Diversity and Aggressiveness of the Species Complex on Sunflower in Serbia.

This study aimed to investigate the species associated with Phomopsis stem canker of sunflower ( L.) in Serbia. The significant increase in sunflower and soybean ( [L.

No Common Candidate Genes for Resistance to , , , and in Soybean Accessions from Maturity Groups 0 and I: Findings from Genome-wide Association Mapping.

Seedling diseases and root rot, caused by species of , can limit soybean ( L.) production in the United States. Currently, there are few commercially available cultivars resistant to .

Effect of Fungicide and Timing of Application on Management of Phoma Black Stem of Cultivated Sunflowers in the United States.

Phoma black stem (PBS), caused by Boerema (teleomorph Frezzi), is the most common stem disease of sunflower ( L.) in the northern Great Plains region of the United States. However, the impact of PBS on sunflower yield in the United States is unclear, and a near complete absence of information on the impact of fungicides on disease management exists.

Impact of Foliar Fungicide Application on the Culturable Fungal Endophyte Community of Soybean Seed in the Midwest United States.

The purpose of our study was to determine whether the application of quinone outside inhibitor (QoI) and pyrazole-carboxamide fungicides as a tank mix would impact the endophyte community of soybean seed. Field trials during 2018 in Iowa, South Dakota, and Wisconsin, U.S.

Foliar Fungicides Containing FRAC 11 Mitigate Phomopsis Stem Canker in Sunflower ().

Phomopsis stem canker reduces yield of sunflower ( L.) up to or exceeding 40%; however, management recommendations have not been developed for U.S.

Genome-Wide Association Mapping in Sunflower () Reveals Common Loci and Putative Candidate Genes for Resistance to and Causing Phomopsis Stem Canker.

and cause Phomopsis stem canker of sunflower ( L.) in the United States. Because Phomopsis stem canker did not gain importance until the disease epidemic in 2010, limited studies were conducted to understand the genetic basis of sunflower resistance to and .

Diaporthe Seed Decay of Soybean [ (L.) Merr.] Is Endemic in the United States, But New Fungi Are Involved.

Diaporthe seed decay can compromise seed quality in soybean [ (L.) Merr.] in the warm and humid production areas of the United States during crop maturation.

Relationship Between Sudden Death Syndrome caused by and Soybean Yield: A Meta-Analysis.

In total, 52 uniform field experiments were conducted in Illinois, Indiana, Iowa, Michigan, South Dakota, and Wisconsin in the United States and Ontario, Canada from 2013 to 2017 comparing crop protection products against sudden death syndrome (SDS) of soybean. Data were analyzed using meta-analytic models to summarize the relationship between foliar disease index (FDX) and yield. For each study, correlation and regression analyses were performed separately to determine three effect sizes: Fisher's transformation of correlation coefficients ( ), intercept (β), and slope (β).

Quantitative PCR Assays Developed for and for Phomopsis Stem Canker Diagnosis and Germplasm Screening in Sunflower ().

Phomopsis stem canker of sunflower is caused by two fungal pathogens, and , in the United States. In this study, two quantitative PCR (qPCR) assays were developed to detect and quantify and in sunflower. The two assays differentiated the two fungi from each other, other species of the genus , and pathogens, and they have high efficiency (>90%).

Molecular Basis of Soybean Resistance to Soybean Aphids and Soybean Cyst Nematodes.

Soybean aphid (SBA; Matsumura) and soybean cyst nematode (SCN; Ichninohe) are major pests of the soybean ( [L.] Merr.).

Transcriptome profiling of interaction effects of soybean cyst nematodes and soybean aphids on soybean.

Soybean aphid (Aphis glycines; SBA) and soybean cyst nematode (Heterodera glycines; SCN) are two major pests of soybean (Glycine max) in the United States of America. This study aims to characterize three-way interactions among soybean, SBA, and SCN using both demographic and genetic datasets. SCN-resistant and SCN-susceptible soybean cultivars with a combination of soybean aphids (biotype 1) and SCN (HG type 0) in a randomized complete block design (RCBD) with six blocks were used to evaluate the three-way interactions in a greenhouse setup.

Effect of Seed Treatment and Foliar Crop Protection Products on Sudden Death Syndrome and Yield of Soybean.

Sudden death syndrome (SDS), caused by , is an important soilborne disease of soybean. Risk of SDS increases when cool and wet conditions occur soon after planting. Recently, multiple seed treatment and foliar products have been registered and advertised for management of SDS but not all have been tested side by side in the same field experiment at multiple field locations.

Inoculation Method Impacts Symptom Development Associated with Diaporthe aspalathi, D. caulivora, and D. longicolla on Soybean (Glycine max).

One hundred fifty-two Diaporthe isolates were recovered from symptomatic soybean (Glycine max) stems sampled from the U.S. states of Iowa, Indiana, Kentucky, Michigan, and South Dakota.

Benefits and Profitability of Fluopyram-Amended Seed Treatments for Suppressing Sudden Death Syndrome and Protecting Soybean Yield: A Meta-Analysis.

A meta-analytic approach was used to summarize data on the effects of fluopyram-amended seed treatment on sudden death syndrome (SDS) and yield of soybean (Glycine max L.) in over 200 field trials conducted in 12 U.S.

Evolutionary Divergence of TNL Disease-Resistant Proteins in Soybean (Glycine max) and Common Bean (Phaseolus vulgaris).

Disease-resistant genes (R genes) encode proteins that are involved in protecting plants from their pathogens and pests. Availability of complete genome sequences from soybean and common bean allowed us to perform a genome-wide identification and analysis of the Toll interleukin-1 receptor-like nucleotide-binding site leucine-rich repeat (TNL) proteins. Hidden Markov model (HMM) profiling of all protein sequences resulted in the identification of 117 and 77 regular TNL genes in soybean and common bean, respectively.

Optimization and Application of a Quantitative Polymerase Chain Reaction Assay to Detect Diaporthe Species in Soybean Plant Tissue.

Diaporthe caulivora and D. longicolla are the causal agents of stem canker of soybean (Glycine max L.).

Phomopsis Stem Canker: A Reemerging Threat to Sunflower (Helianthus annuus) in the United States.

Phomopsis stem canker causes yield reductions on sunflower (Helianthus annuus L.) on several continents, including Australia, Europe, and North America. In the United States, Phomopsis stem canker incidence has increased 16-fold in the Northern Great Plains between 2001 and 2012.

Characterization of Fusarium secorum, a new species causing Fusarium yellowing decline of sugar beet in north central USA.

This study characterized a novel sugar beet (Beta vulgaris L.) pathogen from the Red River Valley in north central USA, which was formally named Fusarium secorum. Molecular phylogenetic analyses of three loci (translation elongation factor1α, calmodulin, mitochondrial small subunit) and phenotypic data strongly supported the inclusion of F.