SAES-422 Multistate Research Activity Accomplishments Report

Status: Approved

Basic Information

  • Project No. and Title: NCERA212 : Soybean Diseases
  • Period Covered: 10/01/2009 to 10/01/2010
  • Date of Report: 04/01/2011
  • Annual Meeting Dates: 03/09/2011 to 03/10/2011

Participants

Administrative Advisor: Dr. Steven Slack OARDC The Ohio State University 1680 Madison Ave. Wooster, OH 44691 Chair: Dr. Carl Bradley Department of Crop Sciences University of Illinois 1102 S. Goodwin Ave. Urbana, IL 61801 Secretary: Dr. Leonor Leandro Department of Plant Pathology Iowa State University 351 Bessey Hall Ames, IA 50010 Members and guests in attendance: Carl Bradley (Univ. Illinois), Leonor Leandro (Iowa State Univ.), Paul Esker (Univ. Wisconsin), Doug Jardine (Kansas State Univ.), Anne Dorrance (Ohio State Univ.), Kiersten Wise (Purdue Univ.), Daren Mueller (Iowa State Univ.), Steven Slack (Ohio State Univ.), Berlin Nelson (North Dakota State Univ.), X. B. Yang (Iowa State Univ.), Don Hershman (Univ. Kentucky), Glen Hartman (USDA-ARS, Urbana, IL), Dean Malvick (Univ. Minnesota), Martin Chilvers (Michigan State Univ.), Loren Giesler (Univ. Nebraska), Albert Tenuta (Ontario Ministry of Agriculture, Food and Rural Affairs), David Wright (Iowa Soybean Association/North Central Soybean Research Program), Laura Sweets (Univ. Missouri), Tom Allen (Mississippi State Univ.), Ed Sikora (Auburn Univ.), Tom Chase (South Dakota Univ.), Boyd Padgett (Louisiana State Univ.), Lijuan Xing (Syngenta Seeds), Richard Joost (United Soybean Board/SmithBucklin), Jason Bond (Southern Illinois Univ.), and Clayton Hollier (Louisiana State Univ.).

The meeting of the NCERA 212: Soybean Diseases Committee was held at the Hilton Pensacola Beach Gulf Front Hotel, March 9, 2011. The meeting was held in conjunction with the Southern Soybean Disease Workers (SSDW) meeting. The meeting was called to order at 7:45 am by Chair, Carl Bradley (Univ. Illinois). The meeting began with introductions of everyone in attendance. Steve Slack called in at 7:45 am and provided information about the Federal budget. FY2011 should have started in October 2010 but has not yet been approved. There are current discussions in the House and Senate about the FY2011 and FY2012 budgets. The potential outcomes are unknown. There could be a continuing budget or reconciliation of budgets. Because of the large change in Congress last November, negotiations are ongoing for determine the budget value. The new House is focused on going back to 2008 levels of funding, which represents a significant difference in base funding that supports hatch and Smith-Lever extension lines. Steve stated that he continued to be very pleased with the activity of the NCERA 212 program. Every state that has a history in the committee continues to be represented. It is important that we continue to have interaction with the SSDW and other groups. We should keep developing the annual reports and spend time reporting on the impact of the committee. The annual report needs to be submitted by 1st week of April. Anne Dorrance asked what kinds of numbers would work best for the impact statement of the committee. Steve responded that we should give an idea of the numbers of acres of soybeans and the impact of the group on those acres. Anne Dorrance suggested making state reports voluntary during our meeting so that we could spend time discussing the budget and other topics. Leonor Leandro agreed to send a PDF file with all reports by email to the group. Brief oral reports were given on the crop and disease situation in each state. In addition to the oral reports, some states also provided a written report. Brief summaries of these oral and written state reports are provided below. Complete reports for each state can be found in the PDF attachment. Carl Bradley called the official business meeting to order: " Carl Bradley motioned to accept the minutes from 2010. It was seconded by Glen Hartman, and approved by all. " Nominations for the NCERA 212 secretary for 2012 (chair for 2013) were opened. Tom Allen nominated Kiersten Wise, Anne Dorrance seconded the motion. The nominations were closed, and Kiersten Wise was unanimously elected as the secretary of NCERA 212 for 2012 and chair for 2013. " Carl Bradley motioned to close nominations, it was seconded by Loren Giesler, and approved unanimously. " Plans for the 2011 meeting were discussed. Glen Hartman and Carl Bradley suggested meeting with the SSDW group again. Berlin Nelson thought it was important to set aside a full day for NCERA meeting to discuss research projects and other topics of interest. Loren Giesler agreed. " Carl motioned to meet with the SSDW with a full day to meet as the