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Proceedings Of The 23rd Annual Meeting, Southern Soybean Disease Workers (March 24-25, 1996, Biloxi, Mississippi), Brian M. Anderson, Robert P. Mulrooney, Gabe Sciumbato, John Russin, Glenn G. Hammes

Southern Soybean Disease Workers: Conference Proceedings

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. …

The Complete Nucleotide Sequence And Genome Organization Of The M Rna Segment Of Peanut Bud Necrosis Tospovirus And Comparison With Other Tospoviruses, Satyanarayana Tatineni, S. E. Mitchell, D. V. R. Reddy, S. Kresovich, R. Jarret, R. A. Naidu, S. Gowda, J. W. Demski

Department of Plant Pathology: Faculty Publications

The M RNA of peanut bud necrosis virus (PBNV; synonym groundnut bud necrosis virus) is 4801 nucleotides in length. It comprised two ORFs in an ambisense organization and terminal inverted repeats. The 3' large ORF (3363 nucleotides in the virus-complementary strand) encoded a protein with a predicted size of 127.2 kDa which was identified as the glycoprotein precursor (GP) of the G1 and G2 glycoproteins. A comparison of the deduced amino acid sequence of GP revealed 37 % identity and 58-59% similarity with that of tomato spotted wilt virus (TSWV, serogroup I) and impatiens necrotic spot virus (INSV, serogroup III), …

Peanut Bud Necrosis Virus: Purification Of Nucleocapsids And Sequence Homology Of Nucleocapsid Protein And Glycoprotein Precursor With Other Tospoviruses, Satyanarayana Tatineni, S. E. Mitchell, D. V. R. Reddy, S. Brown, S. Kresovich, R. Jarret, S. Gowda, R. A. Naidu, J. W. Demski

Department of Plant Pathology: Faculty Publications

A procedure for the purification of peanut bud necrosis virus (PBNV) nucleocapsids was developed. Virus particles were treated with nonionic detergent to disrupt the envelope membrane and free nucleocapsids were separated. into three lightscattering zones after sucrose gradient centrifogation. Nucleocapsids from the top zone contained S RNA and traces ofM RNA; whereas, nucleoplasids from the middle zone contained M RNA with detectable levels of S RNA and those from the bottom zone contained L RNA with traces of M and S RNAs. Clones from a cDNA library made from the purified PBNV Sand M RNAs were characterized and sequenced. Comparison …

Diagnosis And Resistance Breeding Of Peanut Bud Necrosis Virus, D. V. R. Reddy, Satyanarayana Tatineni, S. L. Dwivedi, A. S. Ratna, A. A. M. Buiel, G. V. Ranga Rao, S. N. Nigam, R. A. Naidu, H. T. Hsu, J. W. Demski

Department of Plant Pathology: Faculty Publications

The occu!fence of peanut bud necrosis (PBN) disease in India was first reported in 1968. The high incidence ofPBN disease during the 1960s coincided with largescale imports of the peanut cultivars Asiria Mwitundae and Spanish Improved, both of which are highly susceptible to PBN. Since then, a number of reports have been published in India describing bud necrosis under at least seven different names (Reddy 1988). Crop losses due to PBN have been estimated at USD89 million per year in India during 1976-1986. The disease is also currently recognized as economically important in Nepal (Sharma 1996), in Sri Lanka, and …

Fumonisins And Alternaria Alternata Lycopersici Toxins: Sphinganine Analog Mycotoxins Induce Apoptosis In Monkey Kidney Cells, Hong Wang, Clinton Jones, Janice Caiacci-Zanella, Todd Holt, David G. Gilchrist, Martin B. Dickman

Department of Plant Pathology: Faculty Publications

Fusarium moniliforme toxins (fumonisins) and Alternaria alternata lycopersici (AAL) toxins are members of a new class of sphinganine analog mycotoxins that occur widely in the food chain. These mycotoxins represent a serious threat to human and animal health, inducing both cell death and neoplastic events in mammals. The mechanisms by which this family of chemical congeners induce changes in cell homeostasis were investigated in African green monkey kidney cells (CV-1) by assessing the appearance of apoptosis, cell cycle regulation, and putative components of signal transduction pathways involved in apoptosis. Structurally, these mycotoxins resemble the sphingoid bases, sphingosine and sphinganine, that …

