SAES-422 Multistate Research Activity Accomplishments Report

Status: Approved

Basic Information

Participants

Tika Adhikari (ND); Shaukat Ali (ND); Tom Allen (TX); Bill Beizansky (ND); Gary C. Bergstrom (NY); Bill Bockus (KS); Criag Cook (Westbred, Inc.); John Davies (Westbred, Inc.); Erick DeWolf (PA); Ruth Dill-Macky (MN); Marty Draper (SD); Alan Dyer (MT); Greg Fox (Westbred, Inc.); Tim Friesen (ND); Bill Grey (MT); Andrew Hogg (MT); Charla Hollingsworth (MN); Lee Jackson (CA); Wendy Lewis (MT); Sam Markell (AR); Marcia McMullen (ND); Mohamed Mergoum (ND); Julio Molineroz (PA); Tim Murray (WA); Stephen Neate (ND); Pierce A. Paul (OH); Jack Riesselman (MT); Jeff Stein (SD); Erik Stromberg (VA); Stephen N Wegulo (NE); Yue Jin (USDA-ARS); and Juliet M. Windes (ID)

Accomplishments

Revision of Compendium of Wheat Diseases and Insects. The compilation of chapters and digital images has progressed significantly since the project was initiated in 2005. This work will likely be published in early 2007 by APS Press and represents the first revision in over 20 years. The content has been updated substantially and expanded to address both diseases and insect/mite pests of wheat. This compendium will likely be utilized by a variety of individuals working with wheat, including: researchers (all disciplines), extension specialists and agents, wheat breeders, crop consultants, and growers. Uniform Stagonospora Winter Wheat Nursery. To follow up on the status of this item, Pierce Paul (OH) was not be able to assume the leadership on this project. Erick DeWolf (PA) will attempt to compile the available information for analysis and dissemination to producers. Fusarium Head Blight Risk Assessment Tool. The utilization of this prediction tool by extension personnel, crop consultants, and producers continues to increase. This tool allows individuals to customize their predictions of crop production practices that influence the risk of disease including the presence of crop residues as a local inoculum source and the susceptibility of their crop. We also successfully integrated 24- and 48-hour forecasts into the disease prediction system. Farmers in 23 states have access to the disease prediction models of head scab of wheat. The website used to deploy these model received more than 4,700 visits during the 2005 growing season (April - August). This site was modified in 2006 to include a pilot program that allowed commentary to be entered by the Extension Plant Pathologist from each participating state. The commentaries were intended to provide additional information concerning the FHB risk for that state. Modeling for Fusarium Head Blight in Barley. An effort was initiated in 2005 by researchers in the Northern Great Plains (MN, ND, and SD) to examine the environmental factors impacting the development of Fusarium head blight and deoxynivalenol accumulation in malting barley. This project is being conducted in association with the FHB modeling effort for wheat and will attempt to produce models that can be added to the Fusarium Head Blight Risk Assessment Tool. Coordinated and Region Disease Nurseries. Most members of the NCERA184 are involved to some extent with the evaluation of coordinated disease nurseries. For example, Jeff Stein (SD), Stephen Wegulo (NE), and Bill Bockus (KS) screened a regional HRWW FHB nursery; Gary Bergstom (NY) evaluated a separate regional SRWW FHB nursery; and Ruth Dill-Macky (MN) evaluated HRSW and barley FHB nurseries. In addition, several members evaluated a National stripe rust nursery that allows for changes in the population (races) to be monitored. Coordinated Fungicide and Biological Control Agent Evaluations. Multiple members of the NCERA184 are involved in a trial to evaluate the efficacy of various fungicides and biological control agents in the management of Fusarium head blight of wheat. This trial consists of the same treatments applied to multiple classes of wheat (HRSW, SRWW, etc.) in multiple locations (ND, SD, MO, IN, LO). The impact of these treatments upon deoxynivalenol content in the grain was also evaluated. Coordinated Email Discussions. Multiple members from the NCERA184 regularly submitted information on the disease status of the crops in their state to the USDA-ARS Cereal Disease email list serve. These submissions help keep small grains pathologists up to date on the status of the crops in their region as well as around the country. This system is particularly useful for individuals in the Northern Great Plains as the pathogens present in the Southern states often migrate north. Having an idea of what the potential inoculum pressure will be assists with management recommendations. Emergency Registration of Fungicides. Members of the NCERA184 were integral in the emergency registration (section 18) of the fungicide Folicur for the control of Fusarium Head Blight on wheat and barley. This is a state-by-state activity and is required annually. Individuals in the group regularly share examples of the application with each other in order to facilitate and expedite this process.