NCERA 212, it was seconded by Doug Jardine, and approved unanimously. Other meeting opportunities were discussed. " Tom Chase proposed to host an online conference to allow communication between group members during the growing season. The goal is to notify the group of disease onset and progress in each state. The conference will be hosted by SDSU. " Dean Malvick discussed the possibility of meeting in the last week of August in Wisconsin with the soybean group that usually met to discuss Phytophthora and Sclerotinia diseases. An internet connection option was discussed for those who cannot attend the meeting. " Berlin Nelson suggested the organization of a mini-symposium offered by the NCERA 212 in the 2013 joint meeting with the soybean breeders. This will require communication between the breeders meeting organizer and the chair of NCERA 212. Symposium topics discussed included fungicide resistance (Anne Dorrance) and the effects of roundup on diseases (Daren Mueller). Glen Hartman reported on the progress with the preparation of the new edition of the soybean disease compendium and requested submission of good disease images. An online version of the compendium will be available. Berlin Nelson reported on an emerging issue from APS. The industry relations committee has requested training for their employees because they are hiring agriculture majors that have no field experience. These industry employees need certifications in plant pathology. APS would like to tap into the current education programs. Kiersten Wise said that Purdue University already offers this type of training. Loren Giesler said that the University of Nebraska has a Doctor of Plant Health degree. Companies need broadly trained plant pathologists and we are not producing them. Kiersten Wise provided background information about the claims of disease increases and health concerns due to glyphosate applications. To date there is no scientific data to support the claims. The group showed concern that claims are being disseminated via public press, instead of research data being published in scientific journals. Scientific data is needed before any conclusions are made about the possible effects of glyphosate. Kiersten Wise and Anne Dorrance both wrote online articles to clarify the facts on the topic. Anne Dorrance commented that one major restriction to research is the lack of free access to soybean isolines. Anne suggested writing a letter to Monsanto to explain that their restrictions on using plant material for research are preventing hypothesis testing on the topic. The group thanked Kiersten and Anne for writing scientific articles to help answer grower questions. David Wright stated that the article answered many questions from the soybean board members. Growers were starting to change practices in response to non-scientifically validated claims. Anne Dorrance (Ohio St. University) led a discussion on the preparation of impact statements for the NCERA 212. The group agreed to work together on a list of accomplishments to include in the annual report. Carl Bradley called the meeting to adjourn: " The group thanked David Wright for the NCSRP funding that covered the costs of the meeting. " The group motioned to recognize Tom Allen for local arrangements of the meeting. " The group thanked Carl Bradley for his efforts in organizing the meeting. " The meeting was adjourned at 11:20 am on March 9, 2011. " The NCERA 212 met jointly with SSDW in the afternoon of March 9 and for a full day on March 10, 2011. NCERA 212 Impact Statement: Soybean production continues to play a prominent role in US agriculture. It is the number one crop in terms of harvested acres in several North Central states and second only to corn in value of production. The 2010 cash market value of soybeans increased 32 percent from 29.5 billion to 38.9 billion dollars. With rising production value, new markets for green energy, and soybean oil replacing crude oil in industrial processes, there is a greater demand to improve yield and quality. Soybean yields have remained steady since 2002, with average yields of 43.3 and 43.5 bu/A reported for 2009 and 2010, respectively (USDA Crop Production Report, Feb 2011). The frequency and spread of soybean diseases has played a role in these stagnant yields in several production areas within the North Central region. Our mission The NCERA 212 Committee monitors the development of soybean diseases and directs science-based information to breeders and agricultural companies across the US. The committee has a system of rapid exchange of information about current and emerging pathogen issues that helps mitigate yield losses and assists growers and companies in cost savings.