A Mammalian 2-5a System Functions As An Antiviral Pathway In Transgenic Plants, Amitava Mitra, Dan W. Higgins, William G. Langenberg, Huiqin Nie, Dibyendu N. Sengupta, Robert H. Silverman

Department of Plant Pathology: Faculty Publications

Resistance to virus infections in higher vertebrates is mediated in part through catalysis of RNA decay by the interferon-regulated 2-5A system. A functional 2-5A system requires two enzymes, a 2-5A synthetase that produces 5"phosphorylated, 2',5'-linked oligoadenylates (2-5A) in response to double-stranded RNA, and the 2-5A-dependent RNase L. We have coexpressed these human enzymes in transgenic tobacco plants by using a single plasmid containing the cDNAs for both human RNase L and a low molecular weight form of human 2-5A synthetase under control of different, constitutive promoters. Expression of the human cDNAs in the transgenic plants was demonstrated from Northern blots, …

Molecular Diagnostics Of Three Diabrotica (Coleoptera: Chrysomelidae) Pest Species, Allen L. Szalanski, Thomas O. Powers

Department of Plant Pathology: Faculty Publications

A 257 bp region of the mitochondrial ND4 gene was analyzed for genetic variation in three species of corn rootworm, southern corn rootworm (Diabrotica undecim punctata howardi Barber, SCR), northern corn rootworm (D. barberi Smith and Lawrence, NCR), and western corn rootworm (D. virgifera virgifera LeConte, WCR). Nucleotide sequencing revealed 26 polymorphic sites. Genetic distances averaged 8% for all pair-wise comparisons among the three species. Restriction maps were constructed from sequence data and compared to potential species specific restriction sites. Polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) revealed three restriction enzymes (Alu I, Apo I …

United States Patent, Number: 5,466,788: Subgenomic Promoter, Paul G. Ahlquist, Roy C. French

Department of Plant Pathology: Faculty Publications

A subgenomic promoter of a positive strand RNA virus is disclosed which directs the amplified expression of a structural gene in plant tissue. The core region and an upstream activating domain of the subgenomic promoter are identified. This promoter can be utilized in a modified virus, or in an appropriate engineered recombinant DNA derivative, which may be chromosomally integrated or maintained as an episome in transformed cells.

Research On Plant Disease And Pest Management Is Essential To Sustainable Agriculture, R. James Cook, Clifford J. Gabriel, Arthur Kelman, Sue Tolin, Anne K. Vidaver

Department of Plant Pathology: Faculty Publications

In the United States, a country with food in great abundance, it is difficult to realize that, were it not for the current level of plant disease and pest management, most human resources would be needed to obtain enough food and other plant and animal products merely to survive. Instead, there are surpluses, markets for many agricultural products are depressed, and funds available for research on plant disease and pest management-and for agricultural research generally-have plateaued or are declining. Why does the United States need more research on plant disease and pest management? Because the health and productivity of the …

Research On Plant Disease And Pest Management Is Essential To Sustainable Agriculture, R. James Cook, Clifford J. Gabriel, Arthur Kelman, S. Tolin, Anne K. Vidaver

Department of Plant Pathology: Faculty Publications

In the United States, a country with food in great abundance, it is difficult to realize that, were it not for the current level of plant disease and pest management, most human resources would be needed to obtain enough food and other plant and animal products merely to survive. Instead, there are surpluses, markets for many agricultural products are depressed, and funds available for research on plant disease and pest management-and for agricultural research generally-have plateaud or are declining.

Why does the United States need more research on plant disease and pest management? Because the health and productivity of the …

Proceedings Of The 22nd Annual Meeting, Southern Soybean Disease Workers (February 20-22, 1995, St. Louis, Missouri), John Rupe, Brian M. Anderson, Robert P. Mulrooney, Gabe Sciumbato, Glenn G. Hammes

Southern Soybean Disease Workers: Conference Proceedings

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 …

Proceedings Of The 21st Annual Meeting, Southern Soybean Disease Workers (March 6-8, 1994, Tulsa, Oklahoma), Glenn Bowers, John Rupe, Brian M. Anderson, Gabe Sciumbato, Glenn G. Hammes

Southern Soybean Disease Workers: Conference Proceedings

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 …

Meloidogyne Javanica Parasitic On Peanut, E. K. Tomaszewski, M. A. M. Khalil, A. A. El-Deeb, Thomas O. Powers, J. L. Starr