Impacts

  1. As a result of this project, participating small grains researchers are a cohesive group that communicate multi-state concerns regarding critical disease issues such as new and emerging diseases, wide-spread and severe epidemics, management recommendations, and regulatory agency decisions. For example, members are concerned about the potential migration of highly virulent races of the wheat rusts and are discussing ways to be pro-active with such issues (e.g. new virulent races of stem rust).
  2. While the committees emphasis is no longer strictly on Fusarium head blight issues, this disease remains a constant threat to the viability of eastern grain producers. Sharing data between key committee members has been instrumental in the development, evaluation, and refinement of an increasingly accurate FHB disease forecasting system. For example, the Fusarium Head Blight Risk Assessment Tool (http://.wheatscab.pseu.edu) that was developed by members of this committee received more than 4,700 visits during the 2005 growing season.
  3. This committee has been instrumental in the development and deployment of increasingly effective management strategies for Fusarium head blight in addition to disease forecast models. For example, several members have determined optimal fungicide recommendations for FHB and recently published them in an extension bulletin that is being co-distributed in at least three states.
  4. Most members of the NCERA184 are involved to some extent with the evaluation of coordinated disease nurseries and identification of new sources of disease resistance. These individuals work closely with breeders and have been instrumental in the discovery and incorporation of resistance into commercial varieties. Examples include HRWW, HRSW, and malting barley nurseries evaluated for susceptibility to FHB and a national stripe rust nursery that allows for changes in the pathogen‘s population (races) to be monitored.

Publications

Research Publications: Anderson, J.A., Busch, R.H., McVey, D.V., Kolmer, J.A., Linkert, G.L., Wiersma, J.V., Dill-Macky, R., Wiersma, J.J. and Harland G.A. 2005. Registration of Oklee wheat. Crop Science, 45:784-785. Ashley, R.O. and McMullen, M. P. 2005. Evaluation of foliar fungicide treatments for control of tan spot in spring wheat at Regent, ND, 2004. Fungic. Nematicide Tests 60:CF018. Bergstrom, G.C. and D.G. Schmale III. 2005. Aerobiology and regional epidemiology of Gibberella zeae. Page 76 in Proc. 4th Canadian Workshop on Fusarium Head Blight. Ottawa Congress Centre. Ottawa, Canada, November 1-3, 2005. Blechl A., Somleva, M., Okubara P., and Dill-Macky, R. 2005. New Approaches to overcome Fusarium Head Blight. In: Proceedings of the IWQCIII, Manhattan, Kansas, USA, May 22-26, 2005, p. 000. Cadle-Davidson, L., G.C. Bergstrom, and T.S. Cox. 2005. Susceptibility of perennial small grains to Soilborne wheat mosaic virus and Wheat spindle streak mosaic virus. Online. Plant Health Progress doi:10.1094/PHP-2005-1130-01-BR. Day KM, Lorton WP, Christmas EP, Mansfield CW, Buechley GC, Shaner GE. 2005. Performance of Public and Private Small Grains in Indiana, 2005. Bulletin No. B 17733 Available at: http://www.agry.purdue.edu/pcpp/smgrains.html. Desjardins A.E., Plattner R.D., Shaner G, Brown DW, Buechley G, Proctor RH, B. Turgeon