Proceedings of the 42nd Annual Meeting, Southern Soybean Disease Workers (March 11-12, 2015, Pensacola Beach, Florida)

Contents Schedule Southern United States Soybean Disease Loss Estimates for 2014. TW Allen, JP Damicone, NS Dufault, TR Faske, DE Hershman, CA Hollier, T Isakeit, RC Kemerait, NM Kleczewski, SR Koenning, HL Mehl, JD Mueller, C Overstreet, P Price, EJ Sikora, and H Young Graduate student competition (Trey Price, moderator) Effect of Secondary Nutrient Applications on Suppression of Charcoal Rot in Soybean. T Wilkerson, M Tomasu-Peterson, BR Golden, S Lu, AB Johnson, and TW Allen Molecular Characterization of the G143A Mutation Leading to QoI Fungicide Resistance among Fungal Pathogens Causing Cercospora Leaf Blight and Purple Seed Stain of Soybean. S Albu, P Price, V Doyle, and RW Schneider The Effects of Starter Fertilizer on Soybean Infected with Fusarium virguliforme or Rhizoctonia solani. J Miller, C Vick, A Vick, and J Bond Root-knot Nematodes (Meloidogyne spp.) Associated with Soybean in Arkansas. C Khanal, RT Robbins, C Overstreet, and EC McGawley Tillage, Fungicide, and Cultivar Effects on Frogeye Leaf Spot Severity and Yield in Soybean. J Jordan, A Mengistu, HM Kelly, N Bellaloui, PR Arelli, KN Reddy, and AJ Wrather Frogeye Leaf Spot Response to Solo and Combination Fungicides. AM Cochran, HM Kelly, K Lamour, and C Bradley A New Perspective on Cercospora Leaf Blight Symptoms on Soybean. EC Silva, TG Garcia, AV Lygin, AK Chanda, CL Robertson, BM Ward, and RW Schneider Using a Hill Plot Technique for Evaluating Soybean Varieties for Resistance to Sudden Death Syndrome. J Padgett, A Vick, C Vick, C Schmidt, and J Bond Evaluating the Resistance of Some Soybean Varieties/Cultivars on Reniform Isolates from Louisiana. MT Kularathna, C Overstreet, EC McGawley, and DM Xavier Investigating Fungicide Sensitivities Beyond the QoIs in Cercospora sojina from Mississippi. JR Standish, M Tomaso-Peterson, TW Allen, S Sabanadzovic, and N Aboughanem-Sabanadzovic Using Fluopyram as a Seed Treatment to Reduce Sudden Death Syndrome in Resistant and Susceptible Soybean Varieties. D Esker, C Vick, A Vick, and J Bond Glyphosate Affects Cercospora Leaf Blight and Brown Spot of Soybean. TG Garcia, EC Silva, BM Ward, CL Robertson, R Levy, and RW Schneider Efficacy of Seed Treatments for Management of Fusarium virguliforme and Heterodera glycines. N Frederking, A Fakhoury, J Bond Minor Element Application as a Management Strategy for Soybean Rust and Cercospora Leaf Blight. BM Ward, CL Robertson, EC Silva, TG Garcia, and RW Schneider Management of Frogeye Leaf Spot and Determining the Impact of Fungicide Phytotoxicity in Mississippi Soybean. WJ Mansour, JT Irby, BR Golden, TH Wilkerson, and TW Allen Contributed papers (Heather Kelly, moderator) Soybean Disease Management Issues in Louisiana During 2014. P Price, MA Purvis, and HN Pruitt Soybean Vein Necrosis Virus in Mississippi N. Aboughanem-Sabanadzovic, S. Sabanadzovic. TW Allen, WF Moore, and RC Stephenson Monitoring for Soybean Vein Necrosis Virus in Alabama (2014). E Sikora, K Conner, and L Zhang Challenges and Opportunities in the Use of Molecular Tools to Detect Strobilurin/QoI Fungicide Resistance: The Case of Frogeye Leaf Spot. H Kelly and B Vega An Update of Research on Phomopsis Seed Decay in Soybean. S Li, J Rupe, P Chen, G Shannon, and G Sciumbato Assessment of Several Commercially Available Triazole and Premix Fungicides for Management of Frogeye Leaf Spot in Arkansas. TR Faske and M Emerson ILeVO® Seed Treatment for Control of SDS and Nematodes in Soybeans. C Graham Use of Random Point Assignments to Determine the Impact of Sudden Death Syndrome and Other Soilborne Diseases. T Spurlock and W Kirkpatrick Effect of Planting Date, Planting Density, Seed Treatment, and Seed Quality on Soybean Stand and Yield in Arkansas. JC Rupe, AJ Steger, RT Holland, CS Rothrock, EE Gbur, Jr, WJ Ross, and MP Popp 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 authors. The opinions expressed by the participants at this conference are their own and do not necessarily represent those of the Southern Soybean Workers. Mention of a trademark or proprietary products in this publication does not constitute a guaran-tee, warranty, or endorsement of that product by the Southern Soybean Disease Workers

Simulating magnetized neutron stars with discontinuous Galerkin methods

Discontinuous Galerkin methods are popular because they can achieve high order where the solution is smooth, because they can capture shocks while needing only nearest-neighbor communication, and because they are relatively easy to formulate on complex meshes. We perform a detailed comparison of various limiting strategies presented in the literature applied to the equations of general relativistic magnetohydrodynamics. We compare the standard minmod/Lambda Pi(N) limiter, the hierarchical limiter of Krivodonova, the simple WENO limiter, the HWENO limiter, and a discontinuous Galerkin-finite-difference hybrid method. The ultimate goal is to understand what limiting strategies are able to robustly simulate magnetized Tolman-Oppenheimer-Volkoff stars without any fine-tuning of parameters. Among the limiters explored here, the only limiting strategy we can endorse is a discontinuous Galerkin-finitedifference hybrid method

SpECTRE

<p>SpECTRE is an open-source code for multi-scale, multi-physics problems in astrophysics and gravitational physics. In the future, we hope that it can be applied to problems across discipline boundaries in fluid dynamics, geoscience, plasma physics, nuclear physics, and engineering. It runs at petascale and is designed for future exascale computers.</p> <p>SpECTRE is being developed in support of our collaborative Simulating eXtreme Spacetimes (SXS) research program into the multi-messenger astrophysics of neutron star mergers, core-collapse supernovae, and gamma-ray bursts.</p&gt