Department of Plant Pathology: Faculty Publications

Peanut fields in four governorates of Egypt were surveyed to identify species of Meloidogyne present. Fourteen populations obtained from peanut roots were all identified as M. javanica based on perineal patterns, stylet and body lengths of second-stage juveniles, esterase phenotypes, and restriction fragment length polymorphisms of mtDNA. Three of 14 populations, all from contiguous fields in the Behara governorate, had individuals with a unique two-isozyme esterase phenotype. All populations of M. javanica tested on peanut had levels of reproduction on the M. arenaria-susceptible peanut cultivar Florunner that were not different from M. arenaria (P = 0.05), and had lower …

Identification And Characterization Of Aspergillus Nidulans Mutants Defective In Cytokinesis, Steven D. Harris, Jennifer L. Morrell, John E. Hamer

Department of Plant Pathology: Faculty Publications

Filamentous fungi undergo cytokinesis by forming crosswalls termed septa. Here, we describe the genetic and physiological controls governing septation in Aspergillus nidulans. Germinating conidia do not form septa until the completion of their third nuclear division. The first septum is invariantly positioned at the basal end of the germ tube. Block-and-release experiments of nuclear division with benomyl or hydroxyurea, and analysis of various nuclear division mutants demonstrated that septum formation is dependent upon the third mitotic division. Block-and-releasee xperiments with cytochalasin A and the localization of actin in germlings by indirect immunofluorescence showed that actin participated in septum formation. In …

Characterization Of Heterorhabditis Isolates By Pcr Amplification Of Segments Of Mtdna And Rdna Genes, Susan A. Joyce, Ann M. Burnell, Thomas O. Powers

Department of Plant Pathology: Faculty Publications

Restriction digests of amplified DNA from the mitochondrial genome and the nuclear ribosomal internally transcribed spacer region have been evaluated as genetic markers for species groups in Heterorhabditis. Six RFLP profiles have been identified. These profiles supported groupings determined by cross-breeding studies and were in agreement with less definitive groupings based on other biochemical and molecular methods. Digestion patterns of both amplification products provided strong evidence for the recognition of species groups, which include Irish, NW European, tropical, and a H. bacteriophora complex. The H. bacteriophora complex could be further resolved into three genotypes represented by H. zealandica, …

Effect Of Organic Matter Decomposition Level On Bacterial Species Diversity And Composition In Relationship To Pythium Damping-Off Severity, Michael J. Boehm, L.V. Mdden, H.A.J. Hoitink

Department of Plant Pathology: Faculty Publications

Rhizosphere bacteria were isolated from root tip segments of cucumber seedlings grown in a suppressive, slightly decomposed light-colored peat mix, a conducive, more decomposed dark-colored peat mix, and a suppressive dark peat mix amended with composted hardwood bark. The bacteria were identified by a gas chromatographic fatty acid methyl ester analysis. The total number of taxa recovered from a single root tip segment ranged from 9 to 18. No single taxon predominated on all root tip segments harvested from any of the mixes. The highest relative population density reached by a given taxon on any root tip segment was 45%. …

The Polymerase Chain Reaction And Plant Disease Diagnosis, Joan M. Henson, Roy C. French

Department of Plant Pathology: Faculty Publications

The polymerase chain reaction (PCR) provides a simple, ingenious method to exponentially amplify specific DNA sequences by in vitro DNA synthesis. Three essential steps to PCR (Figure 1) include (a) melting of the target (b) annealing of two oligonucleotide primers to the denatured DNA strands, and (c) primer extension by a thermostable DNA polymerase (123). Newly synthesized DNA strands serve as targets for subsequent DNA synthesis as the three steps are repeated up to 50 times. The specificity of the method derives from the synthetic oligonucleotide primers, which base-pair to and define each end of the target sequence to be …

Leptospira Genomes Are Modified At 5'-Gtac, David Ralph, Quideng Que, James L. Van Etten, Michael Mcclelland

Department of Plant Pathology: Faculty Publications

Genomic DNAs of 14 strains from seven species of the spirochete Leptospira were resistant to cleavage by the restriction endonuclease RsaI 1 (5'-GTAC). A modified base comigrating with m⁴C was detected by chromatography. Genomic DNAs from other spirochetes, Borrelia group VS461, and Serpulina strains were not resistant to h a 1 digestion. Modification at 5'-GTAm⁴C may occur in most or all strains of all species of Leptospira but not in all genera of spirochetes. Genus-wide DNA modification has rarely been observed in bacteria.