G. 2006. Field Release of Gibberella zeae genetically modified to lack ascospores. APS Annual meeting, Quebec City, Quebec. Dill-Macky, R., Steffenson, B.J.,. Hollingsworth, C., and Smith, K.P 2005. Management of barley diseases in the upper Midwest. In: Proceedings of the 35th Barley Improvement Conference, Charlestown, South Carolina, USA, January 11-13, 2005, p. 13-15. Dufault, N. S., De Wolf, E. D., Lipps, P. E., Madden, L. V. 2006. Role of temperature and moisture in the production and maturation of Gibberella zeae perithecia. Plant Disease 90:637-644. Fritz, B.K., I.W. Kirk, W.C. Hoffmann, D.E. Martin, V.L. Hofman, C. Hollingsworth, M. McMullen, and S. Halley. Aerial application methods for increasing spray deposition on wheat heads. Applied Engineering Agri. 22(3): 357-364. Garvin, D.F. and Dill-Macky, R. 2005. Evaluation of wheat lines near-isogenic for diverse Fusarium Head Blight resistance QTLs. In: Proceedings of the 2005 National Fusarium Head Blight Forum, Milwaukee, Wisconsin, USA, December 11-13, 2005, p. 29-30. Hollingsworth, C.R. 2005. Deoxynivalenol levels in wheat and barley following application of fungicide for Fusarium head blight control. Pages 41-42 in: Proc. Assoc. Analytical Chemists International Midwest Sect. 23-26 May 2005. Kansas City MO. Hollingsworth, C.R. and C.D. Motteberg. 2005. Efficacy of fungicides in controlling Fusarium head blight on spring wheat in Minnesota, 2004. Fungic. Nematicide Tests 60:CF002. Hollingsworth, C.R. and C.D. Motteberg. 2005. Efficacy of fungicides in controlling Fusarium head blight on spring barley in Minnesota, 2004. Fungic. Nematicide Tests 60:CF003. Hollingsworth, C.R., C.D. Motteberg, and W.G. Thompson. 2005. 2005 FHB uniform fungicide trial on hard red winter wheat in Minnesota. Pages 203 in: Proc. 2005 Natl. Fusarium Head Blight Forum. 11-13 Dec. 2005. Milwaukee, WI. Hollingsworth, C.R., C.D. Motteberg, and W.G. Thompson. 2005. 2005 FHB uniform fungicide trial on spring barley in Minnesota. Pages 204 in: Proc. 2005 Natl. Fusarium Head Blight Forum. 11-13 Dec. 2005. Milwaukee, WI. Hollingsworth, C. and C. Motteberg. 2005. Increased deoxynivalenol levels in grain of hard red spring wheat following application of pyraclostrobin at Feekes 9.5. Phytopathology 95:S43-S44. Hollingsworth, C., M. McMullen, S. Halley, V. Hofman, C. Motteberg, and S. Meyer. 2005. Cooperative study for improved management of Fusarium head blight using aerial application of fungicide. Pages 205-208 in: Proc. 2005 Natl. Fusarium Head Blight Forum. 11-13 Dec. 2005. Milwaukee, WI. Hollingsworth, C.R., C.D. Motteberg, and W.G. Thompson. 2005. 2005 FHB uniform fungicide trial on hard red spring wheat in Minnesota. Pages 200-202 in: Proc. 2005 Natl. Fusarium Head Blight Forum. 11-13 Dec. 2005. Milwaukee, WI. Hollingsworth, C.R. and L.M. Atkinson. 2006. Responses of five commercial spring wheat cultivars to early infection with phytoplasmas known to cause aster yellows. No. P-6 in: Proc. APS North Central Conf. 13-15 June 2006. Fargo, ND. Hollingsworth, C., C. Motteberg, J. Machado, I. MacRae, and J. Wiersma. 2005. Evaluating tissue locations of small grain plants for detection of phytoplasma and determining aster yellows distribution in northwestern Minnesota. Phytopathology 95:S43. Hollingsworth, C.R. and C.D. Motteberg. 