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G. L. Tylka, Fall Time to Sample for SCN—But Not for Nematodes That Feed on Corn, 2011.
G. Tylka, Check SCN Resistant Soybean Roots for SCN Females, Integrated crop management news, 2009.
G. L. Tylka, Hussey, R. S., and Roncadori, R. W., INTERACTION OF SOYBEAN AND HETERODERA GLYCINES AS AFFECTED BY VESICULAR-ARBUSCULAR MYCORRHIZAL FUNGI AND PHOSPHORUS FERTILITY, JOURNAL OF NEMATOLOGY, vol. 20, no. 4. SOC NEMATOLOGISTS 3012 SKYVIEW DRIVE, LAKELAND, FL 33801-7072, pp. 662-662, 1988.
G. Tylka, SCN females on roots signal infestations and possibly ineffectiveness of resistance, Integrated crop management, 2007.
G. L. Tylka and Wisner, R. N., Soybean rust and the food processing industry, Food technology, vol. 59, no. 6, 2005.
G. Tylka, Fall Is Great Time to Sample For SCN, But Not Corn Nematodes, Integrated crop management news, 2009.
G. L. Tylka, Gebhart, G. D., and Marett, C. C., Performance of SCN-resistant soybean varieties in fields infested with different soybean cyst nematode HG types, PHYTOPATHOLOGY, vol. 100, no. 6. AMER PHYTOPATHOLOGICAL SOC 3340 PILOT KNOB ROAD, ST PAUL, MN 55121 USA, pp. S190-S190, 2010.
G. L. Tylka, Fall Soil Sampling for SCN Can Pay Big Dividends in 2013, 2012.
G. Tylka, Spring Sampling Not Recommended for Most Corn Nematodes, Integrated crop management, 2007.
G. L. Tylka, Variety Trial Results Show Differences in SCN Control Among Varieties, 2012.
G. Tylka, Soybean cyst nematode, Iowa State University. Cooperative Extension Service (USA), 1994.
G. Tylka, Corn Nematodes and Soybean Cyst Nematode: Similar But Very Different, Integrated crop management news, 2010.
G. L. Tylka, Gebhart, G. D., and Marett, C. C., Evaluation of Soybean Varieties Resistant to Soybean Cyst Nematode in Southeast Iowa in 2005, 2005.
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. Online, Plant Health Progres, 2011.
G. Tylka and Robertson, A., Surveying Iowa for SCN, Integrated crop management, 2007.
G. L. Tylka, Distribution of the Soybean Cyst Nematode in Iowa: 1995-1996 versus 2007, Submitted.
G. Tylka and Marett, C., Effects of N-Hibit Seed Treatment on Soybean Yields–2008 Iowa Research, Integrated crop management news, 2008.
G. L. Tylka, Now is the Time to Look for SCN Females on Soybean Roots, 2012.
G. L. Tylka, Know Your Choices: Hundreds of SCN-resistant Soybean Varieties For Iowa, 2011.
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, 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. 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. 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, Soybean Cyst Nematode Reproduction High in 2012, 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. L. Tylka, There’s Still Time to Check Fields for SCN Before 2012 Crop, 2012.
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, 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, 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. 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. 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, New Information and Videos on Website, 2012.
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. 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, 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. 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. Tylka, Nematodes in corn production: A growing problem, Integrated crop management, 2007.
G. L. Tylka, of Soybean Cyst Nematode Field Guide Available, 2012.

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