Evidence For Virus-Encoded Glycosylation Specificity, Ing-Nang Wang, Yu Li, Quideng Que, Meenakshi Bhattacharya, Leslie C. Lane, William G. Chaney, James L. Van Etten

Department of Plant Pathology: Faculty Publications

Four spontaneously derived serologically distinct classes of mutants of the Paramecium bursaria chlorella virus (PBCV-1) were isolated using polydonal antiserum prepared against either intact PBCV-1 or PBCV-1-derived serotypes. The oligosaccharide(s) of the viral major capsid protein and two minor glycoproteins determined virus serological specificity. Normally, viral glycoproteins arise from host-specific glycosylation of viral proteins; the glycan portion can be altered only by growing the virus on another host or by mutations in glycosylation sites of the viral protein. Neither mechanism explains the changes in the glycan(s) of the PBCV-1 major capsid protein because all of the viruses were grown in …

Proceedings Of The 20th Annual Meeting, Southern Soybean Disease Workers (March 28-30, 1993, Fort Walton Beach, Florida), Patrick D. Colyer, Glenn R. Bowers Jr., John C. Rupe, Brian M. Anderson, Glenn G. Hammes

Southern Soybean Disease Workers: Conference Proceedings

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 …

The Future Of Agricultural Research, Roger Beachy, Susanne L. Huttner, Anne K. Vidaver

Department of Plant Pathology: Faculty Publications

We enthusiastically support Philip H. Abelson’s call for substantially increased funding for basic agricultural research (Editorial, 28 Aug., p. 1187). However, he neglects the government’s critical role as gatekeeper; some federal regulatory policies are serious impediments to progress in the agricultural sciences. A subsequent editorial by Charles Arntzen, “Regulation of transgenic plants’ (4 Sept., p 1327), points out that research on genetically engineered plants is now subject to delays and extensive assessments that result from perceptions of public concern and not from scientific evidence of risk. when government’s research and regulatory policies conflict, the public loses twice-their investment in the …

Sequencing Two Dna Templates In Five Channels By Digital Compression, Michaela Nelson, Yanping Zhang, David L. Steffens, Reingard Grabherr, James L. Van Etten

Department of Plant Pathology: Faculty Publications

By applying algebraic coding methods to the Sanger dideoxynucleotide procedure, DNA sequences of two templates can be determined simultaneousl in only flve reactions and data channels. A 5:2 data compression is accomplished by instantaneous source coding of nucleotide sequence pairs into one set of 5-bit block codes. A general algebraic expression, 2" - 1 ≥ 4^f, describes conditions under which f DNA templates can be sequenced using n channels. Such compression sequencing is accurate and effcient, as demonstrated by manual ³⁵S autoradiographic detection and automated on-line analysis using fluorescent-labeled primers. Symmetric 5:2 compression is especially useful when …

Mitochondrial Dna Sequence Divergence Among Meloidogyne Incognita, Romanomermis Culicivorax, Ascaris Suum, And Caenorhabditis Elegans, Thomas O. Powers, T. S. Harris, B. C. Hyman

Department of Plant Pathology: Faculty Publications

Mitochondrial DNA sequences were obtained from the NADH dehydrogenase subunit 3 (ND3), large rRNA, and cytochrome b genes from Meloidogyne incognita and Romanomermis culicivorax. Both species show considerable genetic distance within these same genes when compared with Caenorhabditis elegans or Ascaris suum, two species previously analyzed. Caenorhabditis, Ascaris, and Meloidogyne were selected as representatives of three subclasses in the nematode class Secernentea: Rhabditia, Spiruria, and Diplogasteria, respectively. Romanomermis served as a representative outgroup of the class Adenophorea. The divergence between the phytoparasitic lineage (represented by Meloidogyne) and the three other species is so great that virtually …

A Polymerase Chain Reaction Method For Identification Of Five Major Meloidogyne Species, Thomas O. Powers, T. S. Harris