2006. Quality, yield, and economic outcomes of six hard red spring wheat cultivars in the Red River Valley of Minnesota. No. P-8 in: Proc. APS North Central Conf. 13-15 June 2006. Fargo, ND. Hollingsworth, C.R., C.D. Motteberg, and W.G. Thompson. 2006. Efficacy of fungicides in controlling Fusarium head blight on spring wheat in Minnesota, 2005. Fungic. Nematicide Tests 61:CF010. Hollingsworth, C.R., C.D. Motteberg, and W.G. Thompson. 2006. Efficacy of fungicides in controlling Fusarium head blight on spring barley in Minnesota, 2005. Fungic. Nematicide Tests 61:CF009. Hollingsworth, C.R., C.D. Motteberg, and W.G. Thompson. 2006. Efficacy of fungicides in controlling Fusarium head blight on winter wheat in Minnesota, 2006. Fungic. Nematicide Tests 61:CF011. Hollingsworth, C.R., D.A. Samac, and L.M. Atkinson. 2006. Phoma sclerotioides confirmed as a pathogen of winter wheat and its distribution in northwest Minnesota. No. P-7 in: Proc. APS North Central Conf. 13-15 June 2006. Fargo, ND. Horsley, R.D., Pederson, J.D., Schwarz, P.B., McKay, K., Hochhalter, M.R., and McMullen, M. P. 2006. Integrated use of tebuconazole and Fusarium head blight resistant barley genotypes in controlling Fusarium head blight and deoxynivalenol accumulation. Agron. J. 98:194-197. Lehman J.S., Hanson K.A., Shaner G. 2005. Relationship among genes conferring partial resistance to leaf rust (Puccinia triticina) in wheat lines CI 13227 and L-574-1. Phytopathology. 95:198-205. Lewis, J.M., Mackintosh, C.A., Shin, S.H., Smith, L.A., Wyckoff, M.N., Elakkad, A.M., Wennberg K.J., Heinen, S.J., Radmer, L.E., Baldridge, G.D., Zeyen, R.J., Evans, C.K., Kravchenko, S., Dill-Macky, R. and Muehlbauer, G.J. 2005. Overexpression of antifungal proteins increases resistance of wheat to Fusarium Head Blight in the field. In: Proceedings of the 2005 National Fusarium Head Blight Forum, Milwaukee, Wisconsin, USA, December 11-13, 2005, p. 103. Maldonado-Ramirez, S.L, D.G. Schmale III, E.J. Shields, and G.C. Bergstrom. 2005. The relative abundance of viable spores of Gibberella zeae in the planetary boundary layer suggests the role of long-distance transport in regional epidemics of Fusarium head blight. Agricultural and Forest Meteorology 132: 20-27. Mansfield, M. A., De Wolf, E. D., and Kuldau, G. A. 2005. Relationships between weather conditions, agronomic practices, and fermentation characteristics with Deoxynivalenol content in fresh and ensiled maize. Plant Disease 89:1151-1157. McMullen, M. 2005. An update on the impact of Fusarium head blight on North American agriculture. Phytopathology 95:S123. McMullen, M., Jordahl, J., and Meyer, S. 2005. Effect of adjuvants on efficacy of Folicur fungicide for FHB control. Page 215 in: Proceedings of the 2005 National Fusarium head blight Forum. Dec. 11-13, Milwaukee, WI. U.S. Wheat and Barley Scab Initiative, Michigan State Univ., East Lansing, MI. McMullen, M., and Lukach, J. 2005. Results of the uniform fungicide trial on barley, North Dakota, 2005. Page 217 in: Proceedings of the 2005 National Fusarium head blight Forum. Dec. 11-13, Milwaukee, WI. U.S. Wheat and Barley Scab Initiative, Michigan State Univ., East Lansing, MI. McMullen, M., Lukach, J., McKay, K., and Schatz, B. 2005. Wheat uniform fungicide trials, ND, 2005. Pages 218-220 in: Proceedings of the 2005 National