Accomplishments

1. Foster collaborative research and information exchange on soybean diseases among scientists in the north central region including soybean breeders and entomologists that will lead to improved disease screening protocols, additional sources of disease resistance genes and ultimately, improved host plant resistance. Accomplishments for objective 1: a) The 2011 NCERA 212 meeting was held in conjunction with the Southern Soybean Disease Workers (SSDW). Meeting jointly with the southern soybean scientists improved the exchange of information and ideas, which helped foster collaborative research projects. b) Members of NCERA 212 participated in the planning of the 2012 joint meeting with the SSDW and (possibly) the nematology committee. This meeting will allow the exchange of information across university scientists, industry personnel, and producers, which will ultimately help improve management of diseases. c) Members of the NCERA 212 agreed to collaborate in an online conference to allow communication between group members during the growing season. d) Discussion at the 2011 NCERA 212 meeting may lead to the planning of additional soybean disease meetings. 2. Evaluate the impacts of changing production practices such as earlier planting dates, new sources of host plant resistance, increased use of fungicide seed treatments and foliar fungicides, and other new or improved crop production technologies on soybean diseases. Accomplishments for objective 2 a) Members of the NCERA 212 are working collaboratively to evaluate the effectiveness of seed treatments and fungicide applications against soybean pathogens. b) Discussions were initiated to develop a soybean fungicide publication in collaboration with SSDW and NCERA 208 (soybean rust working group). This will be led by Daren Mueller (Iowa State), Kiersten Wise (Purdue) and Nick Dufault (Florida). This publication will replace the national Soybean Rust Compendium. c) Carl Bradley (Illinois) summarized his work with members of SSDW group to identify baseline sensitivities of soybean pathogens to fungicides. This is to establish a fungicide resistance screen for pathogens such as Cercospora sojina. In 2010, fungicide resistance was identified in strains of Cercospora sojina in Tennessee, Kentucky and southern Illinois. Discussion on the implications of these finds and future research were beneficial for both NCERA 212 and SSDW members. d) Leonor Leandro led a discussion on how Iowa experienced the perfect storm in 2010 for sudden death syndrome. Discussion included how early planting followed by cool temperatures and mid-season rainfall (second highest in last 125+ years) led to unprecedented levels of SDS. e) Dean Malvick summarized a study on Fusarium pathogens in Minnesota. 3. Develop research projects to study the ecology and epidemiology of soybean diseases important in the north central region. Accomplishments for objective 3 a) NCERA 212 members are working collaboratively on on-going multi-state research projects focused on sudden death syndrome, soybean cyst nematode, soybean rust, frogeye leaf spot, and charcoal rot. b) A multi-state research/extension project focused on root rot pathogens is being developed by NCERA 212 members. 4. Improve knowledge transfer about soybean diseases and their management in the North Central Region to researchers, Extension faculty, producers and the agribusiness community through the use of web sites, podcasts and other new technologies as they are developed. Accomplishments for objective 4 a) Members of the NCERA 212 completed revisions of the Soybean Disease White Paper. The revised white paper will be posted onto the Plant Health Initiative website (http://planthealth.info) so that it can be openly accessible. b) Members of NCERA 212 participated in developing new webcasts for the Focus on Soybean section of the Plant Management Network (www.plantmanagementnetwork.com). New or updated webcasts for 2010 developed by NCERA 212 members include: - Soybean Cyst Nematode Varieties - Terry Niblack, University of Illinois, September 2010 - Bean Pod Mottle Virus - John Hill, Iowa State University, August 2010 - Impacts of Subsurface Drainage in Corn-Soybean Rotations - Matt Helmers, Iowa State University, August 2010 - Benefits and Utility of Bedding Systems for Improved Productivity and Profitability of Soybean Production in the Mid-South U.S. - Trey Koger, Mississippi State University, August 2010 - Soybean Aphid Scouting - Kelley Tilmon, South Dakota State University, July 2010 - Soybean Growth Stages - Trey Koger, Mississippi State University, June 2010 - Soybean White Mold (Sclerotinia Stem Rot) - Paul Esker, University of Wisconsin-Madison, May 2010 - Bean Leaf Beetle in Soybean - Erin Hodgson, Iowa State University, March 2010 - Double Cropped Soybeans in the South - David L. Wright, University of Florida, March 2010 - Glyphosate Stewardship for Soybeans - Chris Boerboom, University of Wisconsin-Madison, February 2010 - Principles of Nematode Management in the Southern U.S. - John Mueller, et al; Clemson University, North Carolina State University, and University of Arkansas; January 2010 - How to Maximize Soybean Yield - Palle Pedersen, Iowa State University, January 2010 - Benefits and Utility of Bedding Systems for Improved Productivity and Profitability of Soybean Production in the Mid-South U.S. - Trey Koger, Mississippi State University, November 2009 5. Continue to monitor for any new or reemerging pathogens of soybean in the north central region and develop appropriate responses to their emergence as they occur. Accomplishments for objective 5 a) Members of NCERA 212 worked together to evaluate the soybean rust pest information platform for extension and education (PIPE) public websites impact on certified crop advisers. b) Regional surveys of the presence and distribution of important diseases of soybean were concluded, and new surveys were started. c) Monitoring for fungicide-resistant C. sojina isolates will be an emphasis for the NCERA 212 group in 2011.

Impacts

  1. Fostered collaborative research and information exchange by bringing 56 number of soybean pathologists together at a joint meeting of the Southern Soybean Disease Workers and the NCERA-212 Soybean Disease Committee.
