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C. Grau, Kurtzweil, N., and Tylka, G. L., Soil pH influences soybean disease potential, The yield II project: Research-based soybean management information. Iowa Soybean Rev, no. 14, 2003.
J. L. Rotundo, Tylka, G. L., and Pedersen, P., Source of Resistance Affect Soybean Yield, Yield Components, and Biomass Accumulation in-Infested Fields, Crop science, vol. 50, no. 6, pp. 2565-2574, 2010.
F. Workneh, Yang, X. B., and Tylka, G. L., Soybean brown stem rot, Phytophthora sojae, and Heterodera glycines, pp. 844-850, 1999.
F. Workneh, Yang, X. B., and Tylka, G. L., Soybean brown stem rot, Phytophthora sojae, and Heterodera glycines affected by soil texture and tillage relations, Phytopathology, vol. 89, no. 10, pp. 844-850, 1999.
F. Avendano, O'Neal, M. E., and Tylka, G. L., Soybean cyst nematode and soybean aphid interactions on soybean., JOURNAL OF NEMATOLOGY, vol. 39, no. 1. SOC NEMATOLOGISTS PO BOX 311, MARCELINE, MO 64658 USA, pp. 85-85, 2007.
T. L. Niblack and Tylka, G. L., Soybean cyst nematode management guide, North Central Soybean Research Program. University of Missouri Printing Service. Columbia, MO, 1999.
J. Wang, Niblack, T. L., Tremain, J. A., Wiebold, W. J., Tylka, G. L., Marett, C. C., Noel, G. R., Myers, O., and Schmidt, M. E., Soybean cyst nematode reduces soybean yield without causing obvious aboveground symptoms, Plant Disease, vol. 87, no. 6, pp. 623-628, 2003.
G. L. Tylka, Soybean cyst nematode-resistant soybean varieties for Iowa. PM 1649. Iowa State Univ, Ext. Serv., Ames. Soybean cyst nematode-resistant soybean varieties for Iowa. PM, vol. 1649, Submitted.
G. L. Tylka, Soybean cyst nematoderesistant varieties for Iowa, Iowa State University, Ext. Publ. Pm-1649, vol. 1649, pp. 1-26, 2002.
G. M. Tabor, Tylka, G. L., and Bronson, C. R., Soybean stem colonization by genotypes A and B of Cadophora gregata increases with increasing population densities of Heterodera glycines, Plant disease, vol. 90, no. 10, pp. 1297-1301, 2006.
J. A. Browde, Pedigo, L. P., Owen, M. D. K., and Tylka, G. L., Soybean yield and pest management as influenced by nematodes, herbicides, and defoliating insects, Agronomy journal, vol. 86, no. 4, pp. 601-608, 1994.
N. P. Rogovska, Blackmer, A. M., and Tylka, G. L., Soybean yield and soybean cyst nematode densities related to soil pH, soil carbonate concentrations, and alkalinity stress index, Agronomy journal, vol. 101, no. 5, pp. 1019-1026, 2009.
W. L. Gavassoni, Munkvold, G. P., and Tylka, G. L., Spatial dependence of soybean cyst nematode and egg populations, Phytopathology, vol. 86, p. S86, 1996.
F. W. Nutter Jr, Tylka, G. L., Guan, J., Moreira, A. J. D., Marett, C. C., Rosburg, T. R., Basart, J. P., and Chong, C. S., Symposium Papers-Application of GIS and GPS Precision Agriculture Technologies in Nematology and Plant Pathology Presented at the joint American Phytopathological Society, Society of Nematologists, Journal of Nematology, vol. 34, no. 3, pp. 222-231, 2002.
G. A. Kraus, Jones, C. D., and Tylka, G. L., Synthesis of glycinoeclepin A analogs., ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, vol. 220. AMER CHEMICAL SOC 1155 16TH ST, NW, WASHINGTON, DC 20036 USA, pp. U62-U62, 2000.