 1989. G Hammes Contributed paper session Effect of Frogeye Leaf Spot on Soybeans in Florida. FM Shakes and CK Hiebsch Comparison of Application Timing of Two Foliar Fungicides for Control of Soybean Diseases. JC Rupe and MJ Cochran Performance of Soybean Lines under Stress Due to Brown Stem Rot, Soybean Cyst Nematode, and Iron Deficiency Chlorosis. LM Mansur, H Tachibana, and K Bidne Performance of Soybean Cultivars in Cyst and Peanut Root-Knot Nematode Infested Fields. CE Drye, DK Barefield, ER Shipe, and JD Mueller Yield of Aldicarb Treated Nematode Resistant and Susceptible Soybean Varieties. CE Drye, ER Garner, and JD Mueller Distribution, Races, and Effects of Soybean Cyst Nematode in Missouri. TL Niblack and GS Smith Performance of Selected Nematicides in a Field Infested with Root-Knot and Cyst Nematodes. RW Young, R Rodríguez-Kábana, and EL Carden Performance of Selected Soybean Cultivars in a Field Infested with Meloidogyne arenaria and Heterodera glycines. DG Robertson, R Rodríguez-Kábana, D Weaver, and EL Carden Sorghum-Soybean Rotation for the Management of Root-Knot and Cyst Nematodes: Long Term Effects. CF Weaver, R Rodríguez-Kábana, DB Weaver, and EL Carden Bahiagrass-Soybean Rotation for the Management of Root-Knot and Cyst Nematodes: Long Term Effects. PS King, R Rodríguez-Kábana, DB Weaver, and EL Carden Peanut-Soybean Rotations for the Management of Meloidogyne arenaria. R Rodríguez-Kábana, and DG Robertson Field Evaluation of Polyspecific Nematode Resistance in Soybean. DB Weaver, R Rodríguez-Kábana, and EL Carden Long Term Effects of Selected Rotations with Soybeans and Corn on Populations of Meloidogyne arenaria. R Rodríguez-Kábana, and D.G. Robertson Histopathology of Soybean Roots Inoculated with Fusariurn solani and Heterodera glycines. KS McLean, KW Roy and GW Lawrence. The opinions expressed by the participants at this conference are their own and do not necessarily represent the views of the southern Soybean Disease Workers (SSDW). Text, references, figures, and tables are reproduced essentially as they were supplied by the author(s) of each paper. Mention of pesticides does not constitute a recommendation for use, nor does it imply that the pesticides are registered under the Federal Insecticide, Fungicide, and Rodenticide Act as · amended. The use of trade names in this publication does not constitute a guarantee, warranty, or endorsement of the products by SSDW

Proceedings of the 20th Annual Meeting, Southern Soybean Disease Workers (March 28-30, 1993, Fort Walton Beach, Florida)