Department of Plant Pathology: Faculty Publications

A polymerase chain reaction (PCR) method for discriminating Meloidogyne incognita, M. arenaria, M. javanica, M. hapla, and M. chitwoodi was developed. Single juveniles were ruptured in a drop of water and added directly to a PCR reaction mixture in a microcentrifuge tube. Primer annealing sites were located in the 3' portion of the mitochondrial gene coding for cytochrome oxidase subunit II and in the 16S rRNA gene. Following PCR amplification, fragments of three sizes were detected. The M. incognita and M. javanica reactions produced a 1.7-kb fragment; the M. arenaria reaction, a 1.1-kb fragment; and the …

Molecular Approaches For Control Of Tomato Bushy Stunt Virus, H. B. Scholthof, M. Borja, Thomas Jack Morris, A. O. Jackson

School of Biological Sciences: Faculty Publications

I N this overview strategies are discussed that are currently being tested in our laboratory in an effort to engineer resistance against tomato bushy stunt virus (TBSV) in plants. TBSV is chosen as a model-system since this is an economically important RNA virus that is well characterized at the molecular level and the virus has some interesting and potentially useful features that can be exploited to produce resistant plants. Moreover, we anticipate that the information derived from our studies with TBSV will be applicable in developing resistance to other plant viruses. Some approaches that we are attempting to apply to …

Book Review: Genetically Engineered Organisms: Benefits And Risks, Anne K. Vidaver

Department of Plant Pathology: Faculty Publications

In the continuing debate on the introduction into the environment of genetically modified organisms, particularly those modified by recombinant DNA, there are few books suitably written for policymakers, the lay public and scientists in other fields. This book describes the current state of the science and art of genetic engineering, potential uses (particularly outside the laboratory), and the benefits that can be expected. It is particularly pertinent for examining potential risk and management of risk from the perspective of the United Kingdom.

Proceedings Of The 19th Annual Meeting, Southern Soybean Disease Workers (February 19-20, 1992, St. Louis, Missouri), J. Allen Wrather, Patrick D. Colyer, Glenn R. Bowers Jr., Brian M. Anderson, Glenn G. Hammes

Southern Soybean Disease Workers: Conference Proceedings

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 …

Viruses And Virus-Like Particles Of Eukaryotic Algae, James L. Van Etten, Leslie C. Lane, Russel H. Meints

Department of Plant Pathology: Faculty Publications

TABLE OF CONTENTS:
INTRODUCTION
CHARACTERISTICS OF CHLORELLA SPECIES
General Properties of Chlorella Species
Symbiotic Chlorella Species
Chlorella Strains NC64A, Nla, Pbi, and SAG-241-80
DISCOVERY OF CHLORELLA VIRUSES
Initial Observations
Development of a Culturable System for PBCV-1
PROPERTIES OF CHLORELLA VIRUSES
General Characteristics of PBCV-1
Composition of PBCV-1
PBCV-1 Genome
Serology of PBCV-1
Additional Chlorella Strain NC64A Viruses
Viruses Infecting Chlorella Strain Pbi
REPLICATION OF PBCV-1
Attachment of PBCV-1 to Chlorella Strain NC64A
Intracellular Site of PBCV-1 Replication
Effect of PBCV-1 Infection on Host DNA, RNA, and Protein Syntheses
TRANSCRIPTION OF PBCV-1
VIRUSES ENCODE DNA METHYLTRANSFERASES AND DNA SITE-SPECIFIC (RESTRICTION) ENDONUCLEASES …

Regulation Of Biotechnology, Henry I. Miller, Robert H. Burris, Anne K. Vidaver

Department of Plant Pathology: Faculty Publications

Greg Simon (Letters, 3 May, p. 629) makes the case that only federal regulation of releases of agricultural products will address health and safety concerns. Such a view is hardly surprising, since he drafted the federal statute for the comprehensive regulation of field research with recombinant DNA-manipulated organisms. The basic assumptions of this statute were contrary to those contained in the reports of the National Academy of Sciences (NAS) (1) and the National Research Council (NRC) (2) and also to the existing policies of government research and regulatory agencies. The statute would have regulated only those organisms that were manipulated …

Proceedings Of The 18th Annual Meeting, Southern Soybean Disease Workers (March 20-21, 1991, Lexington, Kentucky): National Perspective On Soybeans, Donald E. Hershman, J. Allen Wrather, Patrick D. Colyer, Gary W. Lawrence, Glenn G. Hammes

Southern Soybean Disease Workers: Conference Proceedings

Contents

General session

Presidential address. DE Hershman

Keynote address. P O'Connell

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 …