  2. Actively collaborated in research projects focused on sudden death syndrome, soybean cyst nematode, soybean rust, frogeye leaf spot, scelotinia stem rot, and charcoal rot. These multi-state collaborative projects generated approximately 1.2 million dollars in research and extension support toward the improvement of soybean plant health. Results from these projects will ultimately improve the knowledge base of the soybean pathogens and diseases, which will improve disease management and soybean production.
  3. Prepared a revised version of the Soybean Disease White Paper. The white paper outlines research needed to assist in the development of high yielding, disease resistant varieties that will reduce yield losses to pathogens. This white paper will be used to identify national research needs for the North Central Soybean Research Program, United Soybean Board, state soybean checkoff boards and the USDA.
  4. Developed new webcasts for the Focus on Soybean section of the Plant Management Network. This site received 10,965 unique visitors in 2010. (http://www.plantmanagementnetwork.org/infocenter/topic/focusonsoybean/ ).
  5. Conducted regional surveys of the presence and distribution of important diseases of soybean that will impact grower decisions about soybean production practices and provide early warnings about emerging disease threats to soybean production. Early warnings will focus extension efforts on preventing yield losses through implementation of appropriate disease management practices.
  6. Identified strobilurin fungicide resistance in Cercospora sojina. This discovery will impact how producers manage frogeye leaf spot with fungicides by limiting their choices of products to those in the triazole family of fungicides. This discovery may also influence fungicide selection by soybean (and corn) growers by increasing awareness of the risks of fungicide-resistant pathogens.
  7. Coordinated a comprehensive effort on pathogen diagnostics. The national plant diagnostic network (www.npdn.org) allows for rapid responses to the identification of new or re-emerging pathogens in a region by focusing education efforts on yield loss mitigation.
  8. Developed education programs that resulted in savings for farmers and the regional economy. These educational programs included fungicide stewardship, management of important diseases such as SDS and white mold, managing SCN using host-plant resistance and proper use of fungicide seed treatments. Educating growers about soybean disease cycles saved an average of $25 per acre by reducing unnecessary pesticides applications when environmental conditions were unfavorable for disease (eg. white mold) or when fungicide applications are ineffective against disease (eg. SDS).
  9. Evaluated effectiveness of seed treatments and fungicide application, resulting in recommendations to help growers get maximum returns. Growers maximized returns by selecting the most effective fungicides when disease was present and saving $25/acre when spraying was unnecessary.
  10. Contributed to a steady increase in soybean yields resulting from resistance breeding efforts by developing improved screening methods and increasing the knowledge base on soybean pathogens.

Publications

Refereed Publications: 1. Bienapfl, J. C., Malvick, D. K., and Percich, J. A. 2010. First report of Fusarium redolens causing root rot of soybean in Minnesota. Plant Disease 94:1069. 2. Bradley, C. A., Allen, T. W., Dorrance, A. E., Dunphy, E. J., Giesler, L. J., Hershman, D. E., Hollier, C. A., Horn, V., and Wrather, J. A. 2010. Evaluation of the soybean rust pest information platform for extension and education (PIPE) public websites impact on certified crop advisers. Online. Plant Health Progress doi:10.1094/PHP-2010-0701-RS. 3. Bradley, C. A., Hines, R. A., Pataky, N. R., Haudenshield, J. S., and Hartman, G. L. 2010. First report of soybean rust caused by Phakopsora pachyrhizi on kudzu (Pueraria montana var. lobata) in Illinois. Plant Disease 94:477. 