Contents Sustainable agriculture symposium Sustainable Agriculture and the Soybean Industry: Building a Winning Strategy. D Hubbard and MS Fitzner Impact of Pest Interactions on Management Programs. J Funderburke Introducing Procedures of Sustainable Agriculture, a Team Approach. J Bradley Sustainable Agriculture Practices and Their Impact on Plant Diseases. C Rothrock Graduate student competition Effect of Increasing Initial Inoculum Levels of Rotylenchus reiformis on Soybean. JJ Cornelius and GW Lawrence Effect of Frogeye Leaf Spot on Yield of Soybean Lines Near-Isogeneic for Resistance. PF Pace, DB Weaver, LD Flopper, and PA Backman Heritability and Genotype X Environment Interaction of Partial Resistance to Soybean Sudden Death Syndrome in Two Crosses. VN Njiti, MA Shenaut, RJ Suttner, JH Klein, WJ Matthews, and PT Gibson Contributed papers Soybean-Cotton Rotations for the Management of Plant-Parasitic Nematodes. DG Robertson and R Rodríguez-Kábana Soybean-Peanut Rotations for the Management of Nematode Problems in Peanut. PS King and R Rodríguez-Kábana Velvetbean for the Management of Nematode Problems in Soybean. CF Weaver and R Rodríguez-Kábana The Management of Nematode Problems with Corn and Soybean Rotations: A Ten Year Study. R Rodríguez-Kábana Effect of Wheat Residue and Tillage on Soybean Cyst Nematode and Soybean Yield in Doublecrop soybeans in Kentucky. DE Hershman and PR Bachi Survival of Soybean Cyst Nematode. RD Riggs Effects of Planting Date on Population Dynamics of Soybean Cyst Nematode on Soybean. RD Riggs Selection of Soybean Cyst Nematode Resistant Cultivars to Optimize Yield. LD Young Effects of Carriers of ARF18 Fungus on The Control of Soybean Cyst Nematode. DG Kim and RD Riggs Simultaneous Screening in Greenhouse for Frogeye Leaf Spot and Cyst Nematode in Soybeans. WK Cork and SC Anand Correlation of Stem Canker Susceptibility to Soybean Yield Loss. GL Sciumbato and BL Keeling Effect of Crop Rotation, Tillage, and Planting Date on Stem Canker Incidence in Soybean. JH Edwards, DB Weaver, PA Backman, and ME Ruf Infection Timing and the Development of Stem Canker in Soybean. EA Sutton and JC Rupe Further Evaluation of Early-Season Fungicide Sprays for Soybean Stem Canker Control. AY Chambers Southern United States Soybean Disease Loss Estimate for 1992, Table 1. Estimated percent loss of soybean yield in 1992 to disease, Table 2. Estimated reduction of soybean yields in 1992 to disease, and Table 3. Southern states soybean disease loss estimate in bushels-dollars-1992. Compiled by GL Sciumbato and DL Turnage Treasurer\u27s report. GG Hammes 1992-1993 committee chairs 1992 award recipients Proceedings of the Southern Soybean Disease workers is published annually by the Southern Soybean Disease Workers. Text, references, figures, and tables are reproduced as they were submitted by the author(s). The opinions expressed by the participants at this conference are their own and do not necessarily represent the views of the Southern Soybean Disease Workers. Mention of trademark or propriety product in this Proceedings does not constitute a guarantee, warranty, or endorsement of that product by the Southern Soybean Disease Workers

Proceedings of the 24th Annual Meeting, Southern Soybean Disease Workers (March 15-16, 1997, Fort Walton Beach, Florida)

Contents Business session Soybean Disease Loss Estimate for the Southern United States during 1996. Compiled by PW Pratt Treasurer report. GG Hammes SSDW Committee chairmen for 1996-1997 Graduate student papers Characterization of Races of Phytophthora sojae in Arkansas and Their Effects on Commonly Grown Cultivars. TA Jackson, TL Kirkpatrick, and JC Rupe Induction of Defense Related Proteins During Compatible and Incompatible Soybean-Cercospora sojina Interactions. WA Baker, J Qiu, CB Lawrence, S Tuzun, and DB Weaver Contributed papers Performance and Cyst Nematode Resistance of Selected Soybean Cultivars in North Carolina Production Fields. SR Koenning and KR Barker Distribution and Diversity of Heterodera glycines in Delaware. RP Mulrooney, NF Gregory, and RB Carroll Foliar Fungicides for Frogeye Leaf Spot Control in Soybeans. AY Chambers Characterization and Control of Soybean Severe Stunt: A New Soilborne Virus Disease of Soybean. TA Evans, RP Mulrooney, R Taylor, and RB Carroll Results of a Preliminary Phytophthora sojae Survey in Kentucky. DE Hershman and TS Abney Reaction of Entries in the Mississippi Soybean Varietal Trials to the Common Races of Phytophthora sojae Isolated in Mississippi in 1996. GS Sciumbato, BL Keeling, JA Fox, and JA Askew The Impact of Phytophthora Root Rot, SDS, and Virus(es) on Yield in Soybean Variety Trials in Mississippi in 1996. IA Fox, GS Sciumbato, BL Keeling, and JE Askew, Jr Velvetbean and Bahiagrass Effects on Yield and Nematode Populations in a Field Infested with Root-Knot and Soybean Cyst Nematodes. DB Weaver, R Rodríguez-Kábana, and DG Robertson Velvetbean and Bahiagrass Effects on Yield and Nematode Populations in a Field Infested with Root-Knot and Other Plant-Parasitic Nematodes. R Rodríguez-Kábana, DB Weaver, CF Weaver, and DG Robertson Susceptibility of Selected Soybean Cultivars to Lesion Nematodes. R Rodríguez-Kábana, J Pinochet, DB Weaver, and PS King Estimating Soybean Yield Loss Caused by Rhizoctonia Foliar Blight. KC Stetina and JS Russi