Fusarium head blight Forum. Dec. 11-13, Milwaukee, WI. U.S. Wheat and Barley Scab Initiative, Michigan State Univ., East Lansing, MI. McMullen, M., Jordahl, J., Meyer, S. 2005. Evaluation of fungicides for control of Fusarium head blight and net blotch in barley, 2004. Fungic. Nematicide Tests 60:CF009. McMullen, M., Jordahl, J., and Meyer, S. 2005. Evaluation of fungicides for control of Fusarium head blight and leaf diseases in wheat, 2004. Fungic. Nematicide Tests 60:CF010. Molineros, J., DeWolf, E., Madden, L., Paul, P., and Lipps, P. 2005. Incorporation of Host Reaction and Crop Residue Level into Prediction Models for Fusarium Head Blight. Pages 119-122 in: Proc. 2005 Natl. Fusarium Head Blight Forum, Milwaukee, WI. Mudge, A.M., Dill-Macky, R., Dong, Y., Wilson, I., and Manners, J.M. 2005. Mycotoxin production and fungal gene expression during infection and crowns and heads of wheat by Fusarium graminearum. (Abstr.# 312) In: Proceedings of the 23rd Fungal Genetics Conference, Pacific Grove, California, USA, March 15-20, 2005, p. 131. Nita, M., De Wolf, E., Madden, L., Paul, P., Shaner, G., Adhikari, T., Ali, S., Stein, J., Osborne, L. 2006. Effect of corn residue level on disease intensity of Fusarium head blight (FHB) and on deoxyvalenol (DON) concentration: A multi-state field study. Phytopathology 96:S85 Nita, M., DeWolf, E., Madden, L., Paul, P., Shaner, G., Adhikari, T., Ali, S., Stein, J. and Osborne, L. 2005 Effect of Corn Residue Level on the Incidence of Fusarium Head Blight. Page 124 in: Proc. 2005 Natl. Fusarium Head Blight Forum, Milwaukee, WI. Paul, P.A., P. E. Lipps, and L. V. Madden. 2005. Relationship between visual estimates of Fusarium head blight intensity and deoxynivalenol accumulation in harvested wheat grain: A Meta-Analysis. Phytopathology 95:1225-1236. Paul, P. A., El-Allaf, S. M., Lipps, P. E., and Madden, L. V. 2005. Relationship between incidence and severity of Fusarium head blight on winter wheat in Ohio. Phytopathology 95:1049-1060. Paul, P. A., Madden, L. V., and Lipps, P. E. 2005. Relationship between FHB Index and DON: A Quantitative Synthesis of Eight Years of Research. Pages 138-139 in: Proc. 2005 Natl. Fusarium Head Blight Forum, Milwaukee, WI. Paul, P. A., Hershman, D., Draper, M., and Madden, L. V. 2005. Effect of Fungicides on FHB and DON in Wheat - 2005 Uniform Fungicide Trials. Pages 225-229 in: Proc. 2005 Natl. Fusarium Head Blight Forum, Milwaukee, WI. Paul, P. A., Lipps, P. E., and Madden, L. V. 2005. Inoculum and Fusarium head blight gradient generated by wind and rain splash from a small area-source within wheat canopies. Phytopathology 95:S81. Paul, P. A., Madden, L. V. and Lipps, P. E. 2006. Seasonal variation in the association between within-field inoculum and Fusarium head blight development in winter wheat. Phytopathology 96:S91. Paul, P. A., Madden, L. V., Lipps, P. E., De Wolf, E., Shaner, G., Buechley, G., Adhikari, T., Ali, S., Stein, J., and Osborne, L. 2006 Modeling the abundance of propagules of Gibberella zeae within wheat canopies. Phytopathology 96:S91. Perez, C.A., Dill-Macky, R. and Kinkel, L.L. 2005. Evaluating the potential for green manures to enhance indigenous soil antagonists and reduce inoculum of Fusarium graminearum in wheat residues. Phytopathology, S82. Pereyra, S.A. and Dill-Macky, R. 