4. Buck, J. W., Dong, W., Mueller, D. S. 2010. Effect of light exposure on in vitro germination and germ tube growth of eight species of rust fungi. Mycologia. 102:11341140. 5. Byamukama, E., Robertson, A. R., and Nutter, F. W. Jr. 2010. Quantification of temporal and spatial dynamics of Bean pod mottle virus at different spatial scales. Online. Plant Health Progress doi:10.109.1094/PHP-2010-05XX-01-SY. 6. Chilvers, M. I. and Brown-Rytlewski, D. E. 2010. First report and confirmed distribution of soybean sudden death syndrome caused by Fusarium virguliforme in southern Michigan. Plant Disease 94:1164. 7. Cruz, C., Mills, D., Paul, P. A., and Dorrance, A. E. 2010. Impact of brown spot caused by Septoria glycines on soybean in Ohio. Plant Disease 94:820-826. 8. Cui, D., Zhang, Q., Li, M., G.L. Hartman, and Y. Zhao. 2010. Image processing methods for quantitatively detecting soybean rust from multispectral images. Biosystems Engineering 107:186-193. 9. Dorrance, A.E., Cruz, C., Mills, D., Bender, R., Koenig, M., LaBarge, G., Leeds, R., Mangione, D., McCluer, G., Ruhl, S., Siegrist, H., Sundermeier, A., Sonnenberg, D., Yost, J., Watters, H., Wilson, G., and Hammond, R.B. 2010. Effect of foliar fungicide and insecticide applications on soybean in Ohio. Online. Plant Health Progress doi:10.1094/PHP-2010-0122-01-RS. 10. Hill, C.B., L. Crull, T. Herman, D.J. Voegtlin, and G.L. Hartman. 2010. A new soybean aphid (Hemiptera: Aphididae) biotype identified. Journal of Economic Entomology 103:509-515. 11. Hobbs, H.A., T.K. Herman, T.L. Slaminko, Y. Wang, B.T. Nguyen, N.K. McCoppin, L.L. Domier, and G.L. Hartman. 2010. Occurrences of soybean viruses, fungal diseases, and pests in Ilinois soybean rust sentinel plots. Plant Health Progress Online:doi:10.1094/PHP-2010-0827-01-BR. 12. Hughes, T. J., and C. R. Grau. 2010. Influence of soybean monoculture on Phialophora gregata f. sp. sojae IGS-genotype B isolate aggressiveness. Plant Disease 94: 69-74. 13. Kim, K.S., C.B. Hill, G.L. Hartman, D.L. Hyten, M.E. Hudson, and B.W. Diers. 2010. Fine mapping the soybean aphid resistance gene Rag2 in soybean PI 200538. Theoretical and Applied Genetics 121:599-610. 14. Kim, K.S., S. Bellendir, K.A. Hudson, C.B. Hill, G.L. Hartman, D.L. Hyten, M.E. Hudson, and B.W. Diers. 2010. Fine mapping the soybean aphid resistance gene Rag1 in soybean. Theoretical and Applied Genetics 120:1063-1071. 15. Kirk, W.W., R. Schafer and P. Tumbalam. 2010. Evaluation of fungicides for control of foliar diseases in soybean, DeWitt, MI, 2009. PDMR (in press). 16. Li, S., G.L. Hartman, and D.L. Boykin. 2010. Aggressiveness of Phomopsis longicolla and other Phomopsis spp. on soybean. Plant Disease 94:1035-1040. 17. Li, X., Esker, P., Pan, Z., Dias, A. P., and Yang, X. B. 2010. Uniqueness of soybean rust pathosystem: improved understanding of the risk in different regions of the world. Plant Disease 84: 796-806. 18. Lygin, A.V., C.B. Hill, O.V. Zernova, L. Crull, J.M. Widholm, G.L. Hartman, and V.V. Lozovaya. 2010. Response of soybean pathogens to glyceollin. Phytopathology 100:897-903. 19. Lu, X., Byamukama, E., Robertson, A., and Nutter, F. W., Jr. 2010. Prevalence, incidence and spatial dependence of Soybean mosaic virus in Iowa. Phytopathology 100:931-940. 20. Lu, X., Robertson, A. E., and Nutter, F. W., Jr. 2010. Evaluating the importance of stem canker of soybean in Iowa. Plant Dis. 94:167-173. 21. Ma, J., C.B. Hill, and G.L. Hartman. 2010. Production of Macrophomina phaseolina conidia by multiple soybean isolates in culture. Plant Disease 94:1088-1092. 22. Ngugi, N. K., P. D. Esker, and H. Scherm. 2010. Meta-analysis to determine the effect of plant disease management measures: Review and case studies on soybean and apple. Phytopathology 101: 31-41. 23. Paul, C., C.R. Bowen, R. Bandyopadhyay, H. Tefera, R. Adeleke, E. Sikora, M.D. Pegues, and G.L. Hartman. 2010. Registration of three soybean germplasm lines resistant to Phakopsora pachyrhizi (soybean rust). Journal of Plant Registrations 4:244-248. 