Proceedings of the 18th Annual Meeting, Southern Soybean Disease Workers (March 20-21, 1991, Lexington, Kentucky): National Perspective on Soybeans

Contents General session Presidential address. DE Hershman Keynote address. P O\u27Connell Invited speakers Major Soybean Diseases of the Midwest and Their Management. TS Abney Major Soybean Diseases of the Southeast and Their Management. WF Moore Disease Resistance in the Defense of Yield: A Commercial Breeders Perspective. HL Gabe Graduate student papers Effects of potassium fertilization and weed control on the severity.of anthracnose and pod and stem blight of soybeans in Louisiana. FG Barker, GT Berggren, and JP Snow Inheritance of soybean SDS response in segregating F5 derived lines. WJ Matthews, VN Njiti, PT Gibson, and ML Shenaut Selection of soybean genotypes with superior field weathering qualities. SL Zimmerman and HC Minor Southern stem canker epidemics: the infection window and the relationship between inoculation timing and yield of soybeans. GB Padgett, JP Snow, and GT Berggren Comparison of southern and northern isolates of Diaporthe phaseolorum var. caulivora, the soybean stem canker pathogen. YH Lee and JP Snow Contributed papers Soybean sudden death syndrome cultivar response. PT Gibson, ML Shenaut, VN Njiti, W Matthews, M Schmidt, and O Myers Chitinolytic fungi associated with Heterodera glycines in Missouri. P Donald and T Niblack Sources of resistance to Heterodera glycines in soybean cultivars. SC Anand J77-339: a soybean line highly susceptible and highly resistance to stem canker. AY Chambers Comparison of inoculation methods for the evaluation of soybean resistance to stem canker. GL Sciumbato and BL Keeling Evaluation of cultivars for stem canker resistance in an inoculated nursery. JP Snow and GB Padgett Saprophytic ability of the soybean stem canker pathogen and formation of perithecia on host and non-host plants. YH Lee, KB SubbaRao, and JP Snow Soybean yield losses due to leaf blights in Indiana. TS Abney and E Penaloza Incidence of SCN in Ontario and the effect of planting date on yield losses. TR Anderson, TW Welacky, and H Olechowski Influence of seven rotation options on Heterodera glycines egg densities and yield of Linford and Williams 82 soybean cultivars. GS Smith and T Niblack Soybean-peanut rotations for the management of Meloidogyne arenaria. R Rodríguez-Kábana, DG Robertson, L Wells, and PS King Tropical corn-soybean rotation in a field infested with root-knot and cyst nematodes. R Rodríguez-Kábana, DB Weaver, DG Robertson, CF Weaver, EL Carden, and MD Pegues Long-term effects of bahiagrass-soybean rotation on soybean yields in a field infested with Meloidogyne arenaria and Heterodera glycines. R Rodríguez-Kábana, DB Weaver, DG Robertson, EL Carden, and MD Pegues Sorghum-soybean rotations for the management of root-knot and cyst nematodes in South Alabama. R Rodríguez-Kábana, DB Weaver, DG Robertson, RW Young, EL Carden, and MD Pegues Rival soybean seed treatments: a review of field performance. R Knake Unified Soybean Disease Ratings. GR Bowers, Jr Stem Canker Disease Rating. GR Bowers, Jr, PA Backman, JD Hicks, MA Newman Business session Southern United States Soybean Disease Loss Estimates for 1990. GL Sciumbato Treasurer\u27s report. GG Hammes Committee Chairmen for 1990-1991 SSDW 1990 Award Recipients Proceedings of the Southern Soybean Disease Workers is published annually by the Southern Soybean Disease Workers. Text, references, figures, and tables are reproduced as they were submitted by the author(s). The opinions expressed by the participants at this conference are their own and do not necessarily represent the views of the Southern Soybean Disease Workers. Mention of trademark or propriety product in this Proceedings does not constitute a guarantee, warranty, of endorsement of that product by the Southern Soybean Disease Workers