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G. L. Tylka, Now is the Time to Look for SCN Females on Soybean Roots, 2012.
G. Tylka and Marett, C., Effects of N-Hibit Seed Treatment on Soybean Yields–2008 Iowa Research, Integrated crop management news, 2008.
G. Tylka, SCN Confirmed for First Time in Lyon County, Integrated crop management news, 2008.
G. L. Tylka, Gebhart, G. D., and Marett, C. C., Northern Iowa Evaluation of Soybean Varieties Resistant to Soybean Cyst Nematode—2003, 2003.
G. L. Tylka, Know Your Choices: Hundreds of SCN-resistant Soybean Varieties For Iowa, 2011.
G. Tylka and Marett, C., Field testing of N-Hibit seed treatment in 2007 for management of SCN in Iowa, Integrated crop management, 2007.
G. L. Tylka, Management of nematode diseases [recurso electrónico]: options., Submitted.
G. L. Tylka, Soybean cyst nematoderesistant varieties for Iowa, Iowa State University, Ext. Publ. Pm-1649, vol. 1649, pp. 1-26, 2002.
G. Lee Tylka and Mullaney, M. P., Soybean cyst nematode-resistant soybean varieties for Iowa. Iowa State University, University Extension, 2002.
G. L. Tylka, Soybean Cyst Nematode Reproduction High in 2012, 2012.
G. Tylka, Common corn nematode characteristics, Integrated crop management news, 2009.
G. L. Tylka, Get the Latest Information on Performance of SCN-resistant Soybeans, 2013.
G. L. Tylka, There’s Still Time to Check Fields for SCN Before 2012 Crop, 2012.
G. Tylka, Be Careful with Susceptible Soybean Variety in Rotation to Manage SCN, Integrated crop management news, 2008.
G. L. Tylka, Soybean cyst nematode management field guide, 2008.
G. Tylka, Quick facts About Corn Nematodes, Integrated crop management news, 2009.
G. L. Tylka and Marett, C. C., Comparing Yields of Soybean Varieties with Different Sources of SCN Resistance in Strip Trials, 2009.
G. L. Tylka, The isolation, quantification, and possible integrated control of Cylindrocladium spp. from Mont Alto and Penn forest tree nursery soils, California University of Pennsylvania, 1985.
G. L. Tylka, Hussey, R. S., and Roncadori, R. W., Interactions of vesicular-arbuscular mycorrhizal fungi, phosphorus, and Heterodera glycines on soybean, Journal of nematology, vol. 23, no. 1, p. 122, 1991.
G. Tylka, Soybean cyst nematode confirmed in Ida County in 2008, Integrated crop management news, 2008.
G. L. Tylka, Be Wary of High SCN Numbers in 2014, 2014.
G. L. Tylka, Current status of the soybean cyst nematode as a threat to soybean production in the Midwest, Proc. 18th Annual Integrated Crop Management Conf., Ames, IA, pp. 28-29, 2007.
G. L. Tylka, New Information and Videos on Website, 2012.
G. Tylka, Soil Sample Results Can Reveal if SCN Management is Working, Integrated crop management news, 2008.
G. L. Tylka, Sisson, A. J., Jesse, L. C., Kennicker, J., and Marett, C. C., Testing for Plant-parasitic Nematodes that Feed on Corn in Iowa 2000-2010, Submitted.
G. L. Tylka, Nematode-protectant seed treatments: New options for nematode management in row crops, PHYTOPATHOLOGY, vol. 103, no. 6. AMER PHYTOPATHOLOGICAL SOC 3340 PILOT KNOB ROAD, ST PAUL, MN 55121 USA, pp. 174-174, 2013.
G. L. Tylka, Spring Sampling Not Recommended for Nematodes on Corn—Except for Sandy Fields, 2012.
G. Tylka, Sample fields this fall for SCN to figure out 2007 or plan for 2008, Integrated crop management, 2007.
G. Tylka, Check Fields for Soybean Cyst Nematode, Integrated crop management news, 2008.
G. L. Tylka, McCarville, M. T., Marett, C. C., Gebhart, G. D., Soh, D. H., Mullaney, M. P., and O'Neal, M. E., DIRECT COMPARISON OF SOYBEAN CYST NEMATODE REPRODUCTION ON RESISTANT SOYBEAN VARIETIES IN GREENHOUSE AND FIELD EXPERIMENTS, JOURNAL OF NEMATOLOGY, vol. 45, no. 4. SOC NEMATOLOGISTS PO BOX 311, MARCELINE, MO 64658 USA, pp. 322-323, 2013.
G. L. Tylka, Yield losses of Heterodera glycines-resistant soybean cultivars in Iowa in 1996, J. Nematol, vol. 29, p. 610, 1997.
G. L. Tylka, Sanogo, C., and Souhrada, S. K., Relationships among Heterodera glycines population densities, soybean yields, and soil pH, J. Nematol, vol. 30, pp. 519-520, 1998.
G. L. Tylka, of Soybean Cyst Nematode Field Guide Available, 2012.
G. Tylka, Nematodes in corn production: A growing problem, Integrated crop management, 2007.
G. L. Tylka, A 10-Year Summary of Testing for Nematodes that Feed on Corn in Iowa, 2011.
G. Tylka, Sample now for most corn nematodes, Integrated Crop Management, 2007.
G. L. Tylka and Flynn, P., Interpreting SCN soil sample results/; prepared by Gregory L. Tylka and Paula Flynn., IPM 61, 1999.
G. Tylka, Winter annual weeds and SCN: What's the connection, Integrated crop management, 2007.
G. L. Tylka, Gebhart, G. D., Marett, C. C., and Mullaney, M. P., Evaluation of Soybean Varieties Resistant to Soybean Cyst Nematode, 2011.
G. L. Tylka, Gebhart, G. D., and Marett, C. C., Evaluation of soybean varieties resistant to soybean cyst nematode in Iowa, Iowa State University IPM Bulletin, vol. 52, 2002.
G. L. Tylka, Hussey, R. S., and Roncadori, R. W., Axenic germination of vesicular-arbuscular mycorrhizal fungi: effects of selected Streptomyces species, Phytopathology, vol. 81, no. 7, pp. 754-759, 1991.
G. Tylka, Soybean Cyst Nematode Females now Apparent on Soybean Roots, Integrated crop management news, 2008.
G. L. Tylka, Trial Results Show Dual Benefits of SCN Resistance, 2014.
G. Tylka, Soh, D., and Coats, J., Glucosinolate breakdown products for management of Heterodera glycines, J. Nematol, vol. 609, 1997.
G. L. Tylka, Possible Breakdown of SCN Resistance Topic of New Webcast, 2012.
G. Tylka, Soybean cyst nematode: Still a major threat to soybean production, Integrated crop management, 2007.
G. L. Tylka, Management of Nematode Diseases: Options, in Encyclopedia of Plant and Crop Science, Taylor & Francis, 2004, pp. 684-688.
G. L. Tylka, 2012 Season is Not a Good One to “Roll the Dice” with SCN, 2012.
G. Tylka, Results of SCN-resistant soybean variety testing become available, Integrated crop management, 2007.
G. Tylka, new take on soil sampling fields for SCN, Integrated crop management, 2007.

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