24. Pedersen, P., G.L. Tylka, A.P. Mallarino, A.E. MacGuidwin, N.C. Koval, and C.R. Grau. 2010. Correlation between soil pH, Heterodera glycines population densities, and soybean yield. Crop Science 50:14581464, doi: 10.2135/cropsci2009.08.0432. 25. Pham, T.A., C.B. Hill, M.R. Miles, B.T. Nguyen, T.T. Vu, T.D. Vuong, T.T. VanToai, H.T. Nguyen, and G.L. Hartman. 2010. Evaluation of soybean for resistance to soybean rust in Vietnam. Field Crop Research 117:131-138. 26. Poromarto, S. H., Nelson, B.D., and Goswami, R. 2010. Effect of soybean cyst nematode on growth of dry bean in the field. Plant Dis. 94:1299-1304. 27. Poromarto, S. H., and Nelson, B. D. 2010. Evaluation of northern-grown crops as hosts of soybean cyst nematode. Online. Plant Health Progress doi:10.1094/PHP-2010-0315-02-RS. 28. Redinbaugh, M.G., Molineros, J.E., Vacha, J., Berry, S.A., Hammond, R.B., Madden, L.V., and Dorrance, A.E. 2010. Bean pod mottle virus spread in insect-feeding-resistant soybean. Plant Dis. 94: 265-270. 29. Rotundo, J.L., G.L. Tylka, and P. Pedersen. 2010. Source of resistance affects soybean yield, yield components, and biomass accumulation in Heterodera glycines-infested fields. Crop Science 50:25652574. 30. Selote D, Kachroo A (2010) Structurally conserved RIN4-like proteins mediate pathogen effector perception in diverse plants. Plant Signaling and Behavior 5:1453-1456 31. Selote D, Kachroo A (2010) RPG1-B derived resistance to AvrB expressing Pseudomonas syringae requires RIN4-like proteins in soybean. Plant Physiology 153:1199-1211 32. Slaminko, T.L., C.R. Bowen, and G.L. Hartman. 2010. Multi-year evaluation of commercial soybean cultivars for resistance to Phytophthora sojae. Plant Disease 94: 368-371. 33. Soria-Guerra, R., S. Rosales-Mendoza, S. Chang, J.S. Haudenshield, D. Zheng, S.R. Suryadevara, G.L. Hartman, S.A. Ghabrial, and S.S. Korban. 2010a. Identifying differentially expressed genes in leaves of Glycine tomentella by suppression subtractive hybridization. Planta 232:1181-1189. 34. Soria-Guerra, R., S. Rosales-Mendoza, S. Chang, J.S. Haudenshield, A. Padmanaban, S. Rodriguez-Zas, G.L. Hartman, S.A. Ghabrial, and S.S. Korban. 2010b. Transcriptome analysis of resistant and susceptible genotypes of Glycine tomentella during Phakopsora pachyrhizi infection reveals novel rust resistance genes. Theoretical and Applied Genetics 120:1315-1333. 35. Soto-Arias, J.P., and Munkvold, G.P. 2010. Impacts of foliar fungicides on infection of soybean by Phomopsis spp. in Iowa. Crop Protection. 30:577-580; DOI: 10.1016/j.cropro.2010.11.018. 36. Tang, E., C.B. Hill, and G.L. Hartman. 2010. Carbon utilization profiles of Fusarium virguliforme isolates. Canadian Journal of Microbiology 56:979-986. 37. Tucker, D.M., Saghai Maroof, M.A., Mideros, S., Skoneczka, J.A., Nabati, D.A., Buss, G.R., Hoeschele, I., Tyler, B.M., St. Martin, S.K., and Dorrance, A.E. 2010. Mapping quantitative trait loci for partial resistance to Phytophthora sojae in a soybean interspecific cross. Crop Sci. 50: 628-635. 38. Twizeyimana, M., and G.L. Hartman. 2010. Culturing Phakopsora pachyrhizi on detached leaves and urediniospore survival at different temperatures and relative humidities. Plant Disease 94:1453-1460. 39. Wang, H., Waller, L., Tripathy, S., St. Martin, S.K., Zhou, L., Krampis, K., Tucker, D.M., Mao, Y., Hoeschele, I., Saghai Maroof, M.A., Tyler, B.M., and Dorrance, A.E. 2010. Analysis of genes underlying soybean quantitative trait loci conferring partial resistance to Phytophthora sojae. The Plant Genome 3: 23-40. Doi: 10.2835/plantgenome2009.12.0029. 40. Zelaya-Molina, L.X., Ellis, M.L., Berry, S.A., and Dorrance, A.E. 2010. First report of Phytophthora sansomeana causing wilting and stunting on corn in Ohio. Plant Dis. 94: 125. 41. Zelaya-Molina L.X., Ortega, M.A., and Dorrance, A.E. 2010. Easy and efficient protocol for oomycete DNA extraction suitable for population genetic analysis. Biotechnol Lett. 2010 Nov 24. PMID 21107649. 