Vita - Robert G. Hartzler
Professional experience:
11/89 - current Asst.- Prof./Exten. Weed management specialist, Iowa State Univ.
7/87 - 10/89 Asst. Prof./Exten. Weed management specialist, Penn State Univ.
7/82 - 6/87 Extension associate - Weed management, Iowa State Univ.
1/80 - 6/82 Graduate Assistant, Virginia Tech
6/78 - 12/79 Horticulturist/Asst. manager, ChemLawn, Norcross, GA
Current appointment: 80% extension / 20% research
Recent publications/Abstracts:
Hartzler, R.G., K. Harrison, C. Sprague and L. Wax. 2002. Emergence characteristics of giant ragweed populations from Ohio, Illinois and Iowa. Proc.North Central Weed Sci. Soc. 57:51.
Nordby, D. E. and R.G Hartzler. 2002. Influence of corn on waterhemp growth and fecundity. Proc.North Central Weed Sci. Soc. 57:145.
Paz, J. O., W. D. Batchelor, G. L. Tylka and R. G. Hartzler. 2001. A modeling approach to quantify the spatial soybean yield limiting factors. Trans. Amer. Soc. Agric. Eng. 44:1329-1334.
Hartzler, R. G and B. Battles. 2001. Reduced fitness of velvetleaf (Abutilon theophrasti) surviving glyphosate. Weed Technol. 15:492-496.
Buhler, D. D. and R. G Hartzler. 2001. Emergence and persistence of Abutilon theophrasti, Amaranthus rudis, Eriochloa villosa and Setaria faberi. Weed Sci. 49:230-236.
Hartzler, R. G and B. A. Pringnitz. 2001. Use of the world wide web in weed science extension programming. Weed Sci. Soc. Amer. Abstr. 41:278.
Hartzler, R G. 1999. Emergence characteristics of five woolly cupgrass populations. Proc. North Central Weed Sci. Soc. 54: 47.
Battles, B. and R. Hartzler. 1999. Evaluations of variable rate herbicide applications. Proc. North Central Weed Sci. Soc.54:72.
Hanna, H. M., R. G Hartzler, and D. C. Erbach. 2000. High-speed cultivation and banding for weed management in no-till corn. Appl. Eng. Agric. 16:359-365.
Hartzler, R. G and D. D. Buhler. 2000. Occurrence of common milkweed in cropland and adjacent areas in Iowa. Crop Protection 19:363-366.
Paarlberg, K. R., H. M. Hanna, D. C. Erbach, and R. G. Hartzler. 1998. Cultivator design for interrow weed control in no-till corn. Appl. Engin. Agric. 14: 353-361.
Buhler, D. D., D. A. Netzer, D. E. Riemenschneider, and R. G. Hartzler. 1998. Weed management in short rotation poplar and herbaceous perennial crops grown for biofuel production. Biomass and Bioenergy 14:385-394.
Buhler, D.D, R.G. Hartzler, F. Forcella. 1997. Weed seed bank dynamics: Implications to weed management. J. Crop Prod. 1:145-168.
Hartzler, R.G. 1997. A survey of attitudes towards velvetleaf management in soybean. Crop Protection 16:483-485.
Buhler, D. D., R. G. Hartzler and F. F. Forcella. 1997. Implications of weed seedbank dynamics to weed management. Weed Sci. 45:329-336.
Hartzler, R.G. 1997. Velvetleaf interference in soybean: A survey of yield loss estimates and management recommendations. Weed Sci. Soc. Amer. Abstr. 36: 40.
Buhler, D. D. and R. G. Hartzler. 1997. Biological and control challenges to the development of integrated weed management systems. Weed Sci. Soc. Amer. Abstr. 36: 77.
Hartzler, R. G. and D. D. Buhler. 1996. Influence of seed vintage on emergence characteristics of four annual species. North Central Weed Sci. Soc. 51: 30.
Hartzler, R. G. 1996. Velvetleaf (Abutilon theophrasti) population dynamics following a single year's seed rain. Weed Technol. 10:581-586.
Wong, A. T. S., G. L. Tylka and R. G. Hartzler. 1993. Effects of selected herbicides on in vitro hatch of Heterodera glycine. J. Nematology 25:578-584.
Owen, M. D. K, R. G. Hartzler and J. Lux. 1993. Woolly cupgrass (Eriochloa villosa) control in corn (Zea mays) with chloroacetamide herbicides. Weed Technol. 7:925-929.
Hartzler, R. G., B. D. Van Kooten, E. Hall, D. Stoltenberg and R. Fawcett. 1993. On-farm evaluation of mechanical and chemical weed management strategies in corn. Weed Technol. 7:1001-1004.
Hartzler, R. G. and G. W. Roth. 1993. Effect of prior year's weed control on herbicide effectiveness in corn (Zea mays). Weed Technol. 7:611-614.
Recent Extension Publications
Buhler, D.D., R. G. Hartzler, F. Forcella, and J. L. Gunsolus. 1997.Relative emergence sequence for weeds of corn and soybeans. SA-11.
Hartzler, R. G. and D.D. Buhler. 1996. Weed seeds and the seedbank - Implications for weed management. IPM-48.
Hartzler, R. G. and M. D. K. Owen. 1994. Herbicide resistance - Concerns and management. IPM-39.
Hartzler, R. G. 1993. Reducing herbicide use in row-crop production. IPM-36.
Hartzler, R. G. 1993. Crop-Weed Interactions. IPM-35.
Giles, K., A. Ormord, M. Phoofolo, J. Obrycki, W. Wintersteen, R. Hartzler, M. Rice. 1996. Musk Thistle. IPM-45.
Hartzler, R. G. and M. D. K. Owen. 1993. Pm-1176. Weed management in conservation tillage.
Hartzler, R. G. 1992. Pm-1506. Protecting Iowa's rare and endangered plant species.
Hartzler, R. G. 1996. Common waterhemp - A portrait of herbicide resistance. IPM-46 . Poster developed in collaboration with Agribusiness Association of Iowa.
Hartzler, R. G. 1995. Woolly cupgrass management. IPM-44. Poster developed in collaboration with Agribusiness Association of Iowa.
Hartzler, R. G. WRAP - Weed Resistance Assessment Program. 1995. Software program designed to evaluate weed management programs for selection pressure on weeds from ALS-inhibiting herbicides.
Hartzler, R. G. and W. Wintersteen. 1993. Here's what you should know about the atrazine label changes. Poster developed in collaboration with Iowa Fertilizer and Chemical Association.
Other activities
Associate Editor for Weed Science. 1996-1999.
Weed Management Issue Team leader, Leopold Center for Sustainable Agriculture, 1996 - present.
Agronomy Day Planning Committee, Chair, 1996-97.