2005. Colonization and inoculum production of Gibberella zeae in components of wheat residue. Cereal Research Communications, 33:755-762. Pereyra, S., Garmendia, G., Cabrera, M., Vero, S., Pianzzola, M, and Dill-Macky, R. 2005. Control Biológico de la Fusariosis de la Espiga de Trigo y Cebada (Biological Control of Fusarium Head Blight of Wheat and Barley). Agrociencia, 9:337-343. Salas, B. and Dill-Macky, R. 2005. Colonization of wheat cultivars by Fusarium graminearum at harvest and in overwintered residues. In: Proceedings of the 2005 National Fusarium Head Blight Forum, Milwaukee, Wisconsin, USA, December 11-13, 2005, p. 140-143. Salas, B. and Dill-Macky, R. 2005. Effect of residue management and host resistance on the epidemiology of Fusarium Head Blight. In: Proceedings of the 2005 National Fusarium Head Blight Forum, Milwaukee, Wisconsin, USA, December 11-13, 2005, p. 144-147. Salas, B. and Dill-Macky, R. 2005. Effect of residue management and host resistance on the epidemiology of Fusarium Head Blight. Phytopathology, S92. Shaner G, Buechley G. 2005. Control of Fusarium head blight of wheat in Indiana with foliar fungicides, 2004. F&N Tests, Report No. 60:CF001. Schmale, D.G. III, Q.A. Arntsen, and G.C. Bergstrom. 2005. The forcible discharge distance of ascospores of Gibberella zeae. Can. J. Plant Pathol. 27: 376-382. Schmale, D.G. III, D. A. Shah, and G.C. Bergstrom. 2005. Spatial patterns of viable spore deposition of Gibberella zeae in rotational wheat fields. Phytopathology 95: 472-479. Schmale, D.G. III, D. A. Shah, and G.C. Bergstrom. 2005. Spatial patterns of viable spore deposition of the ear rot pathogen, Gibberella zeae, in first-year corn fields. Can. J. Plant Pathol. 27: 225-233. Schmale, D.G.III, E.J. Shields, and G.C. Bergstrom. 2006. Night-time spore deposition of the fusarium head blight pathogen, Gibberella zeae, in rotational wheat fields. Can. J. Plant Pathol. 28:1-9. Schmale, D.G. III and G.C. Bergstrom. 2005. The aerobiology and population genetic structure of Gibberella zeae. Phytopathology 95:S127. Schmale, D.G. III, J.F. Leslie, R.L. Bowden, K.A. Zeller, A.A. Saleh, E.J. Shields, and G.C. Bergstrom. 2005. Genetic structure of atmospheric populations of Gibberella zeae. Page 149 in Proc. 2005 National Fusarium Head Blight Forum, Hilton Milwaukee City Center, Milwaukee, WI, December 11-13, 2005. Schmale, D.G. III, J.F. Leslie, A.A. Saleh, E.J. Shields, and G.C. Bergstrom. 2005. Temporal scales of genetic diversity within New York atmospheric populations of Gibberella zeae. Page 149 in Proc. 2005 National Fusarium Head Blight Forum, Hilton Milwaukee City Center, Milwaukee, WI, December 11-13, 2005. Sneller, C. H., Lipps, P., Paul, P., Herald, L., Sugerman, B., and Johnston, A. Report on the 2004-05 Preliminary (PNUWWSN) and Advanced (NUWWSN) Northern Uniform Winter Wheat Scab Nursery. Pages 86-90 in: Proc. 2005 Natl. Fusarium Head Blight Forum, Milwaukee, WI. Steddom, K., McMullen, M., Schatz, B., and Rush, C. M. 2005. Comparing image format and resolution for assessment of foliar diseases of wheat. Plant Health Progress doi:10.1094/PHP-2005-0516-01-RS. Xu XY. ,Bai G.H. Carver B.F. Shaner G.E. Hunger R.M. 2005. Mapping of QTLs prolonging the latent period of Puccinia triticina infection in wheat. Theoretical & Applied Genetics. 