42. Zheng, Y., Duan, Y., Chen, S., Sun, J. and Chen, L. 2010. Responses of soybean cyst nematode Heterodera glycines to macroelement and microelement compounds. Bulgarian J. Agric. Sci. 16:172-180. Abstracts, Book Chapters, Edited Scientific Reports, and Proceedings: 1. Aldrich-Wolfe, L., Travers, S. E. and Nelson, B. D. 2010. Genetic variation of Sclerotinia sclerotiorum on four corps from the north central United States. Phytopathology 100: S4. 2. Bestor, N.R., Mueller, D. S., Robertson, A. E. 2010. Management of anthracnose stem blight of soybean with foliar fungicides. North Central APS Abstract. 3. Bienapfl, J.C., Percich, J.A., Malvick, D.K. 2010. Identification and characterization of fungal communities associated with soybean roots in Minnesota. (Abstr.). Phytopathology 100:S14. Presented at the National APS Meeting in Charlotte, NC 2010. 4. Floyd, C.M. and Malvick. D.K. 2010. Widespread latent and pathogenic infection of soybean by the Phomopsis disease complex in Minnesota. Presented at the North Central APS Meeting, Rapid City, SD. 5. Kurle, J. E., Malvick, J.K., Floyd, C.M. and Anderson, G.M. 2010. Five years of monitoring foliar diseases of soybean in Minnesota. (Abstr.). Phytopathology 100:S66. Presented at the National APS Meeting in Charlotte, NC 2010. 6. Luckew, A., Leandro, L, and S. Cianzio. 2010. A Method to Increase Precision In Screening to Identify Differences In Resistance to Sudden Death Syndrome of Soybeans From Resistant by Resistant Crosses. ASA 90-1. American Society of Agronomy Meeting, Oct 2010. 7. Mattupalli, C., and P. D. Esker. 2010. Interactions between Fusarium virguliforme and Phialophora gregata in soybean using greenhouse studies. Phytopathology 100:S79. 8. Mbofung, G., Vincent, M., Fessehaie, A., Bhattacharyya, M. and L. Leandro. 2010. Quantifying Fusarium virguliforme in soil using SYBR green and Taqman assays. Phytopathology 100:S80 9. Poromarto, S. H., and Nelson, B. D. 2010. Lack of adaptation toward greater reproduction of soybean cyst nematode on dry bean. Phytopathology 100:S102 10. Poromarto, S. H., and Nelson, B. D. 2010. Effects of soybean cyst nematode on growth of kidney and navy bean. Phytopathology 100:S102 11. Qi, M., Wang, D., Bradley, C. A., and Zhao, Y. 2010. Genome sequence and comparative genomics of Pseudomonas savastanoi pv. glycinea. Phytopathology 100:S104. 12. Rudolph, K., Bolton, M. D., and Nelson, B. D. 2010. Soybean cyst nematode infects roots of sugar beet. Phytopathology 100:S111 13. Zhang, G., Phillips, D. V., and Bradley, C. A. 2010. Baseline sensitivity of Cercospora sojina to azoxystrobin, trifloxystrobin, and pyraclostrobin. Phytopathology 100:S145. Extension Publications and Articles, Popular Press Articles: 1. Amiri, A., C. R. Grau, N. C. Koval, and P. D. Esker. 2010. Understanding the epidemiology of Cercospora kikuchii on soybean using foliar fungicides. North Central Division Meeting of the American Phytopathological Society, Rapid City, SD. 2. Asian soybean rust, National commentary for 2010 on the IPM-PIPE website. Rotating every second month with Glen Hartman. 3. Chilvers, M. 2010. Soybean northern stem canker. CAT alert. September, 23, 2010. 4. Chilvers, M. 2010 Testing for soybean sudden death syndrome (SDS). CAT alert. September, 23, 2010. From September 23rd - December 1, 2010, there were 118 page views. 5. Chilvers, M. 2010. Soybean sudden death syndrome (SDS)  Fusarium virguliforme. CAT alert. July, 29, 2010. From July 29 - December 1, 2010, there were 441 page views. 6. Chilvers, M. 2010. Sclerotinia stem rot of soybean, identification, factors and management. CAT alert. July, 21, 2010. From July 21 - December 1, 2010, there were 416 page views. 7. Chilvers, M. and Byrne, J. 2010. Soybean and corn seed rot, seedling blight and damping off. CAT alert. May, 27, 2010. 8. Conley, S. P., M. J. Martinka, J. M. Gaska, P. Esker, and N. C. Koval. 2010. 2010 Wisconsin soybean variety test results. Wisconsin Crop Manager 17(30): 143. 9. Esker, P., and A. Peltier. 2010. White mold management in soybean. 2010 Indiana CCA Conference, Indianapolis, IN. 10. Esker. 2010. Plant Management Network  Focus on Soybean: Sclerotinia Stem Rot of Soybean (http://www.plantmanagementnetwork.org/): 11. Esker, P., A. MacGuidwin, and R. Proost. 2010. Nematodes: The overlooked yield robbers in corn and soybean. Publication available through the Nutrient and Pest Management Program. 12. Esker, P., and S. Conley. 2010. Soybean cyst nematode  Look at the whole picture. Wisconsin Soy Sentinel (Winter Issue). 13. Esker, P., and S. Conley. 2010. Sudden death syndrome in soybean  2010. Wisconsin Soy Sentinel (Fall Issue). 14. Esker, P., and S. Conley. 2010. Managing Sclerotinia stem rot in 2010  Core recommendations based on field history. Wisconsin Soy Sentinel (Spring Issue). 15. Esker, P. 2010. Current statewide findings for Sudden death syndrome and Brown stem rot in soybean. Wisconsin Crop Manager 17(24): 102. 16. Esker, P. 2010. Reports of Frogeye leaf spot in soybean. Wisconsin Crop Manger 17(22): 93. 17. Esker, P. 2010. Late season stem diseases  Look closely& Wisconsin Crop Manager 17(22): 92-93. 18. Esker, P. 2010. Reports of white mold  Soybean too late to spray. Wisconsin Crop Manager 17(21): 90. 19. Esker, P. 2010. Scouting for Sudden death syndrome in soybean. Wisconsin Crop Manager 17(21): 89 20. Esker, P., A. Peltier, J. Gaska, and S. Conley. 2010. White mold in soybean in 2010  Factors to consider. Wisconsin Crop Manager 17(16): 68-69. 21. Faghihi, J., Wise, K., Krupke, C., and Ferris, V. 2010. Nematode Updates. Purdue Pest and Crop Newsletter. Issue 23, September 3, 2010. 22. Markell, S., Malvick, D., and Nelson, B. D. 2010. Disease management and identification. Pages 94 -122 In: Soybean Production  field Guide for North Dakota and Northwestern Minnesota, A-1172. NDSU Extension Service, Fargo, ND 172 p. 23. Mueller, D., A. Robertson, A. Sisson, and G. Tylka. 2010. Soybean diseases. Iowa State University Extension Publication CSI 0004, 36 pp. 24. Mueller, D. S. Be on the lookout for white mold. Iowa Soybean Association Agronomic Tip. January 2010. 25. Mueller, D. S. and Robertson, A. E. Summary: Foliar Fungicide on Soybean in Iowa (2006  2009). Integrated Crop Management News site. http://www.extension.iastate.edu/CropNews/2010/0707muellerandrobertson.htm. July 7, 2010. 26. Mueller, D. S. 2010 Soybean Rust Update. Integrated Crop Management News site. http://www.extension.iastate.edu/CropNews/2010/0520mueller.htm. May 20, 2010. 27. Mueller, D. S. 2009 soybean rust summary. Integrated Crop Management News site. http://www.extension.iastate.edu/CropNews/2010/0104mueller.htm. January 4, 2010. 28. Mueller, D. S. Another disease, another call for selecting resistant varieties. Iowa Soybean Association Agronomic Tip. January 2010. 29. Peltier, A. J., A. Amiri, and P. D. Esker. 2010. Understanding factors that influence the efficacy of seed treatments for soilborne pathogens in corn and soybean. Wisconsin Crop Manager 17(8): 29-31. 30. Peltier, A. J., Y. Chen, and P. D. Esker. 2010. Relative aggressiveness of Contans WG and native Coniothyrium minitans isolates from Wisconsin soybean fields. North Central Division Meeting of the American Phytopathological Society, Rapid City, SD. 31. Ritson, R., Bestor, N., Robertson, A., ONeal, M., Mueller, D., Pedersen, P. Impact of fungicide-insecticide tank mixes on soybean in Iowa. Proceedings of the 20th Annual Integrated Crop Management Conference. pg. 27- 32. December 2009. 32. Robertson, A. E. and Mueller, D. S. Be on the Lookout for Soybean Diseases. Integrated Crop Management News site. http://www.extension.iastate.edu/CropNews/2010/0802muellerrobertson.htm. August 2, 2010. 33. Wise, K. 2010.Soybean disease monitoring in 2010. Purdue Pest and Crop Newsletter. Issue 3, April 16th, 2010. 34. Wise, K. 2010. Update on fungicides for soybean rust. Purdue Pest and Crop Newsletter. Issue 10, June 4th, 2010. 35. Wise, K. 2010. Sudden death syndrome in soybean. Purdue Pest and Crop Newsletter. Issue 18, July 30th, 2010. 36. Wise, K. 2010. Soybean disease update. Purdue Pest and Crop Newsletter. Issue 21, August 20, 2010. 37. Wise, K. 2010. Sudden death syndrome and brown stem rot in soybean. Purdue Pest and Crop Newsletter. Issue 23, September 3, 2010.
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