110(2):244-251. Xu X.Y., Bai G.H. Carver B.F. Shaner G.E. Hunger RM. 2005. Molecular characterization of slow leaf-rusting resistance in wheat. Crop Sci. 45(2):758-765. Yang J, Bai G, Shaner G.E. 2005. Novel quantitative trait loci (QTL) for Fusarium head blight resistance in wheat cultivar Chokwang. TAG. 111:1571-1579. Extension Publications: Aakre,D., Flaskerud, G., Hellevang, K., Lardy, G., McMullen, M., Ransom, J., Sorenson, B., and Swenson, A. 2005. DON (Vomitoxin) in wheat. NDSU Extension Circular PP-1302. Hollingsworth, C. 2005. Foliar-applied fungicides for application on small grain crops in Minnesota. Cropping Issues in NW Minnesota 2:2. Hollingsworth, C. 2005. Section 18 issues for Folicur to control Fusarium head blight. Cropping Issues in NW Minnesota 3:1. Hollingsworth, C. 2005. Tan spot of wheat is creating havoc in the Red River Valley. Cropping Issues in NW Minnesota 3:3. Severson, R., C. Motteberg, and C. Hollingsworth. 2005. Early season fungicide-herbicide combinations 2004. Cropping Issues in NW Minnesota 3:4. Hollingsworth, C. 2005. Fusarium head blight of wheat. Cropping Issues in NW Minnesota 6:4. Hollingsworth, C. 2005. Bacterial stripe of wheat is causing widespread concern. Cropping Issues in NW Minnesota 9:2. Hollingsworth, C. 2005. Red River Valley disease brief. Cropping Issues in NW Minnesota 10:2-3. Hollingsworth, C. 2005. Red River Valley crop disease summary for 2005. Cropping Issues in NW Minnesota 12:2-3. Hollingsworth, C. 2005. Mid to late season wheat disease management issues. MN Crop eNews 05MNCN27. Hollingsworth, C. 2005. Red River Valley on-farm wheat disease management trials Kittson, Roseau, Red Lake, Norman, and Wilkin Counties. Pages 15-20 in: On-Farm Cropping Trials, NW and WC Minnesota. Jan. 2005. Hollingsworth, C. and C. Motteberg. 2005. 2004 Uniform fungicide trial on the control of Fusarium head blight on hard red spring wheat and barley. Minnesota. MN Crop eNews 05MNCN12. Hollingsworth, C. 2006. Its tans spot time! Determine whether a disease management strategy is needed for your spring wheat crop. Cropping Issues in NW Minn. 3: 2-3. Hollingsworth, C. 2006. Spring wheat disease update and more. Cropping Issues in NW Minnesota. 3:2. Hollingsworth, C. 2006. Disease Outlook for winter and spring wheats. Small Grains Update. 201:6. Hollingsworth, C. 2006. Spring wheat disease update and more... Small Grains Update. 202. 4. Hollingsworth, C. 2006. Aster yellows and barley yellow dwarf diseases in small grains. Page 24 in: On-Farm Cropping Trials, NW and WC Minnesota. Jan. 2006. Hollingsworth, C. 2006. Determining spring wheat crop injury resulting from early season application of fungicides and herbicides: Year 2. Page 16 in: On-Farm Cropping Trials, NW and WC Minnesota. Jan. 2006. Hollingsworth, C., I. MacRae, and D. Holen. 2006. Wheat streak mosaic confirmed in the Red River Valley. Minnesota Crop eNews 06MNCN38. Hollingsworth, C. McMullen, M. and S. Halley. 2006. Development of improved Fusarium head blight management strategies in the Red River Valley using aerial application of fungicide. Page 18 in: On-Farm Cropping Trials, NW and WC Minnesota. Jan. 2006. Hollingsworth, C. and C. Motteberg. 2006. Red River Valley on-farm disease management trials of spring wheat. Pages 19- 23 in: On-Farm Cropping Trials, NW and WC Minnesota. Jan. 2006. Hofman, V., S. Halley, G. Van Ee, B. Draper, M. McMullen, and C. Hollingsworth. 2006. Ground application of fungicide for the suppression of Fusarium head blight in small grains. NDSU Ext. Serv. AE-1314. Kandel, H., C. Hollingsworth, C. Holen, and D. Holen. 2005. Iron chlorosis in soybean. Cropping Issues in NW Minnesota 5:2-3. Lentz, E., P. Paul, and J. Beuerlein. 2006. Wheat assessment and considerations. Crop Observation and Recommendation Network Newsletter 2006-6. http://corn.osu.edu/ McMullen, M., and Bradley, C. 2006. 2006 North Dakota field crop fungicide guide. NDSU Extension Circular PP-622. 61 p McMullen, M., Ashley, R., Endres, G., Gregoire, T., and Knodel, J. 2006. North Dakota wheat disease survey, 2005. Pages 507-509 in: 2006 ND Crop Production Guide, No. 16. McMullen, M., Lukach, J., McKay, K., Schatz, B. 2005. Uniform fungicide trials, wheat, ND, 2005. Pages 505-506 in: 2006 ND Crop Production Guide, No. 16. Neate, S. and McMullen, M. 2005. Barley disease handbook. NDSU Extension Publication PP-1293. 51p. Paul, P. 2006 - Wheat growth stage, disease progress, disease thresholds and fungicide application. Crop Observation and Recommendation Network Newsletter 2006-3. http://corn.osu.edu/ Paul, P. and D. Mills. 2006. Sampling Wheat for Deoxynivalenol (DON). Crop Observation and Recommendation Network Newsletter 2006-19. http://corn.osu.edu/ Paul, P. and D. Mills. 2006. As Predicted, Moderate to Low Levels of Wheat Head Scab in Ohio. Crop Observation and Recommendation Network Newsletter 2006-18. http://corn.osu.edu/ Paul, P. and D. Mills. 2006. Late Increase of Stagonospora Blotch and Wheat Leaf Rust. Crop Observation and Recommendation Network Newsletter 2006-18. http://corn.osu.edu/ Paul, P. and D. Mills. 2006. The Risk of Wheat Scab Remains Low in Ohio. Crop Observation and Recommendation Network Newsletter 2006-14. http://corn.osu.edu/ Paul, P. and D. Mills. 2006. Leaf Rust on Wheat. Crop Observation and Recommendation Network Newsletter 2006-15. http://corn.osu.edu/ Paul, P. and D. Mills. 2006. Powdery Mildew is Still on the Move in Spite of the Cold Temperatures. Crop Observation and Recommendation Network Newsletter 2006-14. http://corn.osu.edu/ Paul, P. and D. Mills. 2006. Wheat scab update - Crop Observation and Recommendation Network Newsletter 2006-13. http://corn.osu.edu/ Paul, P. and D. Mills. 2006. Fungicides for Powdery Mildew Control on Susceptible Wheat Varieties. Crop Observation and Recommendation Network Newsletter 2006-12. http://corn.osu.edu/ Paul, P., D. Mills, and J. Beuerlein. 2006. Scouting & Managing Leaf Diseases of Wheat With Fungicides. Crop Observation and Recommendation Network Newsletter 2006-12. http://corn.osu.edu/ Paul, P. and D. Mills. 2006. Wheat scab risk prediction tool and wheat update. Crop Observation and Recommendation Network Newsletter 2006-10. http://corn.osu.edu/ Severson, R. and C. Hollingsworth. 2005. Determining wheat crop injury levels by tank-mixing fungicide and herbicides early in the growing season. Pages 13-14 in: On-Farm Cropping Trials, NW and WC Minnesota. Jan. 2005. Severson, R., G. Rehm, C. Hollingsworth and D. Holen. 2005. Inputs for wheat production: Whats economic, whats not? Page 23 in: On-Farm Cropping Trials, NW and WC Minnesota